Limit Or Flame Rollout Switch Lockout







There is a difference between a limit switch and a rollout switch. After 3 to 5 tries the control board will lock the furnace out for 3 hours, which can be reset by cycling power or thermostat. 33 LIMIT CIRCUIT FAULT – Indicates the limit, or flame rollout is open or the furnace is operating in high-heat only mode due to 2 successive low heat limit trips. I replace the common round dial Honeywell. I replaced the inducer fan and now the furnace will go through the start-up sequence (check high limit switch, check flame rollout switch, turn on inducer fan, check pressure switch, turn on spark igniter, send voltage to gas valve) but it fails to light and goes into system lockout (no flame). Check for: defective blower motor, loose blower wheel, dirty filter or duct system, deffective switch or connection, inadequate combustion air supply flame roll-out switch or fuse link, open. Furnace Lockout Mode Reset Help The last thing anyone wants to deal with, when it is bitterly cold outside, is a furnace that stops working. The flame actually acts as a switch. However, furnaces usually lock out for a reason. FLAME ROLLOUT SWITCH REQUIRES MANUAL RESET. The description for #4 follows:. monitors the flame signal and communicates with the integrated circuit board. Flame Rollout Switch - will shut off the gas supply to the heater in the event of flame rollout. The new thermostat ran fine for that night and the code came up the. 1 AFUE Input 38,000 - 120,000 Btuh The high efficiency upflow gas furnace may be installed free standing in a utility room, basement, or enclosed in an alcove or closet. Check for proper com-. Flame Rollout Switches (2) • Factory installed on burner box • Switches provide protection from abnormal operating conditions • Manual reset Limit Controls • Primary limit located on vestibule panel • Secondary limit located on blower housing • Automatic reset Optional Accessories High Altitude Pressure Switch Kit. Control will auto-reset after 3 hours. AUTO-RESET WILL OCCUR AFTER 3 HOURS. electrical junction box (if required, location may vary) media cabinet operating instructions not shown (located on main furnace door, see operating instructions inside door figure). Check for: ABNORMAL FLAME-PROVING SIGNAL - Flame is proved while gas valve is de-energized. com Community Forums. The flame roll-out switch activates when the furnace heats to a predetermined high temperature limit. For flame Roll-out switch or fuse link, refer to #33. Some control systems may also automatically reset after a specific period of time. Check for: - Stuck gas valve relay on control or miswire to gas valve circuit. The Flame LED shall flash rapidly when lockout is due to undesired flame. There also should be a little more to the lockout code ie. Heater) MHU75LP. Flame Rollout Switches (2) Manual reset switches are factory installed on the front of the burner box. Maximum Thermostat Cord Coal-trol Digital Thermostat Fume Switch ORG (High Limit/Fume Switch) K1 1 Yellow Furnace Auger Motor ---2 Orange Power Vent Motor (if required) K9 3 White Neutral 4 NC. The furnace control will lock-out when flame current falls to 0. Flame rollout switch. Very seldom does the flame rollout switch on these trip but it is quite possible. If NO voltage is found, the roll out switch is open. I have determined LED code 13. Limit or flame roll-out switch lockout, refer to code 33. Microprocessor-based precision. Furnace tries to relight itsel. 5 microamps DC. However, furnaces usually lock out for a reason. Limit Control (Overheat Switch) - will shut off the gas to the heater should excessive discharge temperatures occur. Soft lockout - 5th abnormal event this call for heat - Limit circuit opened during run is the last failure. Rollout Switch Pressure switch cycle lockout Limit switch open blower failure it the flame is not detected within 2 seconds of the gas valve. Main Limit or Roll Out Switch is open. If you bypass the roll out limit by hooking it's two wires together and it stops the blink code then the reset button is malfunctioning and you need a new limit. The Emerson 3f12-301 1/2-inch disc limit control is designed for safety in gas-fired furnaces, unit heaters, rooftop units and HVAC systems. If NO voltage is found, the roll out switch is open. The control panel has an indicater light that shows the high limit or rollout switch open. If the pressure switch is not closed with the draft inducer running, check for a stopped up vent or a stopped up condensate drain line if you have a condensing furnace. installation, adjustment, repair and maintenance of these controllers must be performed by qualified personnel. 33 LIMIT CIRCUIT FAULT - Indicates a limit, or flame rollout is open. Control will auto-reset after 3 hours. Reznor RZUDAP06050000 - Unit Heater - 60 MBH High Efficiency (Spark Ignition With Lockout) Sizes 30-125 also include a flame rollout safety switch. So far, I have replaced air filter, flame sensor and high limit switch. 21 GAS HEATING LOCKOUT - Control will NOT auto reset. Interrupt the 24 VAC power at the control for at least one second. The control provides diagnostic codes (flashing LEDs) to aid in testing and troubleshooting. Check for: - Stuck gas valve relay on control or miswire to gas valve circuit. For flame roll-out switch or fuse link, refer to #33. The draft inducer spins, and the burners come on (I see the flames), but nothing comes out of my air vents, and eventually the furnace shuts off. Very seldom does the flame rollout switch on these trip but it is quite possible. My particular furnace model is a Trane XR80. Aluminized steel inshot burners, direct spark ignition, electronic flame sensor, combustion air inducer, redundant automatic dual stage gas valve with manual shutoff. Pressure Switch Proves Combustion Air Inducer operation before allowing gas valve to open. "LIMIT OR FLAME ROLLOUT SWITCH LOCKOUT- LIMIT SWITCH WAS OPEN LONGER THAN 3 MINUTES. electrical junction box (if location may vary) blower door safety switch furnace board rating plate not shown (located on blower door) main limit switch (behind gas valve. Unit locked out after three trials. LIMIT OR FLAME ROLL-OUT SWITCH LOCKOUT - Control will auto reset after three hours. My bryant gas heater is displaying a code 13 limit switch lockout and after 3 hours and the manual reset has been activated it comes on and works till the thermostat reads about 60-61 degrees and then shuts off. 33 LIMIT CIRCUIT FAULT - Indicates a limit, draft safeguard, flame rollout, or blocked vent switch (if used) is open. How to troubleshoot a gas furnace. LIMIT L1 (HOT) L2 LIMIT CONTROLLER FLAME PROBE RED ADAPTER BLUE HOT SURFACE IGNITER MV MV GAS BURNER GROUND H S 2 (clip) Fig. the 2-stage furnace control will auto-reset in 3 hr. Blower will. 8 RED FLASHES: This fault is indicated if the flame is lost five times (four recycles) during the heating cycle. 33 LIMIT CIRCUIT FAULT - Indicates a limit, draft safeguard, flame rollout, or blocked vent switch (if used) is open. REVISION: 9 CN: 9108T00 DATE: 2009-6-12 Fault LED COM LED User Interface Display Control Display RECYCLE Flame is off when flame should be detected. The Emerson 3f12-301 1/2-inch disc limit control is designed for safety in gas-fired furnaces, unit heaters, rooftop units and HVAC systems. Inadequate flame carryover or rough ignition, green/yellow wire MUST be connected to furnace sheet metal. The limit will say something like 160-20 or 200-30. If, however, this third attempt fails to achieve flame, the control will go into system lockout. Lockout shall automatically reset after 1 hour. If 24 volts IS present, the control is in a lock out due to flame failure or roll out. Open flame rollout swltch (FRS) — Code 13 or 33. microamps DC. Limit Or Flame Rollout Switch Is Open The furnace limit switch is a safety switch that will shut off the main burners and turn on the blower motor to protect the furnace from overheating. what the manual says for code 13. On the control board the flash code reads. Limit Switch Testing. Your furnace shuts down and goes into a lock out condition until you turn your power switch back off and on again. LIMIT L1 (HOT) L2 LIMIT CONTROLLER FLAME PROBE RED ADAPTER BLUE HOT SURFACE IGNITER MV MV GAS BURNER GROUND H S 2 (clip) Fig. COOL MODE In a typical system, a call for cool is initiated by closing the thermostat contacts. mended in the User's Manual. Check for: ABNORMAL FLAME-PROVING SIGNAL - Flame is proved while gas valve is de-energized. It has vacuum lines that are connected from the pressure switch to the ventor motor that measure a neg air pressure. If NO voltage is found, the roll out switch is open. 17 Self test Boiler was just energized and control is running a self check. How Does a Gas Furnace Pressure Switch work? A pressure switch has a diaphragm that pulls out when a vacuum is applied to it. The control panel has an indicater light that shows the high limit or rollout switch open. Bryant 383KAV A98523. DO NOT bypass the switch. Low flame signal control lockout point is. Flame Rollout Switch High Limit Control On/Off Switch Water Pressure Switch Digital Option 115/230V, 60Hz, 1 Ph Power Supply 115/230/24V Transformer 100% Pilot Shut-off; Lockout – Propane units only Electronic, Intermittent Ignition Pilot (IID) High Limit Control On/Off Switch Flame Rollout Switch Water Pressure Switch. Auto High Limit Switch - (hidden, STD) The limit control is mounted in the air stream and will shut off the gas supply in the event of overheating. Note: I am not a professional. This normally closed switch opens on a temperature rise. Interrupt the 24 VAC power at the control for at least one second. What is the difference? If the furnace will not come on because of 2, isn't that the same as 6?. If the flame signal is not present after turning off the gas supply, check the gas valve electrical connection. Try finding out what exactly is locked out so that you can either correct the issue or have a contractor get it corrected for you. 00 Add to cart; 1370913S Goodman Amana Furnace Limit Switch $ 22. Flame rollout switch. Yesterday I installed a Honeywell CT8602C THERMOSTAT. Furnace Circuit Boards. What does this switch do and why is it open?. Reset switch or replace fuse link. If the answer is NO, go to the step indicated in the NO column. 5 RED FLASHES: This fault is indicated if the limit circuit is open for more than fifteen minutes, usually indicating that a manual-reset rollout switch has opened. Flame roll-out switch requires manual reset. Flame rollout switch. Common Problems. Lockout may be manually reset by removing power from the control for more than 1 second or removing the thermostat call for heat for more than 1 and less than 20 seconds. Blower will run for 4 minutes or until open switch remakes whichever is longer. Some control systems may also automatically reset after a specific period of time. I have a garage heater (Mr. 13 LIMIT OR FLAME ROLL-OUT SWITCH LOCKOUT - Auto reset after three hours. Blower will. Rapid Amber Low flame sense current 4 Flashes Y present with no G call Red 1 Flash Flame present with gas off 2 Flashes Pressure switch stuck closed 3Flashes Pressureswitchstuckopen 4 Flashes Limit switch open / open fuse 5Flashes Rolloutswitch open/ fuse 6 Flashes Pressure switch cycle lockout 7 Flashes Ignition lockout due to retries 8. The maximum number incidents has. Flame detected out of. AUTO-RESET WILL OCCUR AFTER 3 HOURS. Interrupt the 24 VAC power at the control for at least one second. 5 microamps DC, the furnace control will lock out. 1013102 ICP Heil Tempstar Rollout Limit Switch Sale! $ 10. Bryant 383KAV A98523. Furnace Lockout Mode Reset Help The last thing anyone wants to deal with, when it is bitterly cold outside, is a furnace that stops working. Limit Switch Open: Anytime the Limit Switch is open, the gas valve is immediately de-energized and both the combustion blower and indoor blower are enabled. pressure switch opened 4 times during the call for heat. after 3 hrs. switch was open longer than. flame sensor flame sensor. If it doesn't reset, then the hi-limit switch could be bad. I replace the common round dial Honeywell. Unit goes into lock out. The high limit can trip due to dirty filters, dirty blower wheels, closed registers (supply and return), failed heat exchangers, and failing exhauster motors. That can be caused by a decreased air flow through the heat exchanger. Working on a 80% York gas furnace. Bryant 383KAV A98523. For flame roll-out switch or fuse link, refer to #33. 13 LIMIT OR FLAME ROLL-OUT SWITCH LOCKOUT - Auto reset after three hours. At the end of the ignitor warm-up time, both valves in the 36E manifold gas valve are opened. If open longer than 3 minutes, code changes to lockout #13. Refer to #34. If NO voltage is found, the roll out switch is open. ̸Ҳ̸ҳ[̲̅B̲̅][̲̅7̲̅][̲̅B̲̅ - fr-fr. Correct inadequate combustion-air supply, component fail-. ) CC1 T2 T3 T1 CC2 T2 T1 T3 C1. StA: 18: Flame Out of Sequence. high limit (n. Ducane Parts. I have no idea why an open limit switch would lock out the compressors, but I confirmed that it does by disconnecting the limit switch during A/C operation. So far, I have replaced air filter, flame sensor and high limit switch. This open-on-rise rollout safety switch features a manual reset (cut-in) and 301 degree cut-out temperature. Open limit switch (IS) — Code 13 or 33. Blower will run for 4 minutes or until open switch remakes whichever is longer. Check for: - Stuck gas valve relay on control or miswire to gas valve circuit. 6 9 Flashes (Incorrect Polarity of L1/L2) 20 3. Says to check/repair: Main limit switch. Simply put, it senses the temperature of the furnace and tells the blower fan to turn on and off at the appropriate tim. Switch stuck closed, should be open Pres. 5 microamps DC, the furnace control will lock out. If open less than 3 minutes status code #33 continues to flash until blower shuts of Flame rollout switch requires manual reset. My bryant gas heater is displaying a code 13 limit switch lockout and after 3 hours and the manual reset has been activated it comes on and works till the thermostat reads about 60-61 degrees and then shuts off. This site is maintained by Technical Hot and Cold. Your furnace will shut down, and try ignition again. 2 flashes, then pause Pressure switch stuck closed 3 flashes, then pause Pressure switch stuck open 4 flashes, then pause Open limit switch 5 flashes, then pause Open rollout switch 6 flashes, then pause 115 VoltAC power reversed / Improper ground 7 flashes, then pause Low flame sense signal Continuous flashing Flame has been sensed when. Note: I am not a professional. #33 LIMIT CIRCUIT FAULT - Indicates a limit, draft safeguard, flame rollout, or blocked vent switch (if used) is open. flame in 4 attempts. How to tell if a furnace ignition switch is bad? American standard freedom 80 furnace furnace was running and blowing cold air only i looked at the diagnostic led and it was flashing 2 short flashes. Lockout shall automatically reset after 1 hour. Limit Switch Functions. • Plugged burner orifice. If the unit is off on roll out switch, check for 24 volts between R1 and ground on the ignition control. I have determined LED code 13. Control will auto-reset after 3 hours. Repair your Bryant Furnace Switch for less. switch is factory set and no field adjustment is necessary. If NO voltage is found, the roll out switch is open. Location: Green Acres. The primary limit switch, which prevents the furnace from heating to unsafe temperatures, is programmed to reset automatically after a malfunction. The pressure switch and limit switches are there for your safety. Flame Sensor Spark Ignitor BLR 3 1 Ig i nt oC l Blower Limit Relay Flame Rollout Switch Max. Note: I am not a professional. Figure 1: Wiring for 1 Rod Flame Sense used for Local (Internal) Sense A rollout switch (a normally closed set of contacts) is positioned to detect flames rolling out of the combustion chamber. Consider flame safety, limit switch, and vent system. • Poorly connected or missing ground wire. This could be due to a heat exchanger failure. If flame is not established on the fourth trial for ignition (initial try plus 3 re-tries), the circuit board de-energizes the gas valve and goes into lockout. If 24 volts IS present, the control is in a lock out due to flame failure or roll out. Modine Hot Dawg Flame Rollout Switch 5H75002-2 Flame Rollout Switch for Modine Hot Dawg Heaters with Hot Surface Ignition (HD30-75) More Info $39. What does this switch do and why is it open?. If open less than 3 minutes status code #33 continues to flash until blower shuts of Flame rollout switch requires manual reset. REVISION: 9 CN: 9108T00 DATE: 2009-6-12 Fault LED COM LED User Interface Display Control Display RECYCLE Flame is off when flame should be detected. auto-reset after 3 hours. There is a difference between a limit switch and a rollout switch. If the high temperature limit or flame rollout sensor open. Unfortunately, the user manual of the Trane XR90 furnace offers no explanation of what the blinking light means that can be seen behind a small hole in the bottom front panel of this high-efficiency gas furnace. For flame Roll-out switch or fuse link, refer to #33. ) GAS VALVE HLO HLI FP PS1 MVL MVH GND GND PS2 MV COM TR TH Low Voltage (24 VAC) Line Voltage (120 VAC) G G ROLLOUT SWITCH (N. When the flame is present, the switch is closed and will conduct electricity. Vent limit or draft safeguard switches are normally close switches usually mounted on the draft hood on near the exhaust vent pipe exit. It has a White Rodgers control board M# 50A50 241. Furnace tries to relight itsel. Heat Exchanger Tubular construction, aluminized steel, life cycle tested. SELECT INSTRUCTION **ATTENTION INSTALLERS** These instructions describe how to properly replace a When connecting the wires from the blower motor, please single stage *G6/L1 control board (PN 624631) with a note which wire connects to the HEAT and COOL terminals *G7 control board (PN 624690). Rollout Switch Pressure switch cycle lockout Limit switch open blower failure it the flame is not detected within 2 seconds of the gas valve. The furnace control will lock-out when flame current falls to 0. Limit Control Automatic reset, primary limit is accurately located on header box on all units. reads {limit circuit lockout draft safeguard, flame rollout, or blocked vent switch (if used) is open longer than 3 minutes}. Describe the function of a draft safeguard switch. Aluminized steel inshot burners, direct spark ignition, electronic flame sensor, combustion air inducer, redundant automatic dual stage gas valve with manual shutoff. When a condition sets in where the flames want to roll backwards out of the firebox instead of into the firebox, the condition is sensed by the roll out switch. 1 AFUE Input 38,000 - 120,000 Btuh The high efficiency upflow gas furnace may be installed free standing in a utility room, basement, or enclosed in an alcove or closet. If the pressure switch is not closed with the draft inducer running, check for a stopped up vent or a stopped up condensate drain line if you have a condensing furnace. 33 LIMIT CIRCUIT FAULT – Indicates the limit, or flame rollout is open or the furnace is operating in high-heat only mode due to 2 successive low heat limit trips. The limit switch is designed to shut down the gas valve if the temperature in the heat exchanger becomes higher than it should. Reset switch or replace fuse link. Flame Present With Gas Valve Off Over Temperature Switch (RollOut) Open Auxiliary Limit Switch Open Main Limit Switch Open NO Gas Valve Feedback Signal Water Sensed One - Hour Lockout Low Pressure Switch Closed, Should be Open Low Pressure Switch Open, Inducer On High Speed Low Pressure Switch Open, Inducer On Low Speed. #33 LIMIT CIRCUIT FAULT - Indicates a limit, draft safeguard, flame rollout, or blocked vent switch (if used) is open. With no wires attached to the limit switch the reading between the two terminals should be the same reading seen when the two probes of the ohm meter are touched together. I have determined LED code 13. Steady ON - Good flame signal Blinking - Weak flame signal Steady OFF - No flame signal. what the manual says for code 13. If flame is not established on the fourth trial for ignition (initial try plus 3 re-tries), the circuit board de-energizes the gas valve and goes into lockout. run for 4 minutes or until open switch remakes whichever is longer. the unit is indicating that the limit switch or flame roll out switch is open (open in safety switch circuit). Solution: You might need a new ignitor, rollout switch, limit switch, pressure switch or control board. monitors the flame signal and communicates with the integrated circuit board. lockout due to pressure switch failure or flame roll out switch etc. You want it to shut down in that case. Disconnect and note the wires that go to each switch terminal. Note that a tripped roll out sensor generally indicates a serious, potentially dangerous problem. Code 33: Limit or flame roll-out switch open, if open longer than 3 min. If NO voltage is found, the roll out switch is open. If open less than 3 minutes status code #33 continues to flash until blower shuts of Flame rollout switch requires manual reset. Inadequate flame carryover or rough ignition, green/yellow wire MUST be connected to furnace sheet metal. They usually mean a high limit or burner box limits. Full screen Standard. After one hour in lockout, the control will automatically reset itself. This could be due to a heat exchanger failure. Cycle power to the unit; let the roll out close and check to see if a roll out condition exists. The switch will open and shut off power to the gas valve, if a flame rollout or overheating condition occurs in the gas control area. Modern day high efficiency furnaces monitor a variety of conditions before, during and after the combustion process. Flame rollout switch. Once the flame roll-out switch has been tripped, it must be reset before the appliance can produce heat again. FAST FLASH Flame Present With Gas Valve Off STEADY ON Flame is Sensed Fenwal Circuit Board LED CODE (# of flashes) GREEN LED STATUS / ERROR SLOW FLASH Normal Operation - No Call for Heat FAST FLASH Normal Operation - Call for Heat 2 Ignition Lockout - No Flame Detected 3 Airflow Fault - Pressure Switch Open or Closed 4 High Limit or Rollout. So far, I have replaced air filter, flame sensor and high limit switch. Refer to #33. AUTO-RESET WILL OCCUR AFTER 3 HOURS. The control board is designed to bring the blowers on in the event one of the limits opens to protect the heat exchanger from thermal stress. Flame roll-out switch requires manual reset. If there is no flame, the switch is open, and electricity will not flow. instructions for 36" wide vacuum-break starters rated 360 amperes, 7200 volts, roll-out type hazardous voltage. 2 VDC or higher (Fig. The primary limit switch, which prevents the furnace from heating to unsafe temperatures, is programmed to reset automatically after a malfunction. After one hour in lockout, the control will automatically reset itself. Blower will run for 4 minutes or until open switch remakes whichever is longer. If you still have the manual which came with your furnace, refer to their troubleshooting section for additional help. Check for: - Mis-wired gas valve - Green wire MUST be connected to furnace Doc Retrieval. If open longer than 3 minutes, code changes to lockout #13. Blower will. manually reset by turning 115-v or 24-v power off (not at 33 LIMIT OR FLAME ROLL-OUT SWITCH IS OPEN - Indicates the limit, rollout switch or auxiliary limit. HIGH LIMIT (N. If the blower came on at the same time as the burner, it would pump cold air through the house at first. " I have already done the manual reset limit switch procedure and restarted the furnace and the problem still exists. Refer to status code #4. Says to check/repair: Main limit switch. Each one has its own method of proving the flame. • Microprocessor-based precision • Twinning compatible with another ICM2805 furnace control. 1013102 ICP Heil Tempstar Rollout Limit Switch Sale! $ 10. Try turning off the power to the unit for a couple of minutes and seeing if it resets itself. Auto-reset will occur. Low cost, form, fit and functional replacement control board • Controls gas valve, inducer draft motor, circulating blower and hot surface ignitor • Monitors timing, trial for ignition, flame sensing, lockout, plus pressure, rollout and limit switches. PS1 CLOSED Shorted Pressure Switch, first stage 4 Low Flame Signal X N/A LO (Short lock out) 87 Roll Out Fault X ERR 87 ROLLOUT OPEN Publication No. For flame roll-out switch or fuse link, refer to #33. device will deenergize. ) rollout (n. Gas Furnace Ignition Control Operation | HVAC Heating - Flame Sensing and Safety Anyone of those types of ignition electronic systems controls various gas furnaces. Code 33: Limit or flame roll-out switch open, if open longer than 3 min. The circuit board goes to one flash on the green LED to indicate ignition fail-ure lockout. The control monitors the status of the room thermostat, limit and rollout switches, air pressure switch and flame sensor before energizing the vent motor, blower control, hot surface ignitor, and gas valve. run for 4 minutes or until open switch remakes whichever is longer. - Control will auto reset after three hours. the 2-stage furnace control will auto-reset in 3 hr. Limit or Flame rollout switch lockout. The control. LIMIT OR FLAME ROLL-OUT SWITCH LOCKOUT - Control will auto reset after three hours. c) 2 FLASH System lockout - failed to detect or sustain flame d) 3 FLASH Pressure switch open or closed, or auxiliary limit (located on blower housing) open Note: This LED code will not appear until after the indoor blower has turned off (approx. Check 115-v line voltage — LED off. Outlet 3 Limit 2 1 3 2 1 Max. LIMIT CIRCUIT LOCKOUT - Lockout occurs if a limit or flame rollout switch is open longer than 3 minutes. Faulty High-Limit Switch. So take that into consideration before you attempt any of these troubleshooting steps. Check for: - Stuck gas valve relay on control or miswire to gas valve circuit. limit or rollout switch open heating no flame sensed failed mode 1 hour wait- at start of cycle ing period for auto reset from flame failure to lockout liquid sensor not used flame sensed but. GAS HEATING LOCKOUT - Control will NOT auto reset. Multiple safety controls like bimetallic flame rollout or over temperature limits must be designed into the furnace for safety. - Refer to #33. 3 – Typical hookup for competitive replacement with indirect sense using flame probe Fig. longer than 3 minutes, code changes to lockout #13. Blower will run for 4 minutes or until open switch remakes whichever is longer. 5 RED FLASHES: This fault is indicated if the limit circuit is open for more than fifteen minutes, usually indicating that a manual-reset rollout switch has opened. 7 RED FLASHES: This fault code indicates that the flame could not be established. IGNITION LOCKOUT - Control will auto-reset after three hours. The furnaces flame rollout switch is designed to shut the furnace down immediately if flame/excessive heat is sensed in an area they don't belong. [7] LIMIT CIRCUIT LOCKOUT -- Lockout occurs if the limit or flame rollout switch is open longer than 3 minutes or 10 successive limit trips occured during high-heat. Check for: - Stuck gas valve relay on control or miswire to gas valve circuit. • Corroded or dirty Flame Sense Rod. 33 LIMIT CIRCUIT FAULT - Indicates a limit, or flame rollout is open. requires manual reset. Will light, but will not stay lit. Indianapolis, IN 46231. A high-temperature limit switch also called a fan limit switch or simply a limit switch is an important device used in forced-air furnaces powered by gas or heating oil. However, furnaces usually lock out for a reason. Flame Sensor Pressure Switch COM R H H L1 L2 R GR(G) Y Y Y R BK BK W W BK XFMR Press Switch Fan Motor Flame Rollout Switch Limit Control Flame Sensor BL W BK BK W P Plug BK Hot Surface Igniter O R R W Plug Power Exhaust Motor BK Honeywell Combination Gas Control R 24V 115V Xfmr L2 (W) L1 (BK) Low Volt Therm (By Others) Wiring Legend Line 24V. The switch will open and shut off power to the gas valve, if a flame rollout or overheating condition occurs in the gas control area. Modine Hot Dawg Flame Rollout Switch 5H75002-2 Flame Rollout Switch for Modine Hot Dawg Heaters with Hot Surface Ignition (HD30-75) More Info $39. SYSTEM LOCKOUT (NO FLAME) PRESSURE SWITCH PROBLEM HIGH LIMIT (TCO) OPEN FLAME SENSED WITH GAS VALVE OFF FLAME ROLLOUT SWITCH (FL) OPEN FLASHING SLOW FLASHING FAST CONTINUOUS ON CONTINUOUS OFF 2 FLASHES 3 FLASHES 4 FLASHES 5 FLASHES 6 FLASHES Sequence of Operations (TCO) contacts are closed, and the flame rollout (FL) switch is closed,. Correct inadequate combustion-air supply, component fail-. Refer to #34. Troubleshoot Fault Status Codes. If the unit is off on roll out switch, check for 24 volts between R1 and ground on the ignition control. If 24 volts IS present, the control is in a lock out due to flame failure or roll out. ROLLOUT SWITCH TRIPPING HIGH LIMIT SWITCH TRIPPING. I do not recommend resetting the rollout switch without finding the reason for the failure. FAST FLASH Flame Present With Gas Valve Off STEADY ON Flame is Sensed Fenwal Circuit Board LED CODE (# of flashes) GREEN LED STATUS / ERROR SLOW FLASH Normal Operation - No Call for Heat FAST FLASH Normal Operation - Call for Heat 2 Ignition Lockout - No Flame Detected 3 Airflow Fault - Pressure Switch Open or Closed 4 High Limit or Rollout. Refer to #33. failed to ignite gas and prove. DO NOT bypass the switch. They usually mean a high limit or burner box limits. "LIMIT OR FLAME ROLLOUT SWITCH LOCKOUT- LIMIT SWITCH WAS OPEN LONGER THAN 3 MINUTES. If open less than 3 minutes status code #33 continues to flash until blower shuts off. - Refer to #33. For flame roll-out switch or fuse link, refer to #33. 0 microamps DC, either replace or remove and clean flame sensor with a fine grade steel wool.