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Why does a pilot light go out,but the fan keeps running?

I have a Dayton Heater Model 3E233 and the pilot light keeps going out ,but the fan continues to run. Just changed the thermo-couple.

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Some heaters use a timer to bring fan on as opposed to some which use temp

Posted on Feb 24, 2009

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Pilot light on my heater keeps going out an I have a hard time lighting it. It's a Royal Jet serial no. Is 55FG385412 Model FG355 help if u can


Get the pilot light sensor replaced as the burn down with use and if they are just out of spec the sensor cools and shuts off the gas flow for safety

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Does unit fan come on ??? Is flue clear as most units have a safety klixon if exhaust not venting properly.

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Pilot does not light


Check spark electrode is clean and in the right postion , check flame sencer is clean . check pressure switch hose are not split , jump out pressure switch see if it lights. you could also check over heat try jumping that out see if it lights , pilot may need cleaning if standing pilot.

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Have a dayton 3F405D propane greenhouse heater don't know where to light the pilot light.


Find where the gas line connects to the gas valve on the back of the heater, from the gas valve, follow a small aluminum tube going into the back of the heater. There may be a removable door to access the pilot assembly. If there is no aluminum tube, the unit has electronic ignition and no pilot lite. Turn the gas knob to off, then to pilot. Hold the gas valve in and with a long match or gas grill lighter, light the pilot. Continue to hold the knob in for about 30 seconds. After that, release the knob and check to make sure the pilot stays lit. If so, rotate the knob to ON. The thermostat will kick the burners on.

Mar 30, 2011 | Dayton (3E405) Gas Radiator Heater

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Have Dayton 3e227a gas heater fan has quit, need new motor, can you supply source to buy? Tim


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Feb 18, 2011 | Dayton (3E227) Gas Radiator Heater

1 Answer

My dayton NG heater fan will not shut off properly


Sounds like a bad fan switch. The switch is located on the heat exchanger and is 110 volt bi-metal switch. Follow the wires from the blower going back to the heatexchanger. Graingers can get you a new switch if you give them your model number. www.grainger.com.

Dec 12, 2009 | Dayton Heaters

1 Answer

Heater keeps clicking off and on. won't stay running continually


May have a dirty pilot or bad pressure switch. Jump out the pressure switch (if it has one) and if it stays running, it's the switch. If it cycles still, you will need to clean the pilot assembly.

Dec 04, 2009 | Dayton Heaters

1 Answer

Pilot light


Hi the thermocouple is a long copper wire that goes back to the gas valve from the pilot .

i would clean the flame senser first , then check the pressure switch jump this out , then check the fan control or snap disc jump this out see if it runs if you need A THERMOCOUPLE then honeywell universal will do

Apr 07, 2009 | Dayton (4LX41) Heater

1 Answer

Dayton Furnace - Pilot Light Goes Out but Fan keeps running?


Pilot lighted furnaces have a thermocouple made from disasimilar metals that when heated create electricity to actuate a relay that alows the gas to flow to the furnace.

When the thermocouple gets coated with carbon from the pilot lights constant burning it acts as an insulator and keeps the thermocouple from getting enough heat to generate electricity, a very good safety factor.

What you have to do is locate the thermocouple it should be located over the pilot light, you will see a gray substance around the thermocouple it will be hard like cement, take a knife and scrape away as much of the gray material as possible then sand the themocouple with a medium sandpaper until it shines, use one of you wifes emery boards, this should solve your problem.

Feb 24, 2009 | Dayton (4LX41) Heater

2 Answers

I have a Dayton gas heater Model 3E225


Does the main blower fan kick on? Also, if the heater is vented outside via a flue pipe, there may be a small (about 3 or 4 inches in diameter) vent fan that kicks on to ensure the exhaust fumes are evacuated through the flue pipe. If there's a problem with that fan, the burner won't light either.

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