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Cozy wall furnace model w255d pilot will not stay lit and thermopile has been replaced 750 millivolt system

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Ensure the end of the thermopile is in direct flame, any lower or higher it will not allow the pilot to stay on..

Posted on Dec 04, 2008

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Posted on Jan 02, 2017

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I have a Cozy W355D wall furnace. It's difficult to turn on. Replaced the thermostat, that helped some, but still have to turn it off, wait a few minutes, and turn it back on. Often still won't light.


So are you saying the pilot stays lit, but the main burner won't always fire. If this is a millivolt system you could have a weak pilot flame, not getting the pilot generator hot enough or you could have a weak pilot generator. If you are handy you can try cleaning the pilot. It may be better for a qualified service tech.

Jan 30, 2017 | Cozy Heating & Cooling

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I AM WORKING ON A COZY W501E WALL FURNACE AND CANT GET THE PILOT TO STAY LIT. i HAVE CHANGED THE GAS VALVE, THERMOCOUPLE,AND THE SENSOR FOR THE HIGH LIMIT. THE PILOT WONT STAY LIT.


Pretty much the only thing that will do that is the thermocouple not generating enough voltage for the valve to say it's OK.
Usually you need to hold the button for pilot lighting for 60 seconds. You can use a meter to check that it's generating enough power. The thermocouple has to be in the pilot flame properly.

Check this video:
https://www.youtube.com/watch?v=suen7QlJl4o

Gas furnace will not light Thermocouple test with the multimeter

Or see this site:
How to Test Thermocouple with Multi Meter Heating and Cooling

Feb 11, 2015 | Cozy Heating & Cooling

2 Answers

Just replaced thermopile generator and pilot will not stay lit


Check the new thermopile with a millivolt meter and make sure it has the correct output not connected to the gas valve.If it does,then the gas valve is defective.Make sure to test ONLY the thermopile.If it does not generate enough millivolts the gas valve will not open.If the piliot is dirty it will not generate enough heat for the thermopile.Make sure you have a good,strong,blue flame at the pilot.You said the piliot will not stay lit?If not then start by blowing air back through the piliot where the flame comes out with compressed air.hopefully that will clean it well enough.If not you may have to take the pilot tubing loose from the valve and use compressed air to clean it.Make sure when you reconnect the tubing to the valve USE FINGERS ONLY to start tyubing or you may crossthread the tubing....and thats NOT a good thing.Good Luck.

Jan 16, 2015 | Williams Wall Heaters: 35,000 Btu/hr...

1 Answer

Pilot light won't stay lit after releasing when lighting gas fryer


This symptom indicates something wrong with the millivolt system. Start by checking the wires from the thermopile to the gas valve, insuring they are all tight and in place. Check the hi limit thermostat, if you have an ohm meter it should read .1 or .2 across it. With you meter set to dc millivolts, and flame present on the pilot, read across the thermocouple wires (red and white) to see the millivolts generated, with the thermostat off and the gas valve in pilot position you should get approx 600 millivolt plus minus 50. The pilot will have to be on for a minute or so to get maximum millivolts. If the millivolts are correct, hi-limit closed, and all wiring is connected, you likely have a faulty gas valve. If the hi limit reads more than .1 or .2 replace the limit, if you are not getting the millivolts from the thermopile, replace it.

Apr 05, 2013 | Imperial IFS-40 - Gas Deep Fryer - 40 Lb -...

2 Answers

My cozy floor furnace wont come on


NEED MORE INFORMATION. IS THERE A LED LIGHT THAT FLASHES A CODE?. IS THE THERMOSTAT OPERATING PROPERLY? IS THIS UNITS FLUE EXHAUST VENTED TO THE OUTSIDE? & IS IT FREE OF OBSTRUCTIONS?,

Dec 25, 2012 | Cozy Heating & Cooling

1 Answer

Cozy Wall Gas Furnace Pilot won't stay lit


Hi, if you have replaced the thermocouple or thermopile generator, and it keeps going out, you will need to replace the gas valve. That's all it can be is the milivolt coil on the valve, trust me. I have been through this many times.
Sincerely,
Shastalaker7

Dec 29, 2009 | Heating & Cooling

1 Answer

Pilot on logs won't stay lit


Hold pilot button longer. if this doesn't work your Thermopile has gone bad and will not generate enough Millivolts to keep gas valve pilot open. A new thermopile will generate 750 millivolts. It cost less than $20 dollars but is difficult to replace. You should call a certified technician. They will charge you about $100.00

Oct 19, 2009 | Desa International Wall/Window Air...

2 Answers

Cozy dual sided wall heater


There isn't much to these things, its either the pilot generator or the gas valve. Or maybe both, try the first, then the second.

Dec 19, 2007 | Cozy (W352E) Heater

1 Answer

Cozy one sided wall furnace (no blower motor)


This is a weird one, but make sure all the wire connections are in the correct place. I accidentally miss wired a heater like this and it did the same thing.

Nov 27, 2007 | Cozy (W352E) Heater

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