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Cozy wall heater lights fine then goes out after 3 or 4 minutes

My first problem was that the pilot would light and when I went to turn on the furnace the pilot would go out. I have changed out the thermocoupler and now the pilot stays on and the furnace lights but then it goes out after a couple of minutes.

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Re: cozy wall heater lights fine then goes out after 3 or...

Make sure all the wire connections are good and tight. Next lift off the cover and look for a little thermal disc mounted up by top of the heat exchanger. Most have a re-set button but not all. If you have this ,by-pass it ,see if that solves the problem, if so it may be defective, or doing its job and you have a venting problem. If you don't have this and have changed the thermocouple (was it a copper tube with a fitting that screwed into the gas valve, or did it have 2 wires, that is a pilot generator, kind of same thing) make sure the probe is set correct, with the pilot flame heating the top 1/3rd of the probe. The only thing left is the gas valve.

Posted on Dec 25, 2007

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Re: cozy wall heater lights fine then goes out after 3 or...

It took me 7 attempts to light my furnace, after the last try, the furnace fired, then when the cycle completed the pilot light went out!

Posted on Nov 22, 2008

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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:

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 Heaters

1 Answer

I have a cozy model cdv255 direct vent wall furnace and the pilot light keeps going out. What causes this

dirty fuel line.have see where spider web is enough blockage to cause this. but aslo have found that the thermocouple needed replaced.

Jan 08, 2015 | Cozy Heaters

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I have a 50,000 BTU doublesided Cozy wall furnace at my cabin. Recently the pilot keeps going out, I suspect it is caused by a chimney downdraft when I close it up for the week. Can I put a wind...

make sure you have 3 feet of vent pipe out of the roof and you have a UL listed vent cap, if you can re-light the unit all parts are good.

Nov 23, 2010 | Cozy (W352E) Heater

1 Answer

Cozy wall furnace (propane) does not respond to thermostat. The pilot is lit. Furnace is 3 yrs. old and rarely works. The wire to thermostat is 20 feet.

Try jumping the two thermostat wires together to see if the heater starts. If so, replace your thermostat. If not, jump the two terminals where the thermosta twires attach to the furnace. If it starts, you have a bad thermostat wire or connection.

Jan 30, 2010 | Cozy (W352E) Heater

1 Answer

I have a cozy wall furnace and I'm having trouble with pilot

try changing the thermocouple may be worn out also check the flue heat limit switch

Best regards

Dec 11, 2009 | Cozy (W352E) Heater

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New Cozy Enclosed Front Console 70,000. Pilote goes out, gas stay

its not the valve you have a problem with the heat exchanger a baffle issue have to change.

Feb 13, 2009 | Cozy Enclosed Front Console Heater 70,000...

1 Answer

Pilot lights fine, furnace fires up, when it turns off the pilot goes out

need to have at least 3 feet of vent out of the roof, if it is to low the coll air will cold soak down to the pilot and shut it down.

Nov 08, 2008 | Cozy (W352E) Heater

1 Answer

Cozy furnace

The pilot orifice could be dirty causing the pilot flame to be too small. Unscrew the pilot tube at the pilot assembly. The orifice is inside. Remove the orifice and blow it out with compressed air only. Reassemble and see if that fixes the problem. If the pilot flame is set too low, sometimes opening a door will cause a draft to blow out the pilot. If the thermocouple is good and the pilot flame is set properly, the control valve may be bad.

Oct 22, 2008 | Cozy Enclosed Front Console Heater 70,000...

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