Question about Cozy (W352E) Heater

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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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  • mtolbert Dec 27, 2007

    How do I bypass the thermal disc? And now for some reason the pilot wont stay lit again-as soon as you let the button out after 60sec. the pilot just goes out. Any other ideas? Thanks

  • judgesagt Nov 03, 2008

    heater burns 2-3 mins the goes out and wont relight

  • Anonymous Jan 15, 2009

    My double sided wall heater pilot light will light but won't stay lit for long. The time it stays on keeps getting shorter and shorter. It is around 4 or 5 years old, can't remember exactly.

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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

  • Rob Luna
    Rob Luna Dec 27, 2007

    The disc can be by-passed by removing the wires from it and connecting to each other. It can cause the pilot problem too.

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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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1 Answer

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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.

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

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Or see this site:
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Best regards
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