Question about Cozy (W352E) Heater

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Thermostat fails every year

I have a cozy dual sided wall heater and every year my thermostat needs to be replaced. I have tried millivolt only thermostats and that does not solve the problem. Should I just stock up on cheap thermostats or is this a known problem?

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  • warrentaylor Jan 01, 2008

    Well, that may be true but I've have the mercury type thermostats in this long collection and they fail as well. The only difference is that COZY has recommended a millivolt ONLY style of thermostat. Previously I had been using the combo type. For the millivolt style, my choices are more limited and for the last 2 years these are 'contact' style. It just seems odd that every thermostat I've every had for the last 8 years has needed replacement the following year.

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The term "you get what you pay for" applies here. Get a thermostat that at least has a mercury bulb style. the cheap contacts or points style may just need to be cleaned each year. The digital seem to be the best, but there is no need to go over board either. Keep it simple.

Posted on Jan 01, 2008

  • Rob Luna
    Rob Luna Jan 02, 2008

    The contact type thermostat usually can be solved by cleaning off the points on the contact. As this is a milli-volt heater, it means just that, its less than 1 volt usually .750. So it doesn't take much to break the path of electricity. During the summer and fall months when the heat is not being used, a layer of dust and or grease can accumulate in the contacts where they meet. A cleaning with a small file, emery cloth, or even fine grit sandpaper will do the job removing the stuff that is preventing the current from going through. Or you can just do as you said and stock up on some thermostats, they are inexpensive compared to the other types. You didn't say if you tried a digital one. The heater itself is a pretty simple system. I don't know of any other part that would cause premature failure of the thermostat, if that is what you were wondering.

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