Question about Cozy (W352E) Heater

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Heater won't come on when temp drops...must reset limit switch every time.

Have replaced thermostat and had serviceman check out heater. Said limit switch ok and could find no problem. But something is clearly wrong...should not require manual re-setting of limit switch every time. Also, heater then turns off pre-maturely, and won't kick back on.

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Re: heater won't come on when temp drops...must reset...

The over limit switch is kicking on because something is blocking the flue, probably the insulation that goes from the adapter from the wall heater to the flue termination plate... Best bet!! Take off the wall heater cover and light a couple matches and blow them out next to the intake on the top of the heater, it should **** the smoke right up the flue and if it doesnt it is blocked by something like i said earlier...

Posted on Dec 31, 2008

Re: heater won't come on when temp drops...must reset...

Guest here,
Correction to the above post. The jumper wire is attached to the two leads that come out of the switch that the copper tube of the thermocouple attaches too, not the pilot light.

Posted on Jan 20, 2008

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Re: heater won't come on when temp drops...must reset...

The limit switch is shutting off and you are having to press the re-set button, right? The limit switch, if I am understanding you correctly, is the thermal disc type, may be ok, but what is causing it to shut off? I would first, not put total faith in the serviceman (PG&E maybe) and replace the limit switch. Its only a few bucks,and easy to do. Then if its still the same problem, look into the venting pipe. As it may not be adequate for the heater. Espically if its new. These new wall furnaces are kind of touchy. It may be larger, BTU wise, and the vent pipe may need to be enlarged. If this is a big job, and a bit too impractical, check the vent pipe, make sure its in good conditon, no leaks ect. install a cO2 detector and by-pass the limit switch.

Posted on Jan 07, 2008

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