Question about Cozy (W352E) Heater

1 Answer

The heater will not ignite properly

Info: Cozy Wall heater furnace
One side heater

Problem:
The thermostat is left at 60 degrees to keep the heater off. When the thermostat is set up to 75, the heater goes on for two seconds and shuts off.

If the heater is left alone, it continues to go on for two seconds and shuts off, over and over, or it may not go on at all. This lasts for 20mins to an hour. Eventually, the heater goes on and stays on.

If the heater door is slapped a few times, the heater will go on and stay on.

--The heater will not shut off
Once the heater gets going, it won't shut off. The thermostat to be turned back down below 70 in order for the burner to shut off.

Note:
There heater's Pilot generator was replaced last February 2007, and the heater appeared to work OK for awhile: it went on and stayed on when the thermostat was set above room temperature. However, the ignition problem soon returned (the heater had to be banged for the burned to stay lit), and it appears to be more pronounced this fall

Also:
This need to be answered too
The pilot flame goes out for some reason. What is the problem?

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  • 306 Answers

How old is the thermostat? Also there a limit switches at different points on that unit. If you have a volt ohm meter find the round disc like safety's and ohm them out. Take the wires off the disc before testing them. You should have a continuity should be closed they only open if unit gets too hot. Say something like 180 degree's.

A fast way to check out the thermostat is take a small diameter wire take the cover off the t-stat and jump across the R and the W on the t-stat. If the furnace comes on then t-stat bad. Let me know if this is helpfull. Ken

Posted on Nov 26, 2008

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1 Answer

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

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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.

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What is easy way to replace the thermostate in


Hi, that thermostat should be a wall mount. This heater has only 2 wires and any "Heat only", "millivolt" thermostat will work. Remove the old T-Stat and mount the new one on the wall, only 2 wires and less than a volt so no shock danger, doesn't even matter which wire goes where. Good luck and comment back if you need any help.

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I have a cozy gas furnace that only comes on when you bump it.


Hi loose connection in the heater or sticking fan or gas valve

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The heater will not ignite properly and the heater will not shut off


Judging by your pics (helpful, by the way) you have a high limit wired into your thermostat wire. Try disconnecting that wire nut connection in front of your valve and hooking the thermostat straight to the top and bottom posts on the valve (eliminating the high limit). If it runs fine, either the connection was poor or your high limit wire is pinched.

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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.

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