I got a 5 year old cozy heater floor model that will work great until it gets cold and it won't kick on I've replace d the thermostat and it worked good then the same thing happened again

SOURCE: Ward Heater Company M0021

These old units have a simple gas valve and a separate regulator. Your best bet may be to replace the gas valve to something more modern. Trouble shooting this most likely be a waste of time, as parts probably aren't available, other than the thermostat. by-pass it, (connect the 2 wires together) and see if it comes on. The blower shouldn't stop the burner to come on. Sounds like the gas company doesn't want to crawl under there to light it.

SOURCE: Goodman furnace

sounds like the fan switch in the furnace is coming on and off. This is common for Goodman. or could be the heat anticipator on the t-stat. While there are several reasons this happens these are the most common.

Guy

SOURCE: I have a W355F Cozy wall heater. I lit the pilot

I would take out the new stat and return it.Just because it was new doesn't mean it didn't have a factory defect. I see this all of the time buying a/c and Heater parts that I have to return for credit.
Good Luck, Shastalaker7
PS It sounds to me like you know whats up.Sincerely, Shastalaker7

SOURCE: Cozy wall furnace (propane) does not respond to

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.

SOURCE: Portable Heater keeps turning off

I just fixed my Stanley Lasko 675900 FOR GOOD and would like to tell the world how to fix it!

1. Remove the front plastic grill. The bolts are torx heads with a center pin. You may be able to find a torx head driver with the center pin but I improvised. I Used a dremel tool with a small rounded diamond bit to grind the center pins out of each screw so I can use a standard torx head driver on the screws.
2. Remove the heating element. These should be Phillips screws.
3. Blow out the dust from the back side of the heating element. (be careful with the fragile fins)
4. put it all back together and it should work just fine.
5. (optional at your own risk!) I believe the small gadget attached to the top of the heating element with the white wire is the limiter. You can use pliers to slide the unit out of the element and either move the unit further toward the center area, or cut the device out completely with wire cutters and then splice it back together. If you do this REMEMBER TO CLEAN THE BACK OF TH HEATING ELEMENT EVERY MONTH TO PREVENT A DUST FIRE!

I hope this work for you and good luck!