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Heats up and shuts off

Wall heater willams 3509622 heats up then shut down pilot too. i change the thermocouple all ready

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Re: heats up and shuts off

There are 2 things to check. First is the thermostat. Next is the thermal safety switch located up on the heat exchanger. by-pass these one at a time by connecting the wires together. If that solves the problem, change to a new one. If neither one of these items are bad, you need a new gas valve.

Posted on Dec 31, 2007

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My Kozy World nat gas wall heater has worked beautifully for the past three winters. I cleaned it this morning with canned air, got all the dust off the ceramic plates, blew out the burner inlets, blew out...

Does the pilot light stay lit if you continually depress the control valve?
If the pilot light stays lit as long as you keep the valve depressed, then the problem is the thermocouple is bad. The pilot light makes enough electricity via the thermocouple to hold open the gas valve that feeds the burners. If the thermocouple fails to produce that electricity, the gas valve will shut down and switch off the gas flow to the whole unit.

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Dyna-glo wall heater seems to have mixture problem pilot shuts off after every heat cycle pilot is three inch long yellow flame

yellow flame ng and flame should just cover last third of thermocouple if so equipped. (to much pilot pres.)

Nov 15, 2012 | Dyna-Glo Heaters

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Sounds like a weak thermocouple. With the extra heat of the main burner running it can keep the pilot solenoid open...without it it fails shut. Try replacing the thermocouple. (small rod the pilot flame burns against with a skinny copper tube going to gas valve).

Jan 04, 2010 | Heaters

1 Answer

Pilot light lights but when turnd on it does not get hot and shuts off in 1or2 minuts

This is normally caused by the thermocouple. This is the part the pilot light heats up to let the heater know the gas is on and the pilot light is lit. The heater will shut off if it thinks the pilot light is not lit for safety reasons. You will need to change the thermocouple for it to work again correctly.

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Pilot flame moves off thermocouple when main flame

You must get the dust out of the ODS chamber that builds up during warmer months. If you go monkeying with the flap it will quit altogether. I use a simple squirt of rustbuster into the pilot, let it dry and all is well once more. You can get rustbuster at ace hardware for $2

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3 Answers

Unit shuts down after 1 or 2 min.

Yeah, I've got a solution. SHUT OFF YOUR GAS SUPPLY VALVE FIRST!!! If your pilot won't light or if it lights and kicks off soon then check the orifice. I've got a 30,000 BTU LP gas unit. when my pilot did light, the flame was not totally encompassing the thermocouple nipple which lies behind the sparker/igniter furthest away from the flame. It cause the thermocouple nipple to cool too much and shut off the unit. I took the unit off the wall. I undid the four screws on the back of the unit, which holds the glass front plate. Then I took apart the multi-sectioned brass piece that is attached to the gas feed line for the pilot with a 13 mm and a11mm open end wrench, or you can use a small adjustable and a set of pliers. The second brass piece, the 11mm one, from the gas feed line, is the orifice. It has a tiny little hole in the center. I stuck a pin in it and cleaned it out from some debris that had clogged it. You do not have to take off anything else but those two pieces going from the gas feed tube. I put it all back together and I'm back in business. Now if you do this and it still doesn't work, buy a new thermocouple. They're cheap. Somewhere between six and ten bucks last I looked, Honeywell makes them and they fit most gas units besides Glo-Warm. Have a nice Day. Cadge

Oct 10, 2009 | Desa International Blower Glow Warm Wall...

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Natural Gas wall heater

It sounds like the thermocoupler is either not adjusted into the flame properly, or you may have gotten a bad one. The thermocouple is the main thing that makes the pilot work.

Dec 22, 2008 | Dyna-Glo D-E36 Infra-Red Wall Mounted...

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Wall furnace troubleshooting

A thermocouple is inexpensive.  Replace if in doubt.  Get a professional in to do safety checks.  You may also want that individual to replace the thermocouple.

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2 Answers

Heater shutting off

this type of heater is very sensitive to the state of the pilot since it uses a Renni type thermocouple to sense a low oxygen situation. Usually the pilot needs to be cleaned. If that does not restore operation only other thing to do is try replacing the thermocouple.
A low pilot will usually hold for a few minutes so I would expect that you have a bad thermocouple.

Nov 17, 2008 | Desa International Blower Glow Warm Wall...

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