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Re: Where can i get a thermocouple for a 400dvx williams...
You should be able to get a universal thermo couple from most gas appliance suppliers they come with a range of fittings to adapt to most if not all gas aplliances
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If you mean that the pilot light does not stay lit, you could have a bad thermocouple or a loose connection at the gas valve. Make sure the flame is against the thermocouple. If you mean that the pilot won't light at all, bleed out the gas line a bit more.
Remove the thermocouple and take a pencil eraser to the hole. Clean the corrosion out the hole. Reconnect the thermocouple tight. The tip of the flame must hit the tip of the new thermocouple. If the flame is hitting the middle of the thermocouple that is called wash through (no good) The bimetal tip of the thermocouple is made of nickel and copper layered. When heated it produces millivolts. This holds the electromagnet in and that is your safety feature. Thank you Ralph Nader.
Hi,
The thermocouple is bad and needs to be replaced...
The thermocouple is the copper rod that sticks up into the pilot flame and then screws into the gas valve...
they are sold by lentgh so you need to measure the old one when you go to buy a replacement...
Hi, how did you test the thermocouple? My problem is that once the heater is fully on (pilot + full flames going) it totally turns off in 3-10 minutes. Then, I have to go through the sequence of relighting the pilot light, etc. I thought it was the limit switch rollout, but I tested that under various conditions, including within a minute after the heater completely turned off by itself.
Hi, The problem is with the thermocouple.... this is the metal thing that the pilot flame hits when it is burning....if the flame is not hitting it then it does not get hot enough...
make sure the flame is hitting it....if not then adjust the hood over the flame to get it on the thermocouple...
If it is hitting it then replace the thermocouple....for that heater though the thermo is probably and OEM part and may have to be bought from the manufacturer...
Power should be shut off at the breaker. Check with a meter before disassembling wires. The gas line gas valve will be at 90 degrees of the gas line when off, however to make sure, try and start the unit with the gas valve at 90 degrees. Remove the front cover of the unit and look for mounting bolts. From the outside, remove the vent screws. The unit should lift off its mounting bracket and slide toward you.
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