We have a Model # 3003622 Williams Gas heater. The pilot light went out during a snow storm and won't stay lit. Though we have 20 mph winds, we normally have high winds which hasn't affected this in the past. There is significant ice build up on the outside vent as well. Could the ice be hindering the pilot from staying lit? thanks Molly

See if it visually the same as what you have. All parts for yours are obsolete.

Williams Furnace Company P322398 Pilot Generator ...

https://williamsfurnace.parts > williams-furnace-compan...
Natural Gas Model numbers include 1403822, 2003822 and 3003822, and can be used with all altitude options. Click here to download the replacement parts lists ...

US$65.55 · ‎In stock

https://www.searspartsdirect.com/model/ydhrgebuqn-001203/williams-3003622-wall-heater-parts

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It sounds like there may be an issue with the gas valve or the thermocouple on your Williams gas wall heater model # 5009622. The fact that the pilot light will not stay lit and the burners came on and went off after cleaning the thermocouple, suggests that there may be a problem with the gas valve or thermocouple. Additionally, the fact that the pilot light went off in the middle of the night, it could also be a sign of a problem with the thermocouple.
Possible causes for this issue include a malfunctioning thermocouple, a faulty gas valve, or a problem with the voltage to the gas valve.
Here are some steps you can try to fix the problem:

1. Check the thermocouple: Make sure that the thermocouple is properly installed and that the wire connections are secure. Also, make sure that the thermocouple is clean and not corroded.
2. Check the gas valve: Make sure that the gas valve is functioning properly and that it is sending gas to the pilot light.
3. Check the voltage: Make sure that the voltage to the gas valve is correct and that the wiring connections are secure.
4. Check for leaks: Make sure that there are no leaks in the gas line.
5. If the problem persists, it's best to contact a professional HVAC technician or the manufacturer for further assistance.

It's important to note that working with gas appliances can be dangerous, if you're not comfortable working with gas appliances, it's best to get it serviced by a professional.

What you have is a Direct Vent, Gas WALL Heater. It is normally mounted about 6" off the floor on an exterior wall (since it has to be direct vented out). Not sure what the red and white wires are for, but suspect it's for the optional thermostatically controlled blower connection.

In any event, to help you install this heater properly, I have included a link to the Owner/Installation Manual, which should provide all the information you need to complete the installation correctly.

http://shopfnc.com/pdffiles/williams2man.pdf

You can download and print the manual for future reference.

I'm having the same exact problem... At first we thought was the vent... but the way the flames goes out... it seems that there is "not enough oxygen" more than "blown out by the wind"... right after both main & pilot goes out, I can't even light any external flame inside the chamber... and it doesn't feel like the outside cold air coming in... it just feel like there is some sort of gas in the chamber that's so strong, it prevents flame... and the only thing I can think of is that it doesn't have enough oxygen, but too much natural gas, and flame can't sustain.

Assuming the pilot is lit, try jumping out the thermostat wires where they come into the valve. A paper clip would work. If it works, the problem is in the t-stat circuit.

Lets start with safety. Check your vent pipe for obstructions, mainly outside at the vent cap. The safety of this unit will not allow it to operate if there is anything blocking the vent. If all is OK, then next we will light and observe the pilot with it on the pilot setting on gas valve. The pilot flame should consume the tip of the generator point by 1/2 to 5/8". If it does not, then screw off the pilot adjust screw cover on the gas valve. This is clearly marked on the top of the valve. Inside you will have a much smaller screw. Turn it counter clockwise to raise the pilot level, clockwise to decrease. Never consume more than 5/8" of the generator tip. Hopefully your problem will be resolved here at this step. If however it is OK, then take a millivolt meter and read the generator millivolts, at the gas valve with the thermostat contacts closed. It should read 140 millivolts. You need this much power to properly operate the heater. If it is lower than 140, then replace the pilot generator....Rob Just a note...Do not remove or take apart any part of the Gas valve, other than the pilot adjust screw cover...Good Luck.

THE flame from the pilot should shoot past the thermo-couple and heat this up and make a small amount of mili- amps to prove the pilot light is lit. ..So if the flame doesn,t go past the thermo-couple it won, make mili-amps or its tme to change out the thermo-couple, They only cost lest than $8:00 and you can change it!

You will first need to turn the control knob to pilot. Then depress the control knob button and hold it. Then press the push button piezo igniter several times until pilot lights or open pilot inspection cover and manually light pilot with match/lighter. You may need to hold the control knob for at least a minute. Then release the control knob and if the pilot stays lit then turn the control knob to on. If it does not light then repeat the process again.

Find the gas valve and turn it to pilot. (Or light) Use a long reach lighter. Light the lighter and press the knob in. Light the pilot and continue to hold the knob in for about 15 seconds. When you release it, the pilot should stay lit. If it doesn't, you need a new thermocouple. That's the small tube that the flame touches when the pilot's lit. They're inexpensive and usually not too hard to replace.

The Pilot indicator will appear to line up with the arrow on the base, and even push in as though allowing gas to flow, but if it is just 1mm out of alignment, no gas will flow. So the solution is to move the valve in the Pilot mode slightly in one direction or the other to see if/when gas flows.