Question about Williams 1403622 Gas Compact Heater

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Pilot will not light

I installed a willieams 1403622 gas heater last year, and it operated fine. At the end of the winter season, the pilot valve and supply line valve were shut off. This year, when I turned on the supply line valve and pilot valve, then went through the pilot lighting sequence(several times for several minutes to let gas flow) the pilot would still not light. Any suggestions?

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It's probably the thermocoupler. It went out several times on my Williams though it has been working for quite some time now. Anyway, the thermocoupler is the copper tube coming out next to the pilot knob. It goes into the furnace area and has a tip that hangs near the pilot light, measuring temperature and suchforth. Anyway, they go bad and the pilot won't stay lit. Make sure you get the right length (bring it in with you -- normally it's 18" but could be longer).

You may have already fixed this, but I hop this may be helpful.

Posted on Dec 16, 2008

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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.

Posted on Nov 07, 2008


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We just purchased a Williams 1403622 natural gas heater and installed it yesterday. However, the pilot light WILL NOT light. Can you help?

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.

Mar 07, 2011 | Williams 1403622 Gas Compact Heater

1 Answer

Williams 1403622 pilot will not light. The heater is 2 years new.

You will need to replace thermocouple it's the small bulb in the pilot flame it has a copper tube that runs back to the gas valve here is a manual for that unit it shows the pilot head and thermocouple




Nov 25, 2010 | Heating & Cooling

1 Answer

How to turn on pilot light
Here is the installation manual that includes a section on how to light the pilot on your specified Furnace "Williams 1403622".
Let us know if this was helpful to you. Good Luck in your endeavor. :-)

Mar 04, 2010 | Williams 1403622 Gas Compact Heater

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My fireplace pilot lite wont stay lite

There is a valve which you are bypassing when you press the pilot button. It is usually a sealed hydralic valve which holds the gas on as long as a flame is on the bulb. This expands the fluid and keeps the gas valve open. If the bulb moved and is not in the flame, or near enough, it will not stay on. Also since it sat for a year the internal workings of the valve could have "gummed" up. You need to replace the valve. You did not mention the name or model of the unit. Do a search with your units brand name followed by heater followed by parts. This should return dealers who can supply the part you need. Let me know if you need anymore help.


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Feb 25, 2010 | Desa International Unvented Gas Space...

1 Answer

I dont know how to light the piolet

there should be an access panel on the bottom of the heater, it should open easily, don't force it,you'll see the gas valve on which is a knob, it says off, on, pilot,there also should be lighting instructions inside the panel, if not, find where you light the pilot, then find the pilot on, it will be a button on the valve or when you turn valve to pilot it will push in,now turn valve to pilot,lite pilot,push button/valve,hold 15 SEC

Jan 31, 2010 | Williams 1403622 Gas Compact Heater

1 Answer

Pilot hard to light

The pilot light could be dirty...which makes it smaller and thus takes a lot longer to heat the Powerpile ...the pilot should be BLUE not yellow or yellow tips and should fully envelop the Powerpile element in the pilot,,,if it looks small and dirty....try tapping it with a screwdriver...this loosens the dust and usually increases the size of the pilot....becareful to put the logs back in exactly the poosition described in the manual to eliminate Carbon buildup and a potentially dangerous condition

Oct 20, 2009 | Heating & Cooling

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