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Williams Gas Heater Mod.# 3501912


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11 replies to this topic

#1 jumptrout

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Posted 29 December 2011 - 05:44 PM

I got a call today on a Williams Gas Heater mod.# 3501912.
Bad thermocouple.
This is not a common brand heater in my area.
I am unfamiliar with the procedure to access the thermocouple for replacement.
Does anyone here work on this model/brand of heater and can suggest the correct way to remove the thermocouple.
If you know this heater you know what I am talking about to get a wrench on the thermocouple.

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#2 RegUS_PatOff

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Posted 29 December 2011 - 10:56 PM

all I could find
Williams Gas Heater
Installation & Operation Manual
Hearth_Heater_Enclosed_IOM.pdf
.

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#3 jumptrout

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Posted 30 December 2011 - 08:36 AM

Thank you for the manual.
It thoroughly covers everything except what I need.
A call to Williams tech support is in my future.

#4 Dan Webster

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Posted 30 December 2011 - 03:08 PM

This is what it looks like. Click pic to enlarge. Standard 18 in thermocouple you should have in your truck stock. Let me know

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Edited by applianceman18007260692, 30 December 2011 - 03:10 PM.

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#5 jumptrout

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Posted 30 December 2011 - 04:39 PM

No it is not a standard thermocouple. It has a damper sensor made into the thermocouple.
I have the thermocouple.
The problem had to do with accessing the pilot assembly to change the thermocouple.
I got it done.
Had to remove the gas valve,the burner,then remove the gas lines from the valve and burner just to get the thermocouple pilot assembly were it would clear the heat exchanger just enough to remove the thermocouple.
Any other heater it is a 15 minute job.
This one took 2 hours.
BUT. It is done and working good.
If I had to do another like it,I could do it in an hour and 45 minutes.

#6 Bobice

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Posted 30 December 2011 - 04:55 PM

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#7 Dan Webster

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Posted 30 December 2011 - 08:40 PM

Just tried to look up the model number of the heater at sears without any luck. Tried to look up a photo of the thermocouple in you mentioned without success. Do you have the part number? I have seen thermocouples with junction blocks on them; this thermocouple must be something new.

Edited by applianceman18007260692, 30 December 2011 - 08:42 PM.

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#8 jumptrout

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Posted 31 December 2011 - 05:54 AM

p322391

#9 RegUS_PatOff

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Posted 31 December 2011 - 09:42 AM

p322391

as listed in the Installation & Operation Manual that I posted
3501912 Thermocouple P321828
.

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#10 Dan Webster

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Posted 31 December 2011 - 12:55 PM

Jumpy the part you listed is a junction block thermocouple. The thang that they talking about is obsolete and I never heard of it or even seen one so that tells me it was probably crappy design to begin with. Usually the p322391 connects to a fuse that looks like this:

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Edited by applianceman18007260692, 31 December 2011 - 12:57 PM.

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#11 jumptrout

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Posted 03 January 2012 - 09:15 AM

http://www.johnstone....ep?pID=L39-078
This is it.

#12 jumptrout

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Posted 03 January 2012 - 09:45 AM

as listed in the Installation & Operation Manual that I posted
3501912 Thermocouple P321828


BTW Reg. Johnstone Supply crosses the p321828 over to p322391.




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