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Thread: Williams Wall Heater questions
01-16-2013, 04:42 PM #1
Williams Wall Heater questions
i have a williams wall furnace that a customer is wanting to get going again, hasn't ran in probably over ten years.
the model # 35GV-5 s# A47820
Does not look like it has a blower assembly, the only wall heaters i've dealt with in the past have had blowers that come on to heat the space. it has a mv generator gas valve. pilot will come on and stay lit, turn knob to on position. the wires go under the slab to a remote t stat i would imagine but that's long gone. jumpered the two terminals that would be made if the t stat was calling but main burner never would come on. so i'm assuming that either my pilot generator is bad or the gas valve is bad or a combination of both since it's been inactive for so long. i didn't measure mv will tomorrow. just curious what that reading should be. and also if this model is designed to not work with a blower. thanks in advance.
01-16-2013, 10:34 PM #2Professional Member*
- Join Date
- Jul 2010
Are there any limits that could be failed on this furnace. Usually if a pilot generator is bad your pilot wont stay on at all as you release the pilot button
01-17-2013, 07:24 AM #3
Could have a limit switch that is open. Check MV under load, should be at least 300.Contractor locator map
How many times must one fix something before it is fixed?
01-17-2013, 08:15 AM #4
300. Cool. That's what i was looking for.
01-17-2013, 11:03 AM #5
Check your email, I sent you some info.
01-17-2013, 11:19 AM #6
Edit il msg you, don't realize it was open
01-17-2013, 04:32 PM #7Professional Member*
- Join Date
- Sep 2003
One thing to also look for is a spider web in the burner orifice
especially if you have the proper mv's and you think the valve is opening but no burner ignition.
The spiders crawl into the orifice and spin a web . Spiders love these heaters
So just taking out the orifice isn't good enough sometimes you have to fish a wire thru the
01-17-2013, 08:58 PM #8Professional Member
- Join Date
- Feb 2004
Hasn't run in 10 years, heck yes there is a spider in there
01-18-2013, 06:31 PM #9
Went back to check, low mv signal, told customer price and they said nopie, which i was glad to hear. They ended up covering the hole and mounting heater on the wall in front of it