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What is the power pile mv rating on mongomery word wall furnace model j- sfb-50171a ser-58039 ?

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Typicly "Thermopile" is anywhere from 500 to 750 Millivolts

Posted on Jan 05, 2009


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Having problems with 35,000BTU Williams Wall Heater. Have changed thermostats twice using the 986-1R. Heater not coming on when dips down to lower temp and not shutting off when on just keeps runnin

Wall furnaces operate on millivolts of electricity, about 750 mv which is only 3/4 of 1 volt, 1000 mv being 1 volt.

The electricity is created by a pilot generator that is in your pilot assembly, the pilot generator has a hot end in the pilot flame and a cold end that is not in the flame, this temperature differential is how the pilot generator creates the 750 mv or 3/4 volt.
As this is not much voltage, it is very easily disrupted by a patina on the connections, wires and terminals, I would clean them all shiny new, this often will fix it, if not try jumping the 2 thermostat terminals that the thermostat wires are connected to, this bypasses the thermostat and wiring so if it runs you know why it was not before. The pilot generator likely needs to be replaced, you can test the gas valve with a AAA battery with a wire taped on each end, then wire the battery to the gas valves terminals that the pilot generators wired to, this simulates a good pilot generator.

If the system operates via battery do not use it this way it is not safe as no pilot safety exists in case the flame blows out! gas will still flow due to the battery powering the heaters valve, it is for testing only, if it works by battery then the pilot generators bad.

Jan 07, 2015 | Williams Wall Heaters: 35,000 Btu/hr...

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Just need to know how to light the pilot on a Montgomery Ward wall furnace model sfb-50219

I can't speak to the specific model but with most pilot lights, there is a switch setting or button for lighting. If you release that switch or button too soon, the pilot will not remain light. Hold the switch or button ON while you light the pilot. Keep holding the switch or button for about a minute until the heat sensor is sufficiently warmed that the pilot light stays on. Good luck.

Nov 13, 2014 | Heating & Cooling

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Too much gas

It may be jetted for the other gas. Check the instructions. Did it work before?

Nov 29, 2013 | Empire Direct Vent Wall Furnace;...

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I believe all the Empire manuals are there to download or read at their website:

Nov 08, 2011 | Empire Direct Vent Wall Furnace;...

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I've got a 23 yr old 30DV3 whose pilot light works, and the thermostat & heating element seem to work, but not well. With the thermostat set at full hot, it just barely throws out any heat at all. ...

As I'm sure you already know, Empire Comforts Systems, no longer makes that model heater and hasn't for some years, now. I mentioned that, because if your unit needs parts, they may be almost impossible to get. In any event, there are a several things that may be causing the problem.

  • Low Gas Pressure - Burner is not receiving enough gas. Check for obstructions and have gas pressure at the unit checked.
  • Clogged burner or air intake (venturi valve) is partially clogged. Clean burner ports and venturi valve.
  • Gas line Shut Off Valve at heater not fully open. Check Gas line Shut Off Valve.
At 23 years old, you've gotten your money's worth out of this unit and it may be time to replace it. Empire makes several Direct Vent Wall Furnaces that are rated as High Efficiency Furnaces. In the long run, the money saved in fuel cost, would be worth installing a new one.

Hope this helps you solve the problem.

Apr 11, 2011 | Empire Direct Vent Wall Furnace;...

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Not coming on when i turn thermostat to desired level

Unsnap the cover plate to thermostat and see if control wires are on the front. If not you will have to remove two or three screws to remove base from wall. look for red and white wires or wires that are going to terminals marked r and w. Remove wires and temporarily touch them togetheter. If you hav power to your furnace this should mak it work.
If furnace works then you will need to get a new thermostat.
Good luck and thank you. P:S make sure thermostat is ser on auto and heat, BYE

Dec 24, 2010 | Heating & Cooling

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I'm trying to locate an owners manual for an old Montgomery Ward Wall Furnace, model # SFB 50175A C.

There is not much out there at all.
Try they may be able to help.
Hope this helps.

Nov 27, 2010 | Montgomery Ward Microwave Ovens

2 Answers

I am trying to find the output power, watts?

bad transformer. A $10 part at most electronic stores. U fried it when you dropped it. Happens all the time.

Jun 08, 2010 | Audio Players & Recorders

1 Answer

New Furnace Coleman Model 8623A Ser#037873318

Red wire to R. There may be a R, Rc, Rh, You will have either one or 2 of these. They shaould be jumped together with a small jumper from the factory. Then white to W, green to G and yellow to Y

Mar 20, 2010 | Coleman Heating & Cooling

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