1950's Furnace Gas Valve Replacement - Honeywell
I'm hoping for a miracle! I have a 1960's furnace that I had cleaned when I had my ducts cleaned. The furnace was working fine and then when the serviceman was finished my burner will no longer ignite. I am led to believe that something has gone wrong with the Gas Valve. It is a Honeywell and the size is 1/2, pressure is 8 oz, and type VS87A1X4X1 CO.
Does anyone have any suggestions where I might find a replacement valve or an idea of one that I may be able to install that would be interchangeable?
I sure don't want to replace my furnace if I don't have to. Besides being inefficient it worked so well!
Thank you,
LeeAnn
Comments
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does it have a separate safety switch you have to reset after you light the pilot?
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or just replace it with a millivolt combination valve… Which you already know
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Here are some pictures of the inside. The pilot light is on and the blower fan turns on. The burner won't ignite when the thermostat is turned all the way up.
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Did you press the red reset button after you lit the pilot? did you check the voltage from the thermopile?
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Did you ask the service guy what he did to break it?
NJ Steam Homeowner.
Free NJ and remote steam advice: https://heatinghelp.com/find-a-contractor/detail/new-jersey-steam-help/
See my sight glass boiler videos: https://bit.ly/3sZW1el0 -
You also have the manual main valve on in some pictures and off in others. it is on when the handle is parallel to the pipe
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Oh, and if you figure it out, once it is working watch the flame from the burner when the blower starts. The flame shouldn't change at all when the blower starts. If it does the heat exchanger is compromised and it is immediate replacement time for the furnace. Since the pilot probably went out with the duct cleaning I am concerned that the heat exchanger may be bad and the duct cleaning was sucking air through the fire side of the HX.
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I did not check the voltage. Is there a separate red button that I would push or is it also the red button used to light the pilot light?
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The pilot light is lit so that's a positive!
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Thank you. I was messing with it to see what happened with it on and off. Oddly enough when it was on the pilot light was smaller and when it was off the flame was larger.
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I did and he had no clue. He turned on the furnace when he arrived, turned it off to clean and service, lit the pilot light again, turned the thermostat up and burner would not kick on.
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The second step is to check the voltage of the thermopile with a millivoltmeter.
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You need to hold the button until the pilot heats the thermopile enough to produce enough current to hold the safety valve open and open the main valve if the thermostat is set to call for heat.
Do the test where you watch the main burner when the blower comes on to make sure the heat exchanger isn't leaking.
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