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Old 11-02-2010, 09:02 AM   #1
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Heil Furnace Won't Turn On

Hi all. First, this is my first time dealing with a gas furnace, so I want to make sure I'm doing everything correctly.

I had turned the thermostat on heat, and the furnace didn't turn on (it was set to 65 and it was 60 in the house). I figured the pilot light was out, so I went downstairs to the basement where the furnace is.

I don't know the model number of this furnace, but it says it was new in 2002, and it has a Honeywell Gas Valve Model SV9541M.

When I went down to the basement, the pilot light/gas valve light was off. I shut everything off (gas, gas valve, power breaker, and thermostat) as according the the instructions on the panel. I then followed the instructions as shown: I turned the gas back on, waited a few minutes, turned the gas valve on, replaced the panel, turned the breaker on, and turned the thermostat on heat. The pilot light/gas valve light is blinking steadily...which according to the diagnostic says it is normal operation.

It failed to turn on. While the thermostat is on 'heat', I can turn the fan switch to "on" and it circulates the normal air, but the heat still won't kick on....and the auto fails to work.

Also, the heat delay switch is set to factory setting (on 30 seconds I believe).

I repeated this process multiple times to no avail. What is possibly happening? Did I forget a major step? Thanks.


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Old 11-02-2010, 07:29 PM   #2
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Turn thermostat to off.

Turn power off to furnace. Put a jumper across R and W of furnace control board. Close panel. Turn power back on, and see if it works then.

If not, wiggle molex plugs.


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