Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 14, 2025 ...

hydro flame 8500-iv furmace 2002

September 14, 2016, 09:26:10 pm

I have 12 volt power to the circuit board which I just replaced and a new controller inside the coach. The furnace will not even try to light. I set the controller on furnace and set the temp. to 90 degrees and still nothing at all.  Need some help please.

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Re: hydro flame 8500-iv furmace 2002

Reply #1 – September 15, 2016, 08:39:02 pm

Does the blower come on

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Re: hydro flame 8500-iv furmace 2002

Reply #2 – September 15, 2016, 11:51:36 pm

Quote from: Twig – September 15, 2016, 08:39:02 pm

Does the blower come on

Can you get the blower to run? Do you have a manual? If so, check to see if the high limit switch requires a manual reset, ie pushing the button. This might prevent the control board from cycling and abort.

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Re: hydro flame 8500-iv furmace 2002

Reply #3 – September 16, 2016, 11:23:46 am

thanks for your input. nothing worked but now it does, it was the sail switch.

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Re: hydro flame 8500-iv furmace 2002

Reply #4 – September 16, 2016, 11:53:28 am

With a bad sail switch, the fan should run as normal.  But the "lighting cycle" will go no further.

And, while the sail switch may be bad, restrictions on the air return side or too many vents closes, crushed ducts, etc can all cause the same symptom, as air flow is insufficient to cause the sail switch to close.

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Re: hydro flame 8500-iv furmace 2002

Reply #5 – September 16, 2016, 11:59:10 am

Also forgot to mention the blue wire to the fan had a bad connection, Everything is working fine now. Thanks again.

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