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Hello, its most likely a dirty flame sensor rod, or the condensate trap inside the furnace has mud in it and is not emptying to your condensate pump properly.
If you can give me the model number of the Heil furnace from its model number tag in the same compartment as the gas valve, I will see if I can pull the manual for you.
No problem on the call, its just our server programmed to make those offers.
That model number unfortunately didn't compute.
About how old is the furnace? Can you take close up exceeding well focused photo of the wiring diagram and attach it here? If you do I can mark it up with trouble shooting instructions.