If it's cycling on ac but not on gas something is keeping the heat from the flame from transferring to the boiler tube. Clean the flue and the soot off the boiler tube. Make sure the flue is vented to the top vent. If not the heat can build up behind the fridge keeping it from moving the heat from the coil to the outside making everything work harder.
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1998 37 ft Holiday Rambler Endeavor CDS
Cummins 5.9 275 HP 6 speed Allison Transmission
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