I have a Janitrol Garage heater and have what I believe to be a fan/thermos tat problem. The unit's pilot lights fine, the unit fires up fine, after30-
45 seconds the fan comes on. BUT the fan runs for 10 seconds, shuts off for 15 seconds, comes on for 10 seconds, shuts off, etc etc. it'll do this for hours, after several hours once the garage warms, the unit will sty on. Ba d thermostat? any help is appreciated. (I bought this unit on Craigs list a nd owner said it worked fine previously)