I have an Englander add on furnace model 28-3500 which is supposed to heat 3000 sq ft. it is hooked to the ductwork and does have a thermostat.. but it seems the blower kicks on constantly ever 15 seconds.. even when the house is warm.. (but my foyer is always cold). I just don't want this part to burn up.. Did you ever hear of this problem before.. Tks Toni [email protected]

Some furnaces have a fan switch that is adjustable to bring on the fan when heat is built up in the furnace and turn it off when the furnace cools down, this may need to be adjusted, good luck, Mike