I have a Inter-City CGC-75 furnace for the basement in my house. When I bought the house the I wasnt told the basment furnace didnt work. Upon inspection of the furnace I noticed that the motor was seized, So I replaced the motor thinking this was the only fix. Nope it isnt. When the thermostat calls for heat nothing happens at the furnce. If i push the white button in on what I think is the fan limit switch or turn the external fan switch to ON the burnner kicks in and the basment get warm. I only problem is the fan doesnt shut off till I shut the switch off. I have replaced the fan limiter but that is all so far.