I have an ancient “Milwaukee Thermoflow” furnace that has the fan stuck on, whether it calls for heat or not (even if I turn the t-stat to off). The T-stat fan switch is on auto, not on. I checked the fan switch, and I changed the relay, but to no avail. So, I changed the whole control panel, and I still have the same problem. I also changed the thermostat completely. HELP!!! Someone please tell me the answer! I don’t want to pay the bucks for a new furnace or pay for a service call!!!