A downflow Miller (CMF100) furnace is installed in a manufacturered home. The owner is south for the winter and the thermostat is set low. The furnace is cycling and not heating.
Here is what I think is happening - the fan is at the top (inlet) and the fan control is between the fan and the burner. The burner starts and when the fan-start temp is reached the fan starts. The fan blows cold air over the control which drops back down low enough to stop the fan.
Anyone seen this problem?
I can set the fan stop lower and/or the furnace start higher ond/or raise the temperature in the house (so the return air is not so cold).?.