Gas and Oil Home Heating Furnaces - More info on coleman unit.

I have a Coleman central heating and A/C unit. Regardless whether in cooling or heating mode the blower will continue to cycle on and off about every fourty-five seconds after reaching desired thermastate setting, and remain on only a split second before shutting down once again. :confused:

A little more info would surely help. What kind of heat, electric ? Whats the position of the fan switch on the stat when this happens ? Package or split system ? You say that it ONLY happens after stat satisfies ?

My unit is a package deal, not split, and on natural gas. The switch you referred to is in the auto mode. After the unit has reached the temperature setting, the unit stops as it should but the blower fan continues to go off and on about every minute and stays on only a second or two, Until the temperature drops and once again the burner comes on and the unit runs like it should. Other than the on then off again of the blower fan the unit seems to work fine.


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I'm not familar with your Coleman a/c with gas heat but it sounds like the switch that operates the fan in heating is either out of adjustment, defective or its sensing element has gone kaput.The switch could also be in a printed circuit board but its element would be external. The heat sensing element will be located somewhere in the plenum , sensing burner heat.