Hi was wondering if any can help.I have a keeprite High-Efficiency Furnace and I have on cool well came home today and the its was 21 in the house and the thermostat was set to 22 so the ac shouldn't be on.The furnace motor would turn on run for 10 seconds and shut off then about a minute latter it would do the same thing.So I turned the thermostat to off and the furnace motor turned on ran for 10 seconds and shut off.Anyone have and idea what's wrong?Thanks