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fsv1601
Jan 24, 2008, 04:42 PM
The induction motor comes on then the heat it's stay's on for two mines then cut off it short cycling all nights. Is this a bad pressue switch ,or abad board

hvac1000
Jan 24, 2008, 06:12 PM
Could be dirty flame sensor
Water in feed tube for pressure switch.
Dirty air filter
Out of calibration high limit control.
Plugged or restricted exhaust tube or flue
Thermostat may need heat anticipator adjustment

metzgr3257
Feb 15, 2010, 04:50 PM
I have a gibson, high efficiencey gas furnace that is short cycling even when the thermostat is not calling for heat. I have the t-stat set for 51 degrees in a vacant house and the room temperature is 55 degrees and the furnace is short cycling nonstop.