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View Full Version : Furnace Pressure switch Code


u242447
Jan 3, 2010, 07:21 PM
York Single stage This is the third winter its been running. The last two winters no problems. The control board fault code red light blinking three time which means pressure switch fault the unit will run up to a week with no problems and then it will shutdown with just the blower running I checked all the tubing on the pressure switch no water the condensate drain is draining Any help Thanks