Question about Kitchen Appliances - Others
I try to turn on my furnace and i get a flashing code
furnace wont turn on / pressure switch stuck open what should i do
Check the intake and exhaust plumbing for any obstructions. I had same issue, turned out to be ice in the air intake plumbing on outside of house. This may be the problem. The pressure switch can be tested by pulling hose from purge motor that goes to switch and applying a small amount of suction. The switch should make a clicking sound.
Posted on Jan 20, 2009
3 Flashes means pressure switch malfunction......had the same 3 flashes and when i changed the pressure switch all was well and good.
Posted on Jan 15, 2010
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Posted on Jan 02, 2017
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EACH OF THE FOLLOWING STATUS CODES IS A TWO DIGIT NUMBER WITH THE FIRST DIGIT DETERMINED BY THE
NUMBER OF SHORT FLASHES AND THE SECOND DIGIT BY THE NUMBER OF LONG FLASHES.
43 LOW-HEAT PRESSURE SWITCH OPEN WHILE MEDIUM-HEAT PRESSURE SWITCH IS CLOSED - Check for:
- Low inlet gas pressure (if LGPS used).
- Plugged condensate drain.
- Improper pressure switch wiring.
- Water in vent piping, possible sagging pipe.
- Stuck open low-heat pressure switch.
- Disconnected or obstructed pressure tubing.
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