Question about Heating & Cooling
You probably have an airlock condition and need to release the vent to let trapped air escape but be careful when doing this steam can cause severe burns.
Posted on Nov 15, 2008
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Posted on Jan 02, 2017
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May 11, 2014 | GMC 2000 Sierra 1500 SLE
Nov 06, 2012 | Heating & Cooling
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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