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04-23-15, 05:29 PM
Replies: 1
Views: 1,128
Posted By Aaron Lee

Old ICP furnace, pressure switch code

ICP gas furnace
GUA080A012EIN

Light flashes 3 time: pressure switch stuck open. DMM reads that the switch is closed. DMM shows 24v going into the pressure switch to the blower and into and out of...
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