Intermittent shut down 4 times/5 wks. Control board shows 4 blinks = "Pressure Switch Closed". Replacing access panel clears code & furnace works fine. Cleaned temp sensor & igniter. Pressure switch clicks & hose clear

Asked by Mick on 12/29/2010 0  Answer

ManualsOnline posted an answer 13 years, 11 months ago

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