View single post by winenotwhine
 Posted: Wed Nov 29th, 2006 01:03 am
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Joined: Thu Dec 8th, 2005
Location: N. California
Posts: 75
I assume it's an upflow unit since the heater is located in the basement and delivers air to the two floors above--the return air vent is on the second floor.

The diagnostic chart says three blinks means the pressure switch is stuck open.