Quote:
Originally Posted by cabmando
Make sure to bump this thread when the tech looks the system over. I'd be curious to know what they find. I have to stick with the duct system being hosed since the furnace will work without the blower door on. I wonder if the drop duct that comes from the crawl back at the back of the furnace has that same insulation it in that the brilliant piece of duct fabrication pictured in post #62 has.
Only thing I think the altitude will affect is the size of the propane orifices used to convert the furnace. But I'm a lowlander so I can't say for sure.
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Unless there's a dead cat in the back there, I can't really see there being that much of an obstruction (after I've removed the oddball intake vents). I'd be sure to smell a dead cat. My wife dropped a paper towel in the vent when she was cleaning the intake and I found it at the bottom of the FAU right before the filter, so that's at least a small test that there is no "large" blockage in there.
Dunno - I thought for sure that cutting the intake hose and disconnecting it (getting it away from that kink from the wooden beam) would magically fix the problem, but it still complained about the motor speed in "test mode" and also while running (although it seemed to complain less after I shortened the hose - which makes sense - if the motor is getting older and more tired then "helping" it a bit by shortening the hose would make sense).
-Wayne