Heil Furnace 1 year old

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Old 10-09-08, 06:06 AM
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Heil Furnace 1 year old

Furnace will not kick on blower fan not turning just getting a humming noise and pressure switch is vibrating like crazy. Diagnostic light is flashinhing 3 times "open pressure switch" would this stop the blower from turning? I've been told to check my PVC exhaust pipe for blockages, perhaps at the roof level perhaps a bird or bees got in there. sound correct? Could pressure switch have failed?
 
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Old 10-10-08, 07:01 AM
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Pressure switch is a pancake like control with hose/wire hooked up to it.. I can't see how that can be vibrating since it's not a motor.. Unless you got the that mixed up with the inducer assembly mixed up?


Anywayt could be blocked somewhere... shut it down, and get up on the roof and look into the pipes (Exhaust and intake) to be sure it's clear..

If it's clear from what you can tell. then at the furnace undo the intake pipe at the furnace (Hope the dealer did not glue it) look in the screen at the furnace/burner to see if it's clear and try it again. If it runs, then there is something down the line that may be blocking it that you could not see from the roof.

If that don't work, then the exhaust pipe or the inducer fan is the issue. I would not do anything with this till you do the intake side.

Is this furnace over or under a year? If it's under a year, call the dealer, it's under warranty.
 
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Old 10-13-08, 04:20 AM
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Ended up being a chipmunk got itside the PVC pipe on the roof and came all the way down into the blower motor...I can't believe they don't put some kind of screen into that PVC pipe prior to getting into the fan/motor? anyways the tech turned the fan with a screw driver until the chipmunks corpse got dislodged then reassembled and then it worked.
 
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Old 10-13-08, 05:12 AM
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Screens are normaly are not used on those due to risk of freezing than something getting into it. I've had more calls of screen frosted up and honestly, I've never had an animal call when I was out in the fields in the early 90's.
 
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Old 10-13-08, 06:28 AM
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Yes, I know of the problem with screens freezing up in northern climates but I was thinking more of a screen located right above the housing at the point where the PVC pipe enters the furnace. If this piece was see though that would be even better so you could see from the outside if anything had come down the pipe and lodged in or at the screen.
 
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Old 10-13-08, 05:24 PM
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Originally Posted by Gary154 View Post
Ended up being a chipmunk got itside the PVC pipe on the roof and came all the way down ....
How the heck did it get up the slippery pipe to get into it? How tall is the pipe vertically off the roof or chimney cap? I could more see a bat. But a chipmunk? Or, if a bird had it in it's talons and tried to store it? Huh.
 
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Old 10-16-08, 05:26 AM
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Don't know it's at least 3 feet higher at the top than the shingles on the roof below it. Doubt a bird stored it there cause it was dead stuck inside the fan assy. it would have never gotten there if it was d.o.a.
 
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Old 10-16-08, 06:59 AM
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1. I never heard of a chipmunk with any need to want to go up on a roof. And how did it get up there? And I can't see one scaling a 3 foot slippery pipe, and for what reason? They are a ground animal, unlike a squirrel who like roofs, attics, etc.

2. What would have stopped that chipmunk from sliding all the way down to the furnace?

Maybe it was not a chipmunk, but rather a baby squirrel. But even at that, it seems strange. But I would be more inclinded to believe that. Maybe a squirrels claws, especially a baby one, could climb that pipe, in search of warmth.
 
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