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03-29-2010, 09:55 AM
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#1
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Montana Fan
Join Date: Nov 2006
Location: Unknown
Posts: 436
M.O.C. #6570
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need furnace help
Furnace started acting up this afternoon. The blower started up then quit suddenly like it lost power (furnace did not ignite) and then clicks on and off rapidly. I took the access door off outside and shut it down out there but each time I try and turn it back on it does the same thing, fan on/off on/off on/off very rapidy and also I can hear a clicking sound which may be the from the electrical board. I have never heard of this problem before and not sure where to start.
Any ideas?
update: let it sit for about 20 minutes and turned it back on and it quit what it was doing and the fan started as normal but will not ignite, showing an ignition lock out code. I switched over to the tank I just filled but still no ignition. The other tank had quite a bit of condensation on the outside but was still 1/2 full.
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03-29-2010, 01:17 PM
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#2
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Montana Fan
Join Date: Aug 2009
Location: haverhill
Posts: 182
M.O.C. #9546
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Try a search for furnace codes, that might help you. I remember reading something similar to your problem.
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03-29-2010, 02:30 PM
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#3
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Montana Master
Join Date: Jul 2006
Location: K.C.
Posts: 11,731
M.O.C. #5980
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wow, two sets of symptoms, but the second set sounds like no propane, or a bad ignition, blocked pilot, or main burner. Could be a bad board. Would need to do a hands-on check.
Kill the low voltage to the unit, then try it.
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03-29-2010, 06:01 PM
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#4
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Montana Master
Join Date: Nov 2002
Location: Bakersfield
Posts: 5,316
M.O.C. #15
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Ozz,
You're the expert but sure sounds like a bad board. That is pretty much what mine was doing. We ended up getting a new board. No problems since replacement.
Good luck Phil and please let us know what the problem was.
Dennis
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03-30-2010, 04:04 AM
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#5
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Montana Fan
Join Date: Nov 2006
Location: Unknown
Posts: 436
M.O.C. #6570
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Went to bed last night with the ceremic heaters set to keep the 5er warm. About 10:30 the furnace cycled and ignited and has worked normaly since.
I did have a new circuit board and sail switch installed last December when we had problems then and it's worked great until yesterday.
I think it's possessed. LOL
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03-30-2010, 04:48 AM
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#6
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Montana Master
Join Date: Nov 2002
Location: Bakersfield
Posts: 5,316
M.O.C. #15
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Glad it is working again! But you are left with a problem of not knowing what the cause is.
Dennis
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03-30-2010, 12:39 PM
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#7
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Montana Master
Join Date: Sep 2004
Location: sioux falls
Posts: 1,835
M.O.C. #2121
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Phil, ours did the exact same thing and it turned out to be water dripping from the malfunctioning black tank flush onto the circuit board. As soon as it would dry out, it would work fine. We also replaced a circuit board, which did not solve the problem until Bob discovered the leaking check valve.
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03-30-2010, 01:46 PM
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#8
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Montana Master
Join Date: Sep 2004
Location: Leona
Posts: 6,382
M.O.C. #2059
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I had a problem with similar symptoms. It turned out to be the spark wire or igniter wire. It was arcing to the exhaust pipe and the spark was lost before it got to the fire box. I replaced the wire and made sure to route it away from the exhaust. I think heat from the exhaust prematurely deteriorated the coating on the wire. Haven't had a problem since.
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03-30-2010, 02:32 PM
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#9
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Montana Fan
Join Date: Nov 2006
Location: Unknown
Posts: 436
M.O.C. #6570
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thanks for the insight folks, I'll check out all those sugesstions.
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03-30-2010, 03:18 PM
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#10
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Montana Fan
Join Date: Aug 2006
Location: cottam
Posts: 318
M.O.C. #6133
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my furnace would not lite either .pulled the whole furnace out.took to a rv shop and did a bench check.it would not light for them ether.there is a sensor that checks the rpm of the blower for the right rpm before the furnace will light .the tech unplugged the senor and plugged it back in tested it a dozen times and worked fine.could not get it to fail.no charge. the furnace has been working fine since.try unpugging that sensor clean the connection.hope that hopes
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