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Amana 80 SSE air command gas furnace  Rate Topic 
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 Posted: Sun Mar 29th, 2009 08:39 pm
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applianceman18007260692
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Control board gives 3 blinks. Service manual says draft inducer blows constantly and pressure switch stuck open. One problem, the draft inducer motor does not run. It has continuity and turns freely.  All the rollouts and the plenum limit is good. The fuse in the board checks good.  Model GUICO70FA30 It is my 81 year old mother's furnace. It is 3 years old and barely out of warranty. What have I missed guys? It it the control board?



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 Posted: Sun Mar 29th, 2009 10:07 pm
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Cactus Bob



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first  did you check at the motor connector for 110v when you think the motor should be running ?  do you hear a relay click on the board when you power it up ?  did you remove the board and check for a bad or melted sloder connection  ?  you may have a bad relay on the board , missing ground ( common) on the board or motor .  if everthing checks out  you need a board , it does not happen that offten but it  happens  .  no magic bullet here



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 Posted: Sun Mar 29th, 2009 10:30 pm
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applianceman18007260692
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Thanks cactus.The relay clicks when you turn the heater on but the DI never fires up which is what you hear when the sytem fires up. We had a bad storm system go through here friday night. Lightning struck the transformer down the street that affects the 4 houses down from mom's. Power went out the instant it hit. But the heater was not on at the time and we had no other things goes out. And she has had intermittant problems with it since mid march.



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 Posted: Sun Mar 29th, 2009 10:50 pm
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Cactus Bob



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sounds like a bad solder connection to me .  if not its the relay contacts  . unless your like me and "recycle" good relays from every old board you can . you will need a board



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 Posted: Mon Mar 30th, 2009 10:52 am
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Budget Appliance Repair
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Why don't you hook a test cord up to just the draft inducer motor to make sure it is good and rule it out as a problem.

Even if the heater wasn't on when the pole transformer got hit it could still have taken something out on the board.  Usually it's the 24volt transformer and/or varistor but if you get the flashing trouble light I would think the 24volt transformer should be still ok.



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 Posted: Tue Mar 31st, 2009 01:26 am
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applianceman18007260692
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No power to the DI. Board ordered.I will let yall know.



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 Posted: Sat Apr 4th, 2009 12:36 am
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applianceman18007260692
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Board replaced. Heater working. Mom's happy.



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