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Coleman furnace diagrams 7966a856

I'm trying to find some parts for a coleman furnace with central air. The blowerwont run and there is power going into the transformer but none coming out. I have been told its 24 volts. I can't find any parts for it. Can someone help me find some tips or parts for this thing. I just bought the place and Im going up for a week and would really like the AC to work. Thanks everyone. Clay

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: Central air unit wont turn on

check the fuses

Posted on Jun 07, 2008

SOURCE: I have a Carrier 38tra048340

Blank screen sounds like a fried thermosat. Abrupt outages can affect certain types of thermostats. Make a jumper wire and jump across R and G. See if you get any action from anywhere. If a fan or compressor kicks in you know you have a burned out thermosat...

Posted on Jun 23, 2008

chillmaster
  • 104 Answers

SOURCE: coleman 7900 gas furnace/central ac,

Motor run capacitor. If problem is intermittent, try wiggling wires from motor to capacitor to check for broken wires. Motor might seem to work ok with no load on bench but it has no real power. The power to really spin the motor under load comes from the capacitor

Posted on Jun 30, 2008

  • 234 Answers

SOURCE: AC Control Transformer keeps failing.

well it has blown the fuse on the transformer, then you have coil switch bad.It could be the coil on the contath in for cooling.But can check by taking the yellow wire a loose and see if the don't blow. The red wire is one side of the transformer and the com could be any color.But look at the red wire because it is the main wire that travel the voltage throuhg the unit.

Posted on Mar 26, 2009

  • 308 Answers

SOURCE: The outside unit is not working on my Heil Air conditioner

The attic fan is not a part of your a/c system, and you should not run it while you are running the a/c. If you are currently using the attic fan, it is possible that someone wired it so that the a/c won't turn on while the attic fan is on. Otherwise if the thermostat is set below room temp, and says it is calling for cool, then the problem is most likely coming from an issue at the outside unit itself. Make sure to check your fuses, at the fuse panel and outside breaker. Hope this helps

FYI.. the only part of the system that might use batteries is the thermostat.

Posted on Jul 28, 2009

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1 Answer

Coleman 7900 gas furnace/central ac, was working fine, now blower wont come on, it tries but turns real slow then stops, i took it out and bench tested the motor andit works fine, put it back in the...


Motor run capacitor. If problem is intermittent, try wiggling wires from motor to capacitor to check for broken wires. Motor might seem to work ok with no load on bench but it has no real power. The power to really spin the motor under load comes from the capacitor

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