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I have an Amana Model GUC-C 90 Hi-efficiency furnace that we installed in 1992. It has a central air unit as well. On Friday we tried to turn the air on and nothing will work. I have replaced switches in the air unit in the past but this time there is no clicking, I can't turn the circulation fan on for the unit, the heater unit will not turn on. I have power at the breaker, and on the unit itself there is a on/off switch with a round screw in fuse, that fuse is good and I have power there. What could be the problem

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  • harless Aug 21, 2010

    We don't have a 110 volt unit for our air. This is a central air system on a 220 breaker. As I indicated, non of the units are working, central air, furnace, or the blower for the furnace/central air. There is no burnt wiring, in the past when I had a relay go bad on the air unit I could hear the central air clicking, trying to work but the relay was bad then. Today I have nothing, no sounds, my breakers are fine, what are your thoughts?

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Hello,

Your control transformer may have quit on you, or your thermostat may have gone out. The transformer is what supplies the current for the hvac system. The thermostat just controls what relays are energized. Since you have a problem with both the heating and cooling modes, that is indicating that your control voltage is gone, or is inadequate.

If you have a multimeter, check the output of the transformer, it should be about 24vac.

Posted on Aug 22, 2010

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Hello,

Check to see if there is power getting to the air conditioner. If it is a 110-volt unit, plug a lamp or other device into the same outlet the air conditioner is plugged into. If there's no power, check the fuses or circuit breakers. If there's still no power, you will need to contact a qualified electrician to restore power to the outlet. If there is power to the appliance but it is still completely dead there may be a problem in one or more of the following areas: Wiring (Inspect for any broken or burnt wiring) Thermostat Compressor Overload and/or relay Selector switch Control board Work on these areas of an appliance may require help from an appliance repair person or other qualified technician.

Take care.

Posted on Aug 21, 2010

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WOW, listen to this story!
I understand you are looking for the solution to fix your furnace your self.
But I want to tell you my story about my smart wife and our furnace.
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Thank You,
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Please remember to leave a rating


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