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Rheem Central Air united stopped working, no hum but power is there

I have turned down thermostate and waited. Nothing. Turned off breaker that feed the outside breaker and made sure no power. I checked the old breaker , seems okay and using my electrical power indicator the unit is getting power.

Furnace blower is fine.

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It looks as if the 24 signal from the thermostat is not getting to the contactor. Or possibly the coil in the contactor itself is dead. Or a third option may be a bad control power board in the condensing unit itself. If you feel comfortable reading through these devices comment back. PLEASE REMEMBER THERE IS HIGH VOLTAGE INSIDE THE CONDENSER AND A CAPACITOR.

Posted on Jul 06, 2008

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