Rank: Member
Groups: Registered
Joined: 9/15/2008(UTC)
Posts: 1
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My 3 year old central air unit is having problems. It has one furnace/AC unit with dual zones (thermostats upstairs and down). When the AC starts up the outside compressor starts right up but the main furnace/blower unit kicks on and off about 6 to 8 times before it stays on (on for a second or two, off for a second or two). I'm told it could be a relay switch. Any other ideas? If it is a relay switch can a handy guy replace it himself?
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Rank: Advanced Member
Groups: Senior Expert
Joined: 9/1/2008(UTC)
Posts: 440
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Sounds like a voltage problem. Check the relay coil connections for 24V.
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Rank: Advanced Member
Groups: Senior Expert
Joined: 5/6/2008(UTC)
Posts: 724
Was thanked: 1 time(s) in 1 post(s)
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Make sure all the connections to the electronic control board are tight and free of corosion.
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