Heating, Ventilation, and Air Conditioning (HVAC)

kdog422 · #1 (**permalink**) 09-15-2008, 03:44 PM

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?

icehouse · #2 (**permalink**) 09-28-2008, 09:15 AM

Sounds like a voltage problem. Check the relay coil connections for 24V.

SublimeMasterJW · #3 (**permalink**) 10-28-2008, 10:37 PM

Make sure all the connections to the electronic control board are tight and free of corosion.

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A/C cycling before kicking on

Heating, Ventilation, and Air Conditioning (HVAC)

My 3 year old central air unit is having problems. It has one furnace/AC unit with dual zones (thermostats