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HVAC Guru
HVAC Guru, HVAC TECH
Category: HVAC
Satisfied Customers: 14390
Experience:  15yrs in the HVAC industry with certificates and degrees.
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I have a carrier hvac system,installed in 1996,my problem is

Customer Question

I have a carrier hvac system,installed in 1996,my problem is ac runs for 15 sec and off for 15secs.the repairman has replaced the 'mother board' and the thermostat, system worked for a while , its now back to on agin and off agin.i have the repairman coming back but they don't know what to do next, can you help
Submitted: 1 year ago.
Category: HVAC
Expert:  HVAC Guru replied 1 year ago.

Hello, can you see if you are losing 24 volts at the contactor on the AC unit outside? You need a volt meter and have to physically be there to watch the meter when it turns on and off.

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