My Furnace Works But My Air Conditioner Will Not Turn On - HVAC - DIY Chatroom Home Improvement Forum

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Old 06-28-2010, 09:55 PM   #1
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My furnace works but my air conditioner will not turn on

I have a goodman 2 part system i guess you can call it. Last year we had it serviced a new thermostat installed and the air conditioner worked better than ever.The furnace worked great all winter. Well summer is upon us again and now the air conditioner will not turn on. I changed the contactor the 24volt power supply and the capactor on the control board. Only the heat will turn on. Any ideas??


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Old 06-29-2010, 06:17 PM   #2
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verify 208V out on the disconnect keep in mind the 24vs comes from the furnace TR up thru the stat if the stat is call and you don't have 24Vs out at the contactor the stat is holding back the cooling call.check settings..if nothing pull the stat off and jump R to Y1 let somebody give you a yell back if the condender fan/comp starts...just qick jump it to bump it.if it bumps with the jump the stat in your hand is the problem.if you have 24Vs at the contactor in the condenser there might be a pressure control open..get back with results


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