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Had a ac tech service central heating unit for the fall. Tech left and I left to do some errands . Now AC unit is not cooling its blowing warm air. I turned the circuit brks off and on inside and outside. I have also checked to see if unit was left on heater. thats not the problem. If I turn theAC on the fan does not turn on outside and there is no sound coming from the unit outside HELP!!! AC was working properly before this.

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It may not help but it sounds like the tech took a control wire for the cooling circuit loose at the indoor air handler/furnace so that he could bring the heat on to check it, and forgot to hook it back up. That may not be the case, but if it is it wouldn't be the first time. Due to the possibility of electrical shock, and the uncountable number of system configurations I wouldn't be able to tell you how to check it. Even the best tech's make mistakes, and if they have any integrity they won't charge to come back to fix.

Posted on Sep 02, 2010

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