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well, gibson would be more of a lower level brand, but if it calls for ac and it blows cold, hes got the reversing valve right. otherwise it be heatin ya up. turn it to heat and raise the setpoint. blowing warm air? check. raise the setpoint at least 3 degrees higher than room temp and secondary heat should kick on. if its got sequencers, it will have up to a 5 minuite delay on stage 2 heat though. if its cooling good, he got the charge right...
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