Having problems with your Air Conditioners ?

Air condition. not cooling the house

\015 There is cool air coming from vents, not strong. and the fan is working outside. set thermostat on 70 and it shows it is 85. have to set thermostat on 60 to barely get it to 75, it never quits running, to stop it i have to turn unit off or set thermostat to 90 is it my thermostat ( it is the older ones with the mercury) or does my unit need to be charged?\015

Answers :

There is a possibility that though the outdoor fan is running, the compressor inside the condensing unit is NOT running. That would also explain continual operation without a satisfactory drop in indoor temperature.
\012It could be low on refrigerant which can cause the compressor to overheat and shut off on its internal overload but the outdoor fan would continue to operate normally fooling you into thinking the compressor is running.
\012It could be a burnt wire on either the compressor or on the contactor that's not allowing the compressor to start or it could be a 'shorted' or 'open' capacitor that's caused the compressor to overheat.
\012If the outdoor coil is impacted with dust, lint, grass clippings or other debris it could be restricting the airflow across the coil causing it to overpressurize and shut the compressor off on a 'manual reset' high pressure switch.
\012And then, another cause could be a low refrigerant charge requiring a leak test, repair and recharge.
\012...and like the other good suggestions, a good cleaning of all components will never do any harm.
Both evaporator and condensor, indoor and outdoor coils need good airflow thru them for cooling. The outdoor coil can be hosed clean with water. The thick copper line that returns refrigerant gas to the compressor should get cold, sweaty cold. If the coils are clean and the return line to the compressor is not cold, then it may need recharging with refrigerant after leak checking.

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