The first thing that you should ensure is that your thermostat has been set at a lower temperature than the room temperature. The switch should be turned onto ‘cool’. If it is possible to program the thermostat, make sure that it contains fresh batteries.
The next thing in the process of air conditioner trouble shooting is to check the power by turning the switch of the fan to ‘on’ from ‘auto’. In case, nothing happens, means that the control has been burned or the power has been disconnected. But, if the blower works, it means that the power is there. If your system employs a furnace for the purpose of creating heat, confirm if the emergency button has been switched on.
If you have knowledge about the circuit breaker panel or fuse, look for tripped breakers or blown fuses. Fix up the problem only once. If the problem reoccurs, it is advisable to call for a professional.
At the time of air conditioner trouble shooting, when the fan is directed to ‘auto’ and selector switch to ‘cool’, turn the thermostat lower than the actual room temperature. If the condenser doesn’t work, but blower does, examine circuit breaker panel. The problem may be with the condenser, if breaker is working properly.
Some of them may have a cut out at a high pressure. This is a button that is stuck outside the cabinet, normally close to the refrigerant lines. Press it inside as long as possible to rearrange it. If both the things are working properly and still there is no cooling, test the bigger copper line present in the condenser.
A warm copper line suggests that either the compressor has turned down or the system is not in function. On the other hand, a cool copper line means there is some kind of problem with the airflow inside like clogged filter and others. A lower charge of Freon also leads to freezing. Shut down the system and allow it to melt completely. In case, after air conditioner trouble shooting, it freezes again, look for a professional.