Troubleshooting an air conditioner system means getting to know the process by which the appliance works. You should already know where the air filter is located and how to access the outside condenser unit. Knowing the regular sounds your air conditioner makes when running at peak efficiency will better facilitate known when the air conditioner begins to behave badly.
Check for a blown fuse or a tripped circuit breaker if the air conditioner will not run. Make sure that the thermostat is in the ON position as well as making sure that the temperature has not been raised.
Test the compressor motor for continuity. Set a multitester on VOM on RX1 and touch the problems all the possible pairs of terminals situated inside the compressor motor. The readings for all pairs should be low ohms.
If the outdoor compressor is running without stopping, check for a faulty thermostat. If the thermostat checks out, head for the air filter. Replace the air filter if it’s dirty or turn off the air conditioner and wash a reusable air filter if you have that type. Clogged evaporator coils or clogged condenser coils can also contribute a compressor failing to stop.
An air conditioner that is constantly cycling on and off can mean the thermostat isn’t working properly in which case it will require repair. Another reason for the air conditioner to short cycle is that the condenser coils are clogged. A faulty condenser fan motor will also bring on a short cycling air conditioner.
Intermittent or uneven cooling can often mean nothing more serious than that the duct register in or more rooms has been closed. If the forced air of a furnace system can’t make it into one room thanks to a closed-off vent, it will send that much more air through the open vents. Open all registers if you want uniformity of coolness throughout the house. Close registers if you want to direct intense cool air to the room you plan to occupy. Another cause for poor cooling is a loose or broken blower fan belt. You can fairly easily replace a broken blower fan belt yourself.
A noisy air conditioner can be caused by many things. A clicking sound most often means an obstruction in the outdoor fan unit. A loose fan will also make a noise and is a signal for you to tighten the fan. A pinging sound is related to condensation and is a natural part of the cooling process.