Simple Air Conditioner Repair Tips

When faced with an air conditioning problem at a time when it is needed most, we are forced to transform into do-it-yourself mechanics. Generally, air condition repair should be done by licensed air conditioning mechanics. But, as a rule, we need to know some troubleshooting skills that we can use, especially in times of emergency.

The following are the most common problems encountered with climate controllers, and their specific corresponding air conditioner repair solutions:

For a running AC that does not cool

This needs cleaning. Before starting the work, switch off the system. Clean debris and leaves away from the condenser. Second, remove the covering of the condenser’s fin. With a soft brush or fin comb, clean the fins. To clean the interior, unscrew and remove the top grille making sure not to pull any wire. Water down the fins and reassemble the unit. Lastly, check by turning it on and letting it run for a few minutes. With this, check the two pipes connecting to the condenser. One should be cooler than the other. If not, then it’s time to call the technician.

For an air conditioner that doesn’t turn on

First, check the switches involved. If power lines are intact, set the thermostat to “cool” mode and below the current temperature. Turn it off and check the thermostat. Take out the thermostat cover and detach the wire in terminal Y. To test, switch the system on and hold the wire only by its insulation. Tap the bare end of terminal R as you hold it in place for two minutes. A kicking compressor means a faulty thermostat so a replacement is needed. If the compressor does not turn on when the two wires are held together, turn off the switch and call a technician.

When room temperature drops too low

A temperature lower than what is set on the thermostat usually means that the thermostat is improperly installed or has a low calibration that cannot sense a proper sampling of room air. Same procedure as above: take off the wire in the Y terminal and check using the same test.

For a squealing air handler

Generally, squealing sounds occur when the belt connecting the motor to the fan slides. If the belt is worn out, improperly aligned, or needs to be replaced, you better refer to the manual. You may also adjust and realign the belt, just don’t tighten it overly. For a grinding noise, shut the unit off and call a heat pump repair technician.

When Air ducts are noisy

Usually, ducts are noise-producing metals. To prevent the problem for long term purposes, have a heating contractor break the sound conduction with an insertion of flexible insulating ductwork between the system and the ductwork.

The ‘ping’ or ‘pop’ sound from the ductwork may be caused by air blowing past a loose flap of metal or by thermal expansion. Listen and track as the duct runs.