Before an ac repair service, ALWAYS start by turning off the power to the unit, which can be done at the service disconnect on your outdoor unit or at the main breaker panel of your home.
Next, remove the access panel on your condensing unit and see if you see any signs of overheating – melted insulation on wires, blackened or burned-looking wires, and the like.
You can also check any electrical connections to make sure they are tight. If you own an electrical test meter, you can check the capacitors in the unit.
Take a look at the contactor switch, and replace it if you see excessive pitting.
If you see any of the above problems and do not feel comfortable replacing the parts yourself during the ac repair, always call a local heating and air conditioning expert to do the work for you.
AC Tip 2: Check Condenser Unit Fan
Turn the power off to your air conditioner unit, and check the fan mounted on the top of the outside condenser unit to make sure it’s still in good condition. Replace the fan blades if there are any cracks or chips visible in one or more of the blades.
If you have an older air conditioner unit, the fan motor bearings may need to be oiled regularly as well.
AC Tip 3: Clean Outside Unit
Over time leaves, dirt, grass clippings and the like will build up on the outside of the air conditioner unit, decreasing system capacity and reducing air flow.
After shutting off the power to the unit, use a garden hose to gently wash out the debris, starting at the top with the hose at about a 45° angle. Do NOT use a power washer, and take care not to bend or damage the delicate fins on the coil.
You should also trim any shrubs or other plants back from around your air conditioner to keep from impeding air flow to and from the unit.