Avoid Unwanted Rooftop AC Repair – Here’s How to Maintain Your Rooftop HVAC Unit

Home Improvements
Avoid Unwanted Rooftop AC Repair – Here’s How to Maintain Your Rooftop HVAC Unit


Rooftop AC repair can be very expensive. Thankfully, there are some routine checkups to help you ensure that your rooftop system will run as smoothly as possible.

Check for Power

Start by checking that your unit has sufficient power. If it has, look for faults codes or service lights. More often than not, turning off the unit’s main power and turning it on again can reset the unit control board, and fault code could be lost. The codes could be shown on the unit itself, or on its thermostat. Adjust the thermostat’s temperature set-point, and take note of a clicking noise which indicates that thermostat relays are already engaging.

Do a Visual Inspection

Check the rooftop unit visually, searching for greasy or oily areas since these could mean a leak in the refrigerant. Look at the evaporator and condenser coils to check if they require cleaning. Ice on the unit’s evaporator could mean a low airflow or low refrigerant charge because of too restrictive or dirty air filter.

Filter Change out

When the air filter gets too dirty, you should have it replaced with one of the right size. Make sure that the performance and physical size of the air filter is a match to the unit’s required airflow. You also need to check the indoor fan. If the fan uses the usual assembly of indoor centrifugal, something as tiny as 1/16 inch of dirt on blades could affect the fan’s airflow capability as much as 10 to 15 percent.

Tighten the Electrical Connections

Once you finished looking for visual signs of possible required service, turn off the unit’s power, and start the maintenance procedure through tightening the electrical connections. Most unit failures are because of lose wiring. You have to be careful when you tighten the compressor’s electrical connections. When they seem overheated or damaged in any way, there is a possibility that the terminal connections have been compromised. When the capacitors seem deformed, you might want to replace them as it signals that their life cycle has come to an end.

Clean the Coils

It could be challenging to clean the evaporator coil. If the air filter does its job, the indoor coil shouldn’t be too dirt. You can use compressed air if possible for cleaning the coil. Just make sure that you don’t bend its fins. If you will use water, don’t let it overflow from the drain pan and don’t use too much water pressure.

Follow these basic AC maintenance steps and you can be sure that your rooftop system will perform longer and better in the years to come.

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