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Keep Your Air Conditioner Clean

Increase your system's lifespan

Cleaning your air conditioner’s coils regularly allows your unit to run more efficiently and can make your home feel more comfortable. Early spring is the best time for cleaning AC coils and can help prevent emergency summer maintenance when you need your home at its coolest.

Air Conditioner Coil Maintenance


The following information is for educational purposes only. Tampering with your system may void your warranty. If you have any questions about your system, call a Trane Comfort Specialist™.

Dealer Maintenance

Coil cleaning should be done at least once a year by a Trane Comfort Specialist™. Before your specialist arrives take care to remove any flowers, bushes, weed or grass that has potential to get inside the unit and remember foliage should be at least 2 feet away from the unit. Here’s what your specialist will handle during your maintenance appointment.

Disconnect power to the air conditioner

A Trane dealer will look for the shutoff box outside near the unit. If there is not shutoff box, you will need to show the specialist where the circuit breaker is located to turn the power off there.

    Remove outer case

    Depending how the outer case of access panels are attached, your specialist will need either a screw or nut driver to do this.

      Remove top of air conditioner

      Some air conditioners are constructed with the fan assembly attached to the top. If your air conditioner is constructed this way, your specialist will be careful not to stretch or damage any wires.

        Clean and lubricate assembly

        Your specialist will clean any dirt off the fan blades and use a shop vacuum to clean dirt off the fan motor and shaft. If the motor requires any lubrication, a small amount will be applied to each of its lubrication ports.

          Clean A/C coils

          Dirt will be whisked away from the surface of the coils with a broom.

            Spray trapped dirt away from coils

            After covering any exposed wires or motors with plastic, your specialist using either water or a biodegradable foaming cleaner will spray cleaner soak for 10 to 15 minutes on the coils.

              Remove cleaner

              Spraying rinse water from the inside, your specialist will remove the cleaner and any dirt away from the air conditioner coils.

                Inspect coil fins for damage

                Using a special comb, your specialist can straighten any bent coil fins.

                  Reassemble the air conditioner

                  Your specialist will reassemble your air conditioner now that your coils are clean.