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Bay Area HVAC Service

Maintenance Plans · Clayton ·

Clogged AC Coils in Clayton, CA: Deep Cleaning Rheem Outdoor Units

Dust and lint covering the Rheem outdoor coil beside the beige wall before cleaning in Clayton

Equipment

  • Rheem central air conditioners, outdoor units

Deep coil cleaning on Rheem AC units in Clayton

Problem: Two days earlier we were at this Clayton home for a Nest error and repaired a damaged communication wire (that visit is here). While we were outside, we saw the outdoor coils on the Rheem units. They were caked with dust, lint and dry leaves, and we recommended a deep cleaning.

Diagnostics: With the top and fan off, the problem was plain. A felt-like layer of dust covered the coil fins from top to bottom, and leaves had piled up at the base. Air has to pass through those fins to carry heat out of the house. When they’re blocked, the system runs longer and works harder for the same cooling.

Solution: We came back on October 8. We opened each unit, cleaned the coils from the inside out, rinsed the cabinet base around the compressor and cleared the debris. Then we put the units back together.

Result: The fins are open again, and the photos show the difference better than we can describe it. Units under trees clog faster. Look at the coil through the grille once a year, and if you can’t see the fins, it’s time for a cleaning.

We service Rheem air conditioners in Clayton and across the East Bay. See our maintenance plans.


Before

Dust and lint covering the Rheem outdoor coil beside the beige wall before cleaning in Clayton
Dust and lint covering the Rheem outdoor coil beside the beige wall before cleaning in Clayton
Dust and lint on a Rheem outdoor coil before cleaning in Clayton
Dust and lint on a Rheem outdoor coil before cleaning in Clayton
Dust and lint covering the Rheem outdoor coil below the octagonal window before cleaning in Clayton
Dust and lint covering the Rheem outdoor coil below the octagonal window before cleaning in Clayton

After

A Rheem outdoor coil beside the beige wall after cleaning in Clayton
A Rheem outdoor coil beside the beige wall after cleaning in Clayton
A Rheem outdoor coil after cleaning in Clayton
A Rheem outdoor coil after cleaning in Clayton
Rinsed cabinet base and exposed coil fins around the compressor after cleaning in Clayton
Rinsed cabinet base and exposed coil fins around the compressor after cleaning in Clayton
Rheem outdoor unit reassembled below the same octagonal window after cleaning in Clayton
Rheem outdoor unit reassembled below the same octagonal window after cleaning in Clayton

Project completed by Andrew Kuznetsov and the Bay Area HVAC Service team. Andrew is the founder and owner of Bay Area HVAC Service (ADRIUM Service Solutions). He holds a California Contractor License (CSLB #1136642), EPA 608 certification, and completed Daikin factory training in Houston in 2025.

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