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A902

A902 - Controller fault: Call Tech Service

Rheem · Air Conditioning

What does A902 mean?

The controller has reported a fault. This indicates a potential internal issue requiring professional diagnosis and repair.

Common Causes

  • Controller malfunction
  • Internal electronic fault

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify power supply to the unit.

  2. 2

    Perform a power cycle by turning the unit off and then on again.

  3. 3

    Call technical service for assistance.

Browse all codes in this manual (48)
Verified technical data. Last updated: April 2026

Related Faults

1 beep1 beep - WiFi Soft Reset initiated3 beeps3 beeps - WiFi Hard Reset initiated3 red flashes3 red flashes — Communication error
Source: Rheem Air Conditioning
Open Manual (Page 34)Search more codes in this manual