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A004

A004 - Compressor shutdown: Discharge-suction trip

Rheem · Air Conditioning

What does A004 mean?

The heating source has switched to electric elements because the compressor is not working correctly. This indicates a potential issue with the compressor or its operation.

Common Causes

  • Fan is not operational
  • Filter screen is dirty
  • Compressor malfunction or refrigerant leak

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Confirm the fan is running when the compressor is on. Check fan continuity if it's not.

  2. 2

    Clean the filter screen.

  3. 3

    Inspect the compressor and nearby parts for oily residue indicating a leak. If the compressor is not working or shows signs of leakage, the unit may need replacement.

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

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Source: Rheem Air Conditioning
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