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error Rheem

Error Code Error Code P1

Not enough water flow to operate the unit.

? What Causes This

Water supply pressure is too low, inlet valve is partially closed, or water line is blocked.

✓ How to Fix It

  1. Check that the water inlet shut-off valve is fully open.
  2. Verify water pressure meets minimum requirements.
  3. Inspect water inlet line for kinks or blockages.
  4. Check and clean inlet filter if present.
  5. If issue persists, contact service.

This error code appears in:

Rheem Tankless Water Heater