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A112

A112 - Shutoff Valve Not Open: Heating Disabled

Rheem · Water Heaters

What does A112 mean?

The automatic shutoff valve (on premium models) is currently closed, which disables heating. Manually open the valve if no water is detected or if the unit is not being serviced.

Common Causes

  • Automatic shutoff valve is closed
  • System requires manual intervention

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Manually open the shutoff valve if appropriate.

  2. 2

    If unsure, contact technical support or a service provider.

Browse all codes in this manual (70)
Verified technical data. Last updated: April 2026

Related Faults

1111 - Gas shut-off valve is not fully open1212 - Gas service interrupted or LP gas low13Hot and cold water lines reversed
Source: Rheem Water Heaters
Open Manual (Page 46)Search more codes in this manual