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83

Fault code 83 — Evaporator Middle Temperature Sensor Fault

Rheem · Air Handlers

What does 83 mean?

The temperature sensor for the evaporator coil is reporting an error. This could be due to a loose cable, a faulty sensor, or a problem with the indoor control board.

Common Causes

  • The cable of the coil temperature sensor of the evaporator fails
  • The coil temperature sensor of the evaporator fails
  • The sampling circuit is abnormal

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Reconnect the evaporator coil temperature sensor cable.

  2. 2

    Replace the evaporator coil temperature sensor if the connection is secure.

  3. 3

    If the issue persists, the indoor control board may be faulty.

Browse all codes in this manual (51)
Verified technical data. Last updated: April 2026

Related Faults

1Fault code 1 — Inverter DC voltage overload fault10Fault code 10 — PFC fault (level)11Fault code 11 — PFC power detection of failure
Source: Rheem Air Handlers
Open Manual (Page 200)Search more codes in this manual