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Do not connect to a GFCI or AFCI circuit

Warning: Do not connect to GFCI or AFCI circuits

Rheem · Tankless Water Heaters

What does Do not connect to a GFCI or AFCI circuit mean?

The water heater should not be connected to a Ground Fault Circuit Interrupter (GFCI) or Arc Fault Circuit Interrupter (AFCI) protected circuit. These types of circuits can interfere with the proper operation of the water heater.

Common Causes

  • Accidental connection to GFCI or AFCI protected circuits

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the circuit you are using is not a GFCI or AFCI type.

  2. 2

    If the circuit is GFCI or AFCI protected, use a different, standard circuit.

  3. 3

    Consult an electrician if you are unsure about your circuit types.

Browse all codes in this manual (24)
Verified technical data. Last updated: April 2026

Related Faults

88Error 88 — Maintenance required before clearing codeAlarm/Error IndicatorSystem Alert — An issue has been detectedDANGER: Shock HazardDANGER: Shock Hazard — Electrical power is present
Source: Rheem Tankless Water Heaters
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