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Venting installation incomplete

Installation Error: Venting not completed

Rheem · Tankless Water Heaters

What does Venting installation incomplete mean?

The water heater's venting system must be fully installed and meet all dimensional requirements before operation. Incorrect venting can lead to safety hazards and improper functioning.

Common Causes

  • Venting terminal not installed correctly
  • Improper clearances to windows, doors, or soffits
  • Venting materials not meeting code

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Review the venting installation instructions in the manual.

  2. 2

    Ensure all required clearances (A through M) around the vent terminal are met.

  3. 3

    Verify the vent terminal is located in a permitted area.

  4. 4

    Confirm all vent pipe connections are secure and properly sealed.

  5. 5

    Do not connect power until venting is fully installed and inspected.

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
Open Manual (Page 26)Search more codes in this manual