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T118

T118 - Time to check venting for debris

Rheem · Water Heaters

What does T118 mean?

This alert signifies that periodic maintenance is due, specifically to check the venting system for any obstructions or debris.

Common Causes

  • Scheduled maintenance interval reached

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Refer to the use and care manual for information on how to inspect the venting system.

  2. 2

    Contact a technical support or service provider if you need assistance.

  3. 3

    Clear the error code by pressing the clear button if applicable.

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

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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 47)Search more codes in this manual