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350

Alert 350 — Electric Heat Not Configured

Lennox · Communicating Systems

What does 350 mean?

The air handler's electric heat is either not configured or has been configured incorrectly. This can happen when there is a call for heat but the electric heat stages are not set up properly.

Common Causes

  • Electric heat is not configured for the air handler.
  • Incorrect configuration of electric heat stages.
  • Heat call with no configured electric heat.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure the Smart Hub is removed from the system before configuring electric heat.

  2. 2

    Check for proper configuration under 'Configuring Electric Heat Stages' in the air handler installation instructions.

  3. 3

    Verify that electric heat stages are correctly set up for the air handler.

Browse all codes in this manual (41)
Verified technical data. Last updated: April 2026

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Source: Lennox Communicating Systems
Open Manual (Page 47)Search more codes in this manual