Error code reference

Lennox Furnace Error Code E 274

Soft lockout - Exceeded maximum number of recycles, last recycle failed due to the limit circuit opening or limit remained open longer than 3 minutes.

SourceLennox EL296UHE - Service Manual: High-Efficiency Gas Furnacep. 13

Lennox codes Lennox furnace codes

Diagnostic procedure

The full E 274 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview

First diagnostic step

Shut down system. 1-hour soft lockout. Check firing rate and air flow. Check for blockage. Clears when heat call finishes successfully.

SourceLennox EL296UHE - Service Manual: High-Efficiency Gas Furnacep. 13

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More steps, wiring diagram references, and verified part numbers

Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.

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Where this code is documented

3 manuals in the MyPros+ library document this code for Lennox furnace.

Models covered by the manuals that document this code

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The full E 274 procedure

Where this code is documented

Models covered by the manuals that document this code

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