Lennox Unit controller

Lennox Error Code 192

Unit controller

What It Means

  • HIGH TEMPERATURE (S7) COMPRESSOR 1

Causes & actions from Lennox

How it shows
  • M4 alarm code: 192

Check temperature trip switch. Compressor is off. Also check charge, fans and coil. The unit controller will clear the temperature trip alarm when corresponding compressor top cap temperature trip switch is detected as closed. Compressor will not restart until the corresponding temperature trip switch is closed and the minimum off delay has expired.

Applicable models & manual sources
Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always follow the service manual for your exact unit.

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