Lennox Ducted Heating

Lennox Ducted Heating Error Code E406

Ducted Heating:

What It Means

  • LSOM - Compressor open start circuit.

Causes & actions from Lennox

How it shows
  • Integrated control 7-segment display: E406

Required amount of current is not passing through Start cur- rent transformer. Clears the error after current is sensed in START sensor, or after power reset.

Other manual wording (1 of 2)

SLP98UHV

Check compressor for hot (cool down) , check pres- sures, fan motor etc. Replace compressor if unable to get circuit to close and compressor to operate.

Other manual wording (2 of 2)

SLP99UHV

Check compressor for hot (cool down) , check pressures, fan motor etc. Replace compressor if unable to get circuit to close and compressor to operate.

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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