Lennox Packaged Unit

Lennox Packaged Unit Error Code Fast Flash

Packaged Unit: Packaged HVAC (outdoor)

What It Means

  • Normal Operation - call for heat

Causes & actions from Lennox

How it shows
  • dsi ignition heartbeat led: Fast Flash

This manual entry does not list further causes or actions.

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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