What It Means
- Normal operation. Call for heat.
Lennox Packaged Unit
Lennox Error Code Fast
Packaged Unit: Packaged HVAC (outdoor)
Causes & actions from Lennox
How it shows
- dsi ignition heartbeat led: Fast
This manual entry does not list further causes or actions.
Applicable models & manual sources
- ZGD036
Normal operation. Call for heat.
ZGD036, ZGD048, ZGD060, ZGD074
Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always follow the service manual for your exact unit.
What should you check next?
Continue in ACLogics with guided diagnosis for your equipment and symptoms.
