What It Means
- Discharge air temperature too high (gas heat only).
Lennox Ducted Heating
Lennox Error Code E252
Ducted Heating:
Causes & actions from Lennox
How it shows
- Integrated control 7-segment display: E252
Check temperature rise, air flow and input rate. Cleared when heat call is finished.
Other manual wording
SLP98UHV, SLP99UHV
Check temperature rise, air flow and input rate.
Applicable models & manual sources
- SL280DFNV
Discharge air temperature too high (gas heat only).
- SL280UHV
Discharge air temperature too high (gas heat only).
- SL297UHNV
Discharge air temperature too high (gas heat only).
- SLP98UHV
Discharge air temperature too high (gas heat only).
- SLP99UHV
Discharge air temperature too high (gas heat only).
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.
