Lennox Ducted Heating

Lennox Ducted Heating Error Code E310

Ducted Heating

E310 means different things on different Ducted Heating models. Enter your model number to see only your reading, or find your model below.

What It Means

  • SL280DFNV, SL280UHV, SL297UHNV: Discharge error temperature sensor failure. Only shown if shorted or out of range.
  • SLP98UHV, SLP99UHV: Discharge error sensor failure - No error if disconnected. Only shown if shorted or out-of-range.

Causes & actions from Lennox

Discharge error temperature sensor failure. Only shown if shorted or out of range.

Models: SL280DFNV, SL280UHV, SL297UHNV

How it shows
  • Integrated control 7-segment display: E310

Compare outdoor sensor resistance to temperature/ re- sistance charts in installation instructions. Replace sensor if necessary. Cleared in Communicating mode: 30 sec- onds after fault recovered. In Non- Communicating mode: Cleared after the current heat call is completed.

Applicable models & manual sources

Discharge error sensor failure - No error if disconnected. Only shown if shorted or out-of-range.

Models: SLP98UHV, SLP99UHV

How it shows
  • Integrated control 7-segment display: E310

Discharge air temperature(DATS) out of range, code is activated during "Field test mode".

Applicable models & manual sources
  • SLP98UHV

    Discharge error sensor failure − No error if disconnected. Only shown if shorted or out−of−range.

    SLP98UHV manual, page 64

  • SLP99UHV

    Discharge error sensor failure - No error if disconnected. Only shown if shorted or out-of- range.

    SLP99UHV manual, page 32

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.

Download on the App Store Get it on Google Play
Scan to install on your phone Free · iPhone & Android
See how guided diagnosis works →