What It Means
- Communication error between outdoor unit and all indoor units.
- MLA, MPA, MPB: Communication malfunction between indoor and outdoor units
- Programmable Wired Controller: Indoor room temperature sensor error (T1)
Lennox Split & Multi-Split
Lennox Split & Multi-Split Error Code E2
Split & Multi-Split
E2 means different things on different Split & Multi-Split models. Enter your model number to see only your reading, or find your model below.
Causes & actions from Lennox
Communication error between outdoor unit and all indoor units.
10 models
3WMB036, M22A, M33A, M33B, MCFA, MCFB, MMDA, MMDB, MWMA, MWMB
Mini-split unit (indoor)
How it shows
- corp1816 old indoor display: E2
This manual entry does not list further causes or actions.
Applicable models & manual sources
- MWMA
Communication error between outdoor unit and all indoor units.
MWMA, MWMB, 3WMB036, M22A, M33A, M33B, MMDA, MMDB, MCFA, MCFB
Communication malfunction between indoor and outdoor units
Models: MLA, MPA, MPB
Mini-split unit (outdoor)
How it shows
- corp1816 multizone outdoor display: E2
- corp1816 new indoor error: E1
This manual entry does not list further causes or actions.
Applicable models & manual sources
- MPA
Communication malfunction between indoor and outdoor units
MPA, MPB, MLA
Indoor room temperature sensor error (T1)
Models: Programmable Wired Controller
Mini-split unit
How it shows
- 507550 wired controller: E2
This manual entry does not list further causes or actions.
Applicable models & manual sources
- Programmable Wired Controller
Indoor room temperature sensor error (T1)
Programmable Wired Controller manual, page 7
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.
