What It Means
- M22A, M33A, M33B: Indoor unit is running a self clean operations.
- Self Clean feature active. In cooling or dry mode, the indoor coil dries and then the unit turns off.
Lennox Split & Multi-Split
Lennox Error Code SC
Split & Multi-Split
SC 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
Indoor unit is running a self clean operations.
Models: M22A, M33A, M33B
Mini-split unit (indoor)
How it shows
- Indoor receiver display: SC
This manual entry does not list further causes or actions.
Applicable models & manual sources
- M22A
Indoor unit is running a self clean operations.
M22A, M33A, M33B
Self Clean feature active. In cooling or dry mode, the indoor coil dries and then the unit turns off.
8 models
3WMC, M22A, M33C, MCFA, MCFB, MFMA, MMDB, MWMC
Mini-split unit (indoor)
How it shows
- 507550 indoor display: SC
Self Clean feature active. In cooling or dry mode only, indoor unit temporarily changes operation to allow condensate on indoor unit coil to evaporate, and then turns off.
Applicable models & manual sources
- M22A
Self Clean feature active. In cooling or dry mode, the indoor coil dries and then the unit turns off.
M22A, MMDB, MCFA, MCFB, MFMA, M33C, MWMC, 3WMC
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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