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Wendy GardnerSep 8, 2025
How to resolve low temperature lockout on Lennox MWMB012S4-*L?
- TTodd BurnsSep 8, 2025
To resolve a low-temperature lockout on your Lennox Air Conditioner's outdoor unit, increase the ambient temperature around the unit.
To Next PageTo Next PageHow to resolve low temperature lockout on Lennox MWMB012S4-*L?
To resolve a low-temperature lockout on your Lennox Air Conditioner's outdoor unit, increase the ambient temperature around the unit.
How to troubleshoot IPM error on Lennox Air Conditioner inverter module?
To troubleshoot an IPM error on your Lennox Air Conditioner's inverter module, examine the inverter module and replace it if necessary.
What to do if my Lennox MWMB012S4-*L Air Conditioner shows an indoor return air temperature sensor error?
If your Lennox Air Conditioner indicates an indoor return air temperature sensor error, examine the sensor and its connections.
How to fix indoor coil temperature sensor error in Lennox MWMB012S4-*L Air Conditioner?
To address an indoor coil temperature sensor error in your Lennox Air Conditioner, check temperature sensor functionality.
How to troubleshoot outdoor ambient temperature sensor error on Lennox MWMB012S4-*L?
To troubleshoot an outdoor ambient temperature sensor error on your Lennox Air Conditioner, test the sensor for accuracy and replace it if necessary.
What to do if my Lennox MWMB012S4-*L Air Conditioner has an outdoor coil temperature sensor error?
If your Lennox Air Conditioner shows an outdoor coil temperature sensor error, inspect and verify the sensor's condition.
General| Refrigerant | R-410A |
|---|---|
| Phase | 1 |
| Frequency | 60 Hz |
| Cooling Capacity | 12000 BTU/h |
| Stages | Single |
| Sound Pressure Level (Outdoor Unit) | 72 dB |
Details on performance, operating range, and physical characteristics of outdoor units.
Performance data, operating range, and connections for MCFA/MCFB units.
Diagrams illustrating refrigerant flow for single and multi-zone systems.
Wiring diagrams for various MPA, MPB, and MLA single-zone outdoor units.
Wiring diagrams for M22A, M33A/B, MMDA, MCFA/MCFB indoor units.
Steps for adding refrigerant and performing initial checks.
Troubleshooting guide for outdoor unit error codes (E0, E2, E3, etc.).
Troubleshooting guide for indoor unit error codes (CP, E0, E1, etc.).
Summarized error codes for single and multi-zone units.