What It Means
- Outdoor unit has been cycled OFF on low temperature protection.
- Outdoor unit has been cycled OFF on low temperature protection (-20°F).
- 3WPD036S6S-1P: Communication error between wired remote control and indoor unit
Lennox Split & Multi-Split
Lennox Split & Multi-Split Error Code E601
Split & Multi-Split
E601 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
Outdoor unit has been cycled OFF on low temperature protection.
40 models
EL18XCV, EL18XCV-024, EL18XCV-036, EL18XCV-048, EL18XCV-060, EL18XPV, EL18XPV-024, EL18XPV-036, EL18XPV-048, EL18XPV-060, EL19KPV, EL19KPV-024, EL19KPV-036, EL19KPV-048, EL19KPV-060, EL21KLV, EL21KLV-024, EL21KLV-036, EL21KLV-048, EL21KLV-060, EL22KCV, EL22KCV-024, EL22KCV-036, EL22KCV-048, EL22KCV-060, SL22KLV, SL22KLV-024, SL22KLV-036, SL22KLV-048, SL22KLV-060, SL25KCV, SL25KCV-024, SL25KCV-036, SL25KCV-048, SL25KCV-060, SL28XCV, SL28XCV-024, SL28XCV-036, SL28XCV-048, SL28XCV-060
Air conditioner (outdoor), Heat pump (outdoor)
How it shows
- Outdoor control 7-segment display: E601
Low temperature protection: Outdoor unit will not operate when the outdoor temperature is at or below -4°F (-20°C). If the unit is operating and the outdoor temperature drops below -4°F (-20°C), the unit continues to operate until the room thermostat is satisfied or the outdoor temperature drops to -15°F (-26°C). Outdoor unit ambient sensor provides temperature readings.
Other manual wording
EL18XCV, EL18XCV-024, EL18XCV-036, EL18XCV-048, EL18XCV-060, EL18XPV, EL18XPV-024, EL18XPV-036, EL18XPV-048, EL18XPV-060, EL19KPV,…
Low temperature Protection: Outdoor unit will not operate when the outdoor temperature is at or below -4° F (-20°C). If the unit is operating and the outdoor temperature drops below -4°F (-20°C), the unit will continue to operate until the room thermostat is satisfied or the outdoor temperature drops to -15°F (-26°C). (Outdoor unit ambient sensor provides temperature readings.)
Applicable models & manual sources
- EL18XCV
Outdoor unit has been cycled OFF on low temperature protection.
EL18XCV, EL18XCV-024, EL18XCV-036, EL18XCV-048, EL18XCV-060
- EL18XPV
Outdoor unit has been cycled OFF on low temperature protection.
EL18XPV, EL18XPV-024, EL18XPV-036, EL18XPV-048, EL18XPV-060
- EL19KPV
Outdoor unit has been cycled OFF on low temperature protection.
EL19KPV, EL19KPV-024, EL19KPV-036, EL19KPV-048, EL19KPV-060
- EL21KLV
Outdoor unit has been cycled OFF on low temperature protection.
- EL22KCV
Outdoor unit has been cycled OFF on low temperature protection.
EL22KCV, EL22KCV-024, EL22KCV-036, EL22KCV-048, EL22KCV-060
- SL22KLV
Outdoor unit has been cycled OFF on low temperature protection.
SL22KLV, SL22KLV-024, SL22KLV-036, SL22KLV-048, SL22KLV-060
- SL25KCV
Outdoor unit has been cycled OFF on low temperature protection.
SL25KCV, SL25KCV-024, SL25KCV-036, SL25KCV-048, SL25KCV-060
- SL28XCV
Outdoor unit has been cycled OFF on low temperature protection.
SL28XCV, SL28XCV-024, SL28XCV-036, SL28XCV-048, SL28XCV-060
- EL18XCV
Outdoor unit has been cycled OFF on low temperature protection.
EL18XCV, EL18XCV-024, EL18XCV-036, EL18XCV-048, EL18XCV-060
- EL18XPV
Outdoor unit has been cycled OFF on low temperature protection.
EL18XPV, EL18XPV-024, EL18XPV-036, EL18XPV-048, EL18XPV-060
- EL19KPV
Outdoor unit has been cycled OFF on low temperature protection.
EL19KPV, EL19KPV-024, EL19KPV-036, EL19KPV-048, EL19KPV-060
- EL21KLV
Outdoor unit has been cycled OFF on low temperature protection.
EL21KLV, EL21KLV-024, EL21KLV-036, EL21KLV-048, EL21KLV-060
- EL22KCV
Outdoor unit has been cycled OFF on low temperature protection.
EL22KCV, EL22KCV-024, EL22KCV-036, EL22KCV-048, EL22KCV-060
- SL25KCV
Outdoor unit has been cycled OFF on low temperature protection.
SL25KCV, SL25KCV-024, SL25KCV-036, SL25KCV-048, SL25KCV-060
- SL28XCV
Outdoor unit has been cycled OFF on low temperature protection.
SL28XCV, SL28XCV-024, SL28XCV-036, SL28XCV-048, SL28XCV-060
Outdoor unit has been cycled OFF on low temperature protection (-20°F).
5 models
SL22KLV, SL22KLV-024, SL22KLV-036, SL22KLV-048, SL22KLV-060
Heat pump (outdoor)
How it shows
- Outdoor control 7-segment display: E601
Low temperature Protection: Unit will operate down to -20°F. Unit will cycle off at temperatures below -20°F. Unit restarts when ambient reaches -15°F or higher.
Applicable models & manual sources
- SL22KLV
Outdoor unit has been cycled OFF on low temperature protection (-20°F).
SL22KLV, SL22KLV-024, SL22KLV-036, SL22KLV-048, SL22KLV-060
Communication error between wired remote control and indoor unit
Models: 3WPD036S6S-1P
Mini-split unit (outdoor)
How it shows
- mini outdoor inverter pcb: E601
- Mini-split outdoor main board: E601
1. C heck remote control wire connectors. 2. Change wired remote control.
Applicable models & manual sources
- 3WPD036S6S-1P
Communication error between wired remote control and indoor unit
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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