What It Means
- V36C***S4-4P: 4. The evaporator-out sensor is detached.
- VHEC***S4-4P, VHTC***S4-4P: EVA OUT sensor of Hydro unit / Hydro unit HT is detached
Lennox VRF / VRV
Lennox Error Code E129
VRF / VRV
E129 means different things on different VRF / VRV models. Enter your model number to see only your reading, or find your model below.
Causes & actions from Lennox
4. The evaporator-out sensor is detached.
Models: V36C***S4-4P
VRF indoor unit (indoor)
How it shows
- vrf 360 fault code: E129
- vrf 360 indoor indicator: ice_blue: off, yellow_green: off, blue: flashing, red: off (blue: flashing, ice_blue: off, red: off, yellow_green: off)
This manual entry does not list further causes or actions.
Applicable models & manual sources
- V36C***S4-4P
4. The evaporator-out sensor is detached.
EVA OUT sensor of Hydro unit / Hydro unit HT is detached
Models: VHEC***S4-4P, VHTC***S4-4P
Hydro unit (indoor)
How it shows
- hydro main pcb display: E129
- hydro wired controller display: E129
This manual entry does not list further causes or actions.
Applicable models & manual sources
- VHEC***S4-4P
EVA OUT sensor of Hydro unit / Hydro unit HT is detached
VHEC***S4-4P, VHTC***S4-4P
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?
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