Lennox VRF / VRV

Lennox VRF / VRV Error Code E4

VRF / VRV

E4 means different things on different VRF / VRV models. Enter your model number to see only your reading, or find your model below.

What It Means

  • T2B (Outlet of evaporator sensor) malfunction
  • VWMB: Evaporator outlet temperature sensor (T2B) error
  • VWMB: T2B temperature sensor error.
  • V33B: Temp. sensor (T2B) error

Causes & actions from Lennox

T2B (Outlet of evaporator sensor) malfunction

13 models

V22B, V33B, VCFB, VHIB, VMDB, VOSB, VOWA, VRHC, VRHCVOS01-3P, VSCA, VSEA, VVCB, VWMB

Reheat coil (indoor), VRF indoor unit (indoor)

How it shows
  • Indoor receiver display: E4

This manual entry does not list further causes or actions.

Applicable models & manual sources

Evaporator outlet temperature sensor (T2B) error

Models: VWMB

How it shows
  • Indoor receiver display: E4

This manual entry does not list further causes or actions.

Applicable models & manual sources

T2B temperature sensor error.

Models: VWMB

How it shows
  • wired controller display: E4

This manual entry does not list further causes or actions.

Applicable models & manual sources

Temp. sensor (T2B) error

Models: V33B

How it shows
  • Indoor receiver display: E4

This manual entry does not list further causes or actions.

Applicable models & manual sources
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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