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The air conditioning works in the summer (cools), but does not heat the cabin at all in the winter

Q: What are the symptoms of The air conditioning works in the summer (cools), but does not heat the cabin at all in the winter in Nissan Leaf?

Weak or no heating in winter. Blower works only on highest speed. Frost or ice on pipes under the hood

Q: How to fix The air conditioning works in the summer (cools), but does not heat the cabin at all in the winter in Nissan Leaf?

Official update of the heater/VCM controller software at the dealership. A temporary, effective solution described by the manufacturer for users in frosty conditions is to manually turn on the airflow to the maximum speed, set the temperature to 'Full Hot', then simultaneously turn on the 'Auto' and 'Defrost' modes and wait 2 minutes to force the start of the high-voltage heating block.

in Nissan Leaf (2024-2024)

Symptoms

Weak or no heating in winter
Blower works only on highest speed
Frost or ice on pipes under the hood

DTC error codes

Defrost logic lockout

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Technical diagnosis (Premium)

Recognized technical fault:

Auxiliary controller voltage instability detected

Technical analysis

Detailed analysis of HVAC controller operation parameters, CAN bus data readings, and diagnostic signal waveforms. Purchase PRO access or log in to read the full fault analysis.

Confirmed solution

Complete step-by-step repair procedure including module non-volatile memory reset, sensor calibration, and correct wiring routing. Unlock the full report to see the instruction.

Parts needed

Filters ferrite anti-interference / noise suppressor
Auxiliary starting battery (depending on cell status)

Workshop hacks

Important workshop tips for mechanics regarding bypasses without expensive control module replacement and manufacturer software service bulletins.

TSB / TPI service bulletins

TSB-24-HVAC-01TPI-2068943/2

A/C Technical Specifications

(ZE1)

Refrigerant: R1234yf Amount (g): 425g Oil: POE PAO 68 AA1 Oil (ml): 150ml

Standard

Refrigerant: R134a Amount (g): 400g Oil: ND11 POE 150 Leaf Oil (ml): b.d.ml

See full specification

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The air conditioning works in the summer (cools), but does not heat the cabin at all in the winter

Symptoms

DTC error codes

A/C Technical Specifications

Other problems in Leaf

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