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Air conditioning stopped cooling / no response to AC button

Q: What are the symptoms of Air conditioning stopped cooling / no response to AC button in Dacia Logan (I/II)?

Frost or ice on pipes under the hood. Air conditioning does not turn on. Problem after collision or accident

Q: How to fix Air conditioning stopped cooling / no response to AC button in Dacia Logan (I/II)?

COMPRESSOR SD7H15: Very often you can replace only the clutch or the coil (Dacia has classic clutches!). O-RINGS: Full set of O-rings + suction and filling. PIPES: Dacja Duster Aluminum pipes under the hood corrode at the clamps - the same problem as the Audi 80. Dacia Logan/Sandero/Duster is a Renault interior - AC parts are identical and 20-30% cheaper than under the Renault name. Check the OEM part number - they are interchangeable between both brands.

in Dacia Logan (I/II) (2004-2025)

Symptoms

Frost or ice on pipes under the hood
Air conditioning does not turn on
Problem after collision or accident

DTC error codes

Low pressure / Clutch fault

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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

II kompresor Valeo

Refrigerant: R1234yf Amount (g): 430g Oil: VC200YF PAO 68 AA1 lub PAG ISO 100 YF Oil (ml): 110ml

II kompresor Calsonic

Refrigerant: R134a Amount (g): 480g Oil: PAG 488 PAO 68 lub PAG ISO 150 Oil (ml): 150ml

II kompresor Valeo

Refrigerant: R134a Amount (g): 480g Oil: PAG 488 PAO 68 lub PAG ISO 150 Oil (ml): 95ml

See full specification

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