High Priority 91% confidence

Air conditioning stopped cooling / no response to AC button

Q: How to fix Air conditioning stopped cooling / no response to AC button in Peugeot 406?

Replace the compressor electromagnetic clutch coil. The repair can be completed directly on the vehicle (by removing the front right wheel, splash shield, and clutch hub with snap-ring pliers) without discharging the refrigerant.

in Peugeot 406 (2005-2021)

Symptoms

No cold air from vents

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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

1,6/1,8/2,0 – kod silnika XU

Refrigerant: R134a Amount (g): 775g Oil: SP 10 PAO 68 lub PAG ISO 46 Oil (ml): 120 – 150ml

2,0 – kod silnika EW10

Refrigerant: R134a Amount (g): 620g Oil: SP 10 PAO 68 lub PAG ISO 46 Oil (ml): 120 – 150ml

2,2 HDi

Refrigerant: R134a Amount (g): 620g Oil: UCON RL 488 PAO 68 lub PAG ISO 150 Oil (ml): 250 – 280ml

See full specification

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Air conditioning stopped cooling / no response to AC button

Symptoms

A/C Technical Specifications

Other problems in 406

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