High Priority 93% confidence

Air conditioning stopped cooling / no response to AC button

Q: How to fix Air conditioning stopped cooling / no response to AC button in SEAT Toledo MK3?

Verification and replacement of fuse no. 46 (5A) in the cabin and disconnection of damaged washer nozzle heaters or replacement of nozzles with new ones.

in SEAT Toledo MK3 (2005-2012)

Symptoms

No cold air from vents

Verifying license...

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

Refrigerant: R134a Amount (g): 500g Oil: G 052 154 A2 PAO 68 lub PAG ISO 46 Oil (ml): 120ml

III (5P2) kompresor Denso

Refrigerant: R134a Amount (g): 525g Oil: G 052 154 A2 PAO 68 lub PAG ISO 46 Oil (ml): 140ml

III (5P2) kompresor Sanden

Refrigerant: R134a Amount (g): 525g Oil: G 052 154 A2 PAO 68 lub PAG ISO 46 Oil (ml): 110ml

See full specification

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