What are the symptoms of Unusual noise and metallic grinding when A/C is on in SEAT Ibiza MK3/MK4?

Clicking or rattling behind dashboard. Hissing from vents

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Unusual noise and metallic grinding when A/C is on

Q: How to fix Unusual noise and metallic grinding when A/C is on in SEAT Ibiza MK3/MK4?

Removing the compressor pulley clutch disc without unsealing the A/C system, and then using a hydraulic press to replace the worn-out rolling bearing and the clutch disc with new ones.

in SEAT Ibiza MK3/MK4 (1998-2012)

Symptoms

Clicking or rattling behind dashboard
Hissing 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

(6P) kompresor Delphi

Refrigerant: R134a Amount (g): 500g Oil: G 052 300 A2 PAO 68 lub PAG ISO 46 Oil (ml): 110ml

(6P) kompresor Denso

Refrigerant: R134a Amount (g): 500g Oil: G 052 300 A2 PAO 68 lub PAG ISO 46 Oil (ml): 90ml

V (6J) kompresor Denso

Refrigerant: R134a Amount (g): 500g Oil: G 052 300 A2 PAO 68 lub PAG ISO 46 Oil (ml): 140ml

See full specification

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