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No airflow from specific vents or clicking noise behind dashboard

Q: What are the symptoms of No airflow from specific vents or clicking noise behind dashboard in Volkswagen Jetta Mk4?

No cold air from vents. Weak cabin cooling

Q: How to fix No airflow from specific vents or clicking noise behind dashboard in Volkswagen Jetta Mk4?

Covering the flaps with new sealing foam or dedicated HV aluminum tape (requires disassembling the heater assembly). Holes in the flaps (after the sponge falls off) cause permanent mixing of heat with the air conditioning. There are repair methods without removing the entire board (through the heater hole), but this is still a job for the patient.

in Volkswagen Jetta Mk4 (1997-2005)

Symptoms

No cold air from vents
Weak cabin cooling

DTC error codes

Brak

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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

Najnowsza MQB / GLI

Refrigerant: R1234yf Amount (g): 460g Oil: PAG ISO 46 YF Oil (ml): b.d.ml

IV (162) Denso SES14C/Sanden 11PXE14

Refrigerant: R134a Amount (g): 500g Oil: PAG PAG 46 lub PAO 68 Oil (ml): 80ml

kompresor Denso SEU16C

Refrigerant: R134a Amount (g): 525g Oil: G 052 300 A2 PAO 68 lub PAG ISO 46 Oil (ml): 180ml

See full specification

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