High Priority 94% confidence

No airflow from specific vents or clicking noise behind dashboard

Q: How to fix No airflow from specific vents or clicking noise behind dashboard in SEAT Leon MK3 (5F)?

Locating and disconnecting the damaged G238 sensor (in the pit) or physically replacing it with a new element, which immediately unblocks the LIN bus and restores full operation of the Climatronic panel.

in SEAT Leon MK3 (5F) (2012-2020)

Symptoms

A/C does not react to control panel settings

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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

IV - (KL)

Refrigerant: R1234yf Amount (g): 430-480g Oil: PAG YF ISO 46 Oil (ml): 120 - 140ml

III - (5F)

Refrigerant: R134a Amount (g): 450-500g Oil: PAG 46 Oil (ml): 120 - 140ml

II kompresor Denso 7SEU17C

Refrigerant: R134a Amount (g): 500 – 550g Oil: PAG PAO 68 lub PAG ISO 46 Oil (ml): 130 – 150ml

See full specification

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