High Priority 90% confidence

Air conditioning stopped cooling / no response to AC button

Q: How to fix Air conditioning stopped cooling / no response to AC button in Hyundai i20?

No fault. Informing the driver about the design features of the TTTM (Ten Type Tak Ma). Tinting the rear windows with the strongest foil to reflect the sun. This is the so-called manufacturer's thermodynamic physics error - they saved on air conditioning power. In +35 heat, you will steam when stopped in the i20. Don't get caught up in 'replacing the compressor at the mechanic's for PLN 2,000 because it's apparently worn out'. A new, genuine OEM one from the Dealership won't cool you any better.

in Hyundai i20

Symptoms

Air conditioning does not turn on

DTC error codes

Brak (Idealna Praca pump)

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

(GB)

Refrigerant: R1234yf Amount (g): 470g Oil: FD46XG PAO 68 AA1 lub PAG ISO 46 YF Oil (ml): 110ml

(GB)

Refrigerant: R134a Amount (g): 470g Oil: FD46XG PAO 68 lub PAG ISO 46 Oil (ml): 110ml

Standard

Refrigerant: R134a Amount (g): 450g Oil: PAG FD46XG PAO 68 lub PAG ISO 46 Oil (ml): 120ml

See full specification

Have this problem?

Generate a personalized AI report for your Hyundai i20 or book a workshop visit.

Generate AI report Schedule visit

Air conditioning stopped cooling / no response to AC button

Symptoms

DTC error codes

A/C Technical Specifications

Other problems in i20

Have this problem?