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Air conditioning stopped cooling / no response to AC button

Q: What are the symptoms of Air conditioning stopped cooling / no response to AC button in Hyundai Kona EV?

Irregular A/C operation. No blowing from vents. Air conditioning does not turn on

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

Disassembly of the suction port for optical assessment of the coils (white thread test). In case of brown discoloration - absolute replacement of the entire pump and aggressive pipe flushing to remove acidic POE oil. Never, ever replace the burnt Inverter itself without looking into the suction hole. If the copper and threads are baked brown/black, the new Inverter will burn immediately 5 seconds after connecting the traction battery.

in Hyundai Kona EV

Symptoms

Irregular A/C operation
No blowing from vents
Air conditioning does not turn on

DTC error codes

B1695-88

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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

(OS)

Refrigerant: R1234yf Amount (g): 400-450g Oil: PAG YF ISO 46 Oil (ml): 100 - 130ml

OS (Wersje spalinowe)

Refrigerant: R1234yf Amount (g): 475g Oil: PAG ISO 46 YF Oil (ml): 120ml

See full specification

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Air conditioning stopped cooling / no response to AC button

Symptoms

DTC error codes

A/C Technical Specifications

Other problems in Kona EV

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