What are the symptoms of Hissing from vents and slow loss of refrigerant in Kia Ceed?

Frost or ice on pipes under the hood

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Hissing from vents and slow loss of refrigerant

Q: How to fix Hissing from vents and slow loss of refrigerant in Kia Ceed?

(1) THERMISTOR: Evaporator temperature sensor replacement (part 97143D3000 for Tucson TL/Sportage QL) - access from the driver's footwell, without removing the dashboard. (2) CONDENSER: Removal of lower bumper cover, inspection and replacement if weld cracked. The thermistor in Tucson/Sportage is a repair with access from the driver's legs - 30 minutes and PLN 80 for parts. Without dismantling the board! One of the simplest maintenance addictions in Korean air conditioning.

in Kia Ceed (2015-2022)

Symptoms

Frost or ice on pipes under the hood

DTC error codes

Evaporator temperature sensor fault

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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

Refrigerant: R1234yf Amount (g): 480g Oil: PAG46yf Oil (ml): 110ml

Refrigerant: R1234yf Amount (g): 500g Oil: PAG46yf Oil (ml): 150ml