What are the symptoms of No cooling (total) in Kia Sorento (LX)?

No cold air from vents. Frost or ice on pipes under the hood

How to fix No cooling (total) in Kia Sorento (LX)?

Carrying out detailed computer diagnostics of the HVAC system, checking the operating pressures (low and high) at the A/C service station and verifying any refrigerant losses using a UV dye or a gas detector. Depending on the detected anomalies, the repair involves replacing the damaged element (fan, sensor or cables) and refilling the system.

High Priority 100% confidence

No cooling (total)

in Kia Sorento (LX)

Symptoms

No cold air from vents
Frost or ice on pipes under the hood

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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 - (MQ4)

Refrigerant: R1234yf Amount (g): 550-600g Oil: PAG YF ISO 46 Oil (ml): 140 - 170ml

III (UM)

Refrigerant: R1234yf Amount (g): 650g Oil: PAG YF PAO 68 AA1 lub PAG ISO 46 YF Oil (ml): 130ml

III (UM)

Refrigerant: R134a Amount (g): 700g Oil: PAG PAO 68 AA1 lub PAG ISO 46 Oil (ml): 130ml

See full specification

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