High Priority 97% confidence

Asymmetric cooling (driver/passenger different temperature)

Q: What are the symptoms of Asymmetric cooling (driver/passenger different temperature) in Hyundai Tucson (TL)?

Different temperature on both sides of the cabin. Musty mold odor from vents. Water dripping into cabin or wet carpets. Frost or ice on pipes under the hood

Q: How to fix Asymmetric cooling (driver/passenger different temperature) in Hyundai Tucson (TL)?

Unblocking the drain. Clean the evaporator with an antibacterial agent. A popular 'hack' in services: Cutting the end of the rubber drain (nipple) at an angle of 45 degrees. This prevents dirt from collecting and the rubber from sticking together. Fixes the problem permanently without expensive parts.

in Hyundai Tucson (TL) (2015-2021)

Symptoms

Different temperature on both sides of the cabin
Musty mold odor from vents
Water dripping into cabin or wet carpets
Frost or ice on pipes under the hood

DTC error codes

Brak

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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 - (NX4)

Refrigerant: R1234yf Amount (g): 480-530g Oil: PAG YF ISO 46 Oil (ml): 120 - 150ml

(TLE)

Refrigerant: R1234yf Amount (g): 600g Oil: FD46XG PAO 68 AA1 lub PAG ISO 46 YF Oil (ml): 100ml

III - (TLE)

Refrigerant: R134a Amount (g): 500-550g Oil: PAG 46 Oil (ml): 130 - 160ml

See full specification

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