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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 Toyota Avalon?

Musty mold odor from vents. Fogging windows

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

Unblocking or modifying the air conditioning evaporator drain. Water from the evaporator overflows onto the filter housing and drips directly onto the connectors of the control computer (BCM/fuse box). The repair involves carefully unblocking the rubber condensate drain in the bulkhead and protecting (e.g. with a protective foil or plastic cover) the electronic modules against moisture.

in Toyota Avalon (2012-2013)

Symptoms

Musty mold odor from vents
Fogging windows

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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

Single A/C

Refrigerant: R134a Amount (g): 800g Oil: - Oil (ml): - ml

od Zredukowana Pojemność

Refrigerant: R134a Amount (g): 550g Oil: - Oil (ml): - ml

See full specification

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Air conditioning stopped cooling / no response to AC button

Symptoms

A/C Technical Specifications

Other problems in Avalon

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