What are the symptoms of Air conditioning stopped cooling / no response to AC button in Ford F-150?

Frost or ice on pipes under the hood

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Air conditioning stopped cooling / no response to AC button

Q: How to fix Air conditioning stopped cooling / no response to AC button in Ford F-150?

The symptom was initially normal operation of the air conditioning, which after some time resulted in a complete loss of airflow (although the blower could be heard). The evaporator core was diagnosed as freezing into a block of ice due to a faulty evaporator temperature sensor reading or software errors that prevented the compressor from shutting down. The fault was solved by completely replacing the temperature sensor or the entire evaporator block, and in newer versions by updating the software of the PCM and HVAC modules.

in Ford F-150 (2015-2023)

Symptoms

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

Refrigerant specifications for this model are available in the catalog.

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Air conditioning stopped cooling / no response to AC button

Symptoms

A/C Technical Specifications

Other problems in F-150

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