What are the symptoms of Air conditioning stopped cooling / no response to AC button in Ford F-750?

No cold air from vents. Different temperature on both sides of the cabin. Weak or no heating in winter. No blowing from vents

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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-750?

Internal defect and seizure of compressors. As part of the service action bulletin (24P28), start the engine, turn on the maximum air flow capacity (not closed circuit) and read the evaporator temperature with the FDRS diagnostic tool. When the test shows failure (according to a special test curve), the compressor must be replaced. You should then perform a rigorous backwash of the pipelines using a special Motorcraft solvent, replace the desiccant bag and possibly clogged joints before installing and refilling the new compressor.

in Ford F-750 (2024-2025)

Symptoms

No cold air from vents
Different temperature on both sides of the cabin
Weak or no heating in winter
No blowing from vents

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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.

Open refrigerant database

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Air conditioning stopped cooling / no response to AC button

Symptoms

A/C Technical Specifications

Other problems in F-750

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