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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 Chrysler Wrangler JK?

Replacement of the entire TIPM module (very expensive) or repair by an experienced electronics technician (cutting the box and resoldering the internal relay). Before you order a compressor for a Wrangler with error P0645, supply power to the clutch from the battery 'briefly'. If it 'clicks', you have a burnt relay soldered inside the TIPM. There are bypass kits (external relay) that save thousands of zlotys from replacing the TIPM.

in Chrysler Wrangler JK (2007-2018)

Symptoms

No cold air from vents

DTC error codes

P0645

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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

(JK) 2,8 CRD/3,8 i

Refrigerant: R134a Amount (g): 510g Oil: PAG PAO 68 lub PAG ISO 46 Oil (ml): 150ml

(TJ)

Refrigerant: R134a Amount (g): 565g Oil: ND8 PAO 68 lub PAG ISO 46 Oil (ml): 240ml

Standard

Refrigerant: R134a Amount (g): 900g Oil: SP 20 PAO 68 lub PAG ISO 100 Oil (ml): 240ml

See full specification

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