What are the symptoms of Hissing from vents and slow loss of refrigerant in Jeep Grand Cherokee?

Slow loss of refrigerant. Vibrations or humming after turning on A/C

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Hissing from vents and slow loss of refrigerant

Q: How to fix Hissing from vents and slow loss of refrigerant in Jeep Grand Cherokee?

Replacement of O-ring seals with modified seals with increased flexibility (OEM part number 05183358AA). Before installing new gaskets, thoroughly clean the aluminum pipe seat from corrosion deposits and oxides using a fine abrasive cloth.

in Jeep Grand Cherokee (2014-2022)

Symptoms

Slow loss of refrigerant
Vibrations or humming after turning on A/C

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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 - (WK2)

Refrigerant: R134a Amount (g): 700-800g Oil: PAG 46 Oil (ml): 170 - 200ml

See full specification

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Hissing from vents and slow loss of refrigerant

Symptoms

A/C Technical Specifications

Other problems in Grand Cherokee

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