What are the symptoms of Unusual noise and metallic grinding when A/C is on in Citroën Jumper?

Unusual noises when A/C is turned on. Slow loss of refrigerant. Vibrations or humming after turning on A/C

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Unusual noise and metallic grinding when A/C is on

Q: How to fix Unusual noise and metallic grinding when A/C is on in Citroën Jumper?

Replacing the cracked pipe with a new revision (often with an additional vibration damper) and a mandatory inspection and possible replacement of the engine mounts. Adding rubber pads for AC cable clamps. Instead of an expensive original aluminum pipe, specialized air conditioning plants can 'cuff' a flexible (rubber) hose in place of the broken section. The rubber cable dampens vibrations better and is 3x cheaper.

in Citroën Jumper (2006-2024)

Symptoms

Unusual noises when A/C is turned on
Slow loss of refrigerant
Vibrations or humming after turning on A/C

DTC error codes

Low pressure fault

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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

z układem klimatyzacji z tyłu

Refrigerant: R134a Amount (g): 950g Oil: SP 10 PAO 68 lub PAG ISO 46 b.d. Oil (ml): 1996 – 03ml

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Unusual noise and metallic grinding when A/C is on

Symptoms

DTC error codes

A/C Technical Specifications

Other problems in Jumper

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