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A/C cooling is weak and gradually loses performance

Q: How to fix A/C cooling is weak and gradually loses performance in Dacia Spring?

Diagnosis of tightness of the air conditioning system, localization and removal of leaks, replacement of damaged pipes or condenser, vacuum filling of the system with dedicated non-conductive POE oil and refrigerant to restore cooling of the battery and the cabin.

in Dacia Spring (2021-2025)

Symptoms

A/C cooling is weak and gradually loses performance

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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

Wszystkie wersje

Refrigerant: R1234yf Amount (g): 475g Oil: POE (nieprzewodzący) Oil (ml): 120ml

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A/C cooling is weak and gradually loses performance

Symptoms

A/C Technical Specifications

Other problems in Spring

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