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A/C works intermittently or cuts out during driving

Q: How to fix A/C works intermittently or cuts out during driving in Hyundai Santa Fe II?

Kit: Replacement of the damaged AC relay with a new one AND a clutch disc with an overheated compressor coil. If the customer assures you that the air conditioning "worked, stopped once, clicked 100 times a second and then died for good", it is not the clutch that killed itself. It was the $5 relay that fried the $100 coil. Change this contactor by repairing the front wheel.

in Hyundai Santa Fe II (2006-2012)

Symptoms

Air conditioning works intermittently

DTC error codes

Brak

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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 - (TM)

Refrigerant: R1234yf Amount (g): 550-600g Oil: PAG YF ISO 46 Oil (ml): 140 - 170ml

(DM)

Refrigerant: R1234yf Amount (g): 600g Oil: FD46XG PAO 68 AA1 lub PAG ISO 46 YF Oil (ml): 120ml

(DM)

Refrigerant: R134a Amount (g): 600g Oil: FD46XG PAO 68 lub PAG ISO 46 Oil (ml): 120ml

See full specification

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A/C works intermittently or cuts out during driving

Symptoms

DTC error codes

A/C Technical Specifications

Other problems in Santa Fe II

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