High Priority 96% confidence

Hissing from vents and slow loss of refrigerant

in SEAT Leon (2012-2025)

Symptoms

  • Weak cabin cooling
  • Unusual noises when A/C is turned on
  • Hissing from vents
  • Musty mold odor from vents

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A/C Technical Specifications

IV - (KL)

Refrigerant: R1234yf Amount (g): 430-480g Oil: PAG YF ISO 46 Oil (ml): 120 - 140ml

III - (5F)

Refrigerant: R134a Amount (g): 450-500g Oil: PAG 46 Oil (ml): 120 - 140ml

II kompresor Denso 7SEU17C

Refrigerant: R134a Amount (g): 500 – 550g Oil: PAG PAO 68 lub PAG ISO 46 Oil (ml): 130 – 150ml
See full specification

Other problems in Leon

No heating in the cabin and different temperature from the air vents

High Priority

Air conditioning stopped cooling / no response to AC button

High Priority

A/C works intermittently or cuts out during driving

High Priority

A/C cooling is weak and gradually loses performance

High Priority

Air conditioning stopped cooling / no response to AC button

High Priority

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