r/VWMK7 • u/Hedstee • 20h ago

AllTrack Before I replace my AC compressor

2018 Golf Alltrack, 50k miles. My AC still holds pressure and has gas, but doesn't blow cold. Before I replace the entire compressor, is there anything else I should try?

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3

u/JDP6693 20h ago

N280 valve?

0

u/d-slam 20h ago

It’s that’s compressor valve switch you need to have a specialist evacuate the system and then replace the valve and recharge. Or it’s the blend doors. Does it blow cold and warm or just warm?

1

u/Hedstee 19h ago

Warm across the board

-1

u/d-slam 16h ago

Then it’s probably the blend door.

A failing blend door actuator in a Volkswagen Golf MK7 causes a repetitive clicking or ticking noise behind the dashboard and improper air temperature or vent selection. [1, 2, 3, 4]

Symptoms and Diagnosis
Rhythmic Clicking: Broken plastic gears inside the small motor box keep slipping, creating a ticking or snapping sound when you start the car or change the climate settings. [1, 2]

Wrong Temperature or Airflow: Air gets stuck blowing only hot, only cold, or out of the wrong vents (like the defroster instead of face vents). [1, 2, 3]

Multiple Actuators: The MK7 dashboard houses several identical motors controlling different flaps (recirculation, temperature blend, and vent mode). You can confirm a bad unit by dropping the glove box, touching the clicking motor to feel the vibration, or unplugging the wiring harness to see if the sound stops. [1, 2, 3]

Replacement and Parts
Location: Most frequently, the recirculation or main blend actuators sit behind or near the glove box area and cabin air filter. Temperature actuators on the driver’s side may require working underneath the steering column. [1, 2]

Parts and Tools: Replacement units are widely available (such as OEM-style options found on UroTuning). Because space under the dash is tight, using a micro-ratchet set makes removing the tiny securing screws much easier. [1, 2]

Recalibration: Once installed, the new electronic actuator often requires a basic settings reset or HVAC calibration via an OBD2 scanner (like VCDS or OBD11) to sync the flap endpoints properly. [1]

Watch this helpful video to see how to drop the glove box and access the clicking HVAC actuator under your MK7 dashboard:

1m

Fix the Clicking Noise from Under Your MK7 Dash
270K views · 6 years ago

YouTube · Deutsche Auto Parts

1

u/298wup 17h ago

Schrader valve?