why does my Volkswagen Golf MK7 (2015-2019) blower motor only work on one speed?

Solution

1. Preparation

• Gather necessary tools (OBD-II scanner, multimeter, socket set, screwdrivers).
• Ensure the vehicle is parked on a flat surface and the ignition is off.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Remove the Blower Motor Resistor

• Locate the blower motor resistor, typically found near the blower motor under the dashboard on the passenger side.
• Remove the screws or clips securing the resistor.
• Disconnect the electrical connector from the resistor.

3. Inspect and Replace the Resistor

• Use a multimeter to check for continuity across the resistor terminals. If there is no continuity, replace the resistor.
• Install a new blower motor resistor, ensuring it is securely connected with the electrical connector.
• Reattach any screws or clips that were removed.

4. Reinstall the Blower Motor Assembly

• If the blower motor needs to be serviced, remove it by unscrewing any mounting screws and disconnecting the wiring harness.
• Inspect the blower motor for any obstructions or damage. Replace if necessary.
• Reinstall the blower motor by reversing the removal steps.

5. Reconnect the Battery and Test

• Reconnect the negative battery terminal.
• Start the vehicle and test the blower motor at all speed settings to ensure proper functionality.