my Toyota Corolla E210 (2019-2024) blower motor only works on high, what’s wrong?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle battery to ensure safety while working on electrical components.
• Tools Required: Screwdriver set, multimeter, OBD-II scanner.

2. Remove Blower Motor Resistor

1. Locate the blower motor resistor, typically found under the dashboard on the passenger side.
2. Disconnect the electrical connector from the resistor.
3. Unscrew the mounting screws holding the resistor in place.
4. Remove the resistor from its housing.

3. Inspect and Replace

1. Visually inspect the blower motor resistor for any burn marks or physical damage.
2. If damaged, install the new blower motor resistor by reversing the removal steps.
3. Torque the screws to the manufacturer's specifications (usually around 5-7 Nm).

4. Reconnect Components

1. Reconnect the electrical connector to the new blower motor resistor.
2. Reconnect the vehicle battery.

5. Testing

1. Turn on the ignition and test the blower motor at all speed settings to ensure functionality.