my Skoda Octavia NFL (2020-Present) heater is not working at all, what's wrong?

Solution

1. Preparation

• Gather necessary tools: OBD-II scanner, socket set, multimeter, coolant, and replacement cabin air filter if needed.
• Ensure the vehicle is parked on a level surface and the engine is off and cool.

2. Check Coolant Level

• Locate the coolant reservoir; it is typically near the engine bay.
• Remove the cap and visually inspect the coolant level.
• If low, add the appropriate coolant mixture as specified in the owner’s manual.

3. Inspect Thermostat

• Locate the thermostat housing; remove the necessary components for access.
• Remove the thermostat and check for proper operation by testing in hot water (it should open).
• If faulty, replace with a new thermostat, ensuring the gasket is replaced and torqued to manufacturer specifications.

4. Heater Core Inspection

• Disconnect the hoses leading to the heater core; these are typically located under the dashboard.
• Inspect for leaks and use a garden hose to check for blockages; water should flow freely.
• If blocked, flush the heater core or replace it if damaged.

5. Blower Motor Functionality

• Locate the blower motor, often found under the dashboard on the passenger side.
• Use a multimeter to check for power at the blower motor connector when the heater is turned on.
• If no power is present, check the blower motor resistor and replace if necessary.
• If power is present and the motor is not functioning, replace the blower motor.

6. Cabin Air Filter Replacement

• Locate the cabin air filter compartment, usually behind the glove box.
• Remove the old filter and inspect it; replace it if it is dirty or clogged.
• Install the new filter, ensuring it is oriented correctly as per the airflow direction marked on the filter.