my Skoda Octavia NFL (2020-Present) is overheating when idling what should I do

Solution

1. Preparation

• Ensure the engine is cool before starting work.
• Gather all necessary tools and parts.
• Disconnect the battery to prevent electrical issues during repair.

2. Coolant Level Check and Refill

• Remove the coolant reservoir cap slowly to relieve pressure.
• If low, refill with the appropriate coolant mixture (refer to owner’s manual for specifications).
• Replace the cap securely.

3. Inspect and Replace the Thermostat

• Tools Required: Socket set, torque wrench, gasket scraper
• Locate the thermostat housing; it is typically near the engine block.
• Remove the bolts securing the thermostat housing.
• Carefully lift the housing to access the thermostat.
• Replace the thermostat with a new one, ensuring the correct orientation (usually there is a small bleed hole).
• Clean any old gasket material from the housing and engine block.
• Reattach the thermostat housing and torque the bolts to specifications (usually 15-20 Nm).

4. Inspect and Test Cooling Fans

• Start the engine and let it idle, monitoring the temperature.
• Check if the cooling fans engage when the temperature rises.
• If fans do not operate, check the fan fuses and relays.
• If necessary, replace faulty fans or relays.

5. System Bleeding

• After replacing components, bleed the cooling system to remove air pockets.
• Start the engine with the radiator cap off, allowing coolant to flow and air to escape.
• Once coolant begins to flow steadily, replace the cap.