Skoda Octavia NFL (2020-Present) heater only blows cold air what's wrong

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.

2. Coolant Level Check

• Sub-steps:
  1. Open the hood and locate the coolant reservoir.
  2. Ensure that the engine is cool before opening the radiator cap to avoid burns.
  3. Check the coolant level against the markings on the reservoir. Top up with the appropriate coolant if necessary.

Tools Required:

• Coolant (as specified in the owner’s manual)

3. Leak Inspection

• Sub-steps:
  1. Visually inspect all hoses connected to the heater core for signs of leaks or damage.
  2. Check the area around the heater core for any coolant residue.
  3. If leaks are found, replace damaged hoses or heater core.

Parts Required:

• Replacement hoses or heater core (if necessary)

4. Heater Control Valve Inspection

• Sub-steps:
  1. Locate the heater control valve (usually found near the firewall).
  2. Ensure the valve is receiving power and is functioning (use a multimeter).
  3. If faulty, replace the heater control valve.

Tools Required:

• Multimeter
• Pliers

5. Thermostat Inspection

• Sub-steps:
  1. Remove the thermostat housing and inspect the thermostat for proper operation.
  2. Replace the thermostat if it is stuck open or closed.
  3. Reassemble and refill the cooling system as necessary.

Parts Required:

• New thermostat
• Gasket for the thermostat housing