my Skoda Octavia's AC only blows hot air, what should I check?

Solution

1. Preparation

• Gather tools: manifold gauge set, multimeter, OBD-II scanner, socket set, and safety goggles.
• Ensure the vehicle is parked on a level surface with the engine off.

2. Recharge Refrigerant

• Sub-steps:
  1. Connect the low-pressure side of the manifold gauge to the AC system service port.
  2. Start the engine and turn the AC to maximum cool.
  3. Check the refrigerant pressure reading; if low, proceed to recharge.
  4. Attach the refrigerant canister to the manifold gauge and open the valve to allow refrigerant into the system.
  5. Monitor the pressure gauge, stopping when it reaches the manufacturer's recommended level.

3. Repair or Replace Components

• Sub-steps:
  1. If a leak is detected, identify the source (e.g., compressor, hoses, condenser).
  2. Remove the faulty component using the socket set, ensuring all refrigerant is recovered properly.
  3. Install the new component and ensure all connections are secure.
  4. Recharge the system with refrigerant as described in the previous step.

4. Inspect and Clean Cabin Air Filter

• Sub-steps:
  1. Locate the cabin air filter access panel (usually behind the glove box).
  2. Remove the panel and take out the old filter.
  3. Inspect the new filter for proper fit and install it in the correct orientation.
  4. Reattach the access panel.