my Volkswagen Golf MK7.5 (2020-Present) temperature gauge is in the red what to do

Solution

1. Preparation

• Tools Required: Socket set, screwdrivers, coolant funnel, OBD-II scanner.
• Allow the engine to cool down before performing any checks to avoid burns.

2. Coolant Level and Leaks

• Open the hood and locate the coolant reservoir.
• Inspect the coolant level; add the appropriate coolant type if low.
• Check for visible signs of leaks around hoses, the radiator, and the engine block. If leaks are found, identify the source for repair.

3. Thermostat Replacement (if faulty)

• Tools Required: Socket set, torque wrench, gasket scraper.
• Sub-steps:
  1. Drain the coolant from the system into a clean container.
  2. Disconnect the battery (negative terminal).
  3. Remove any components obstructing access to the thermostat (intake hose, etc.).
  4. Unbolt the thermostat housing and remove the old thermostat.
  5. Clean the mating surfaces and install the new thermostat with a new gasket.
  6. Reassemble any components that were removed and refill the coolant system.

4. Water Pump Replacement (if faulty)

• Tools Required: Socket set, coolant funnel, gasket scraper.
• Sub-steps:
  1. Drain the coolant from the system.
  2. Disconnect the battery.
  3. Remove the serpentine belt by releasing tension from the tensioner.
  4. Unbolt the water pump from the engine block and remove any attached hoses.
  5. Install the new water pump with a new gasket, ensuring proper alignment.
  6. Reassemble the serpentine belt and refill the coolant system.

5. Radiator and Cooling Fan Check

• Inspect the radiator for blockages and clean if necessary.
• Test the cooling fans by turning on the engine and checking for fan operation at temperature. Replace fans if they do not operate.