In general, the thermostat is an important component of the car that are regulating the coolant flow through the engine for enhancing its performance. When the engine is off and on, the thermostat is closed. Subsequently, it will keep the engine running at an optimum temperature. When the thermostat is failed in your Volkswagen, the following slide helps you to determine it as soon as possible.

2. Thermostat is a
small item that plays
a large role in
engine performance.

3. Moreover, it
regulates the
coolant that flows
through the engine
in Volkswagen.

4. Once you crank the
ignition on, the
thermostat will open
to regulate the
coolant’s
temperature.

5. A functioning
thermostat keeps
the engine working
at an optimum
temperature.

6. When the
thermostat is failed,
you will notice the
below signs in
Volkswagen.

7. Unusual
Temperature
Gauge Reading

8. When you first turn
on the ignition, the
temperature gauge
should display a
correct reading.

9. If the temperature
gauge is stuck
closed or open, then
it shows unusual
reading.

10. Coolant Leak

11. If the thermostat is
stuck in a closed
position, the coolant
can become backed
up.

12. Backed-up coolant
can overflow from
the thermostat
housing and start to
leak.

13. Engine
Overheating

14. Due to the bad
thermostat, the
temperature gauge
reports high
temperatures.

15. Worn thermostat
stuck in the closed
position and make
the engine overheat.

16. Reduced Fuel
Mileage

17. Failed temperature
gauge either runs
the engine hot or
cold, so the car must
work harder.

18. This additional
stress on the engine
can significantly
decrease the fuel
mileage.

19. Engine Is Too
Cold

20. If the thermostat is
stuck open, then too
much coolant flow
through the
radiator.

21. If the thermostat
won’t close, the
heater is failed and
flow cold air
through the vents.

22. Conclusion

23. If you suspect your
Volkswagen has a
faulty thermostat,
bring it to a
mechanic.

24. In this way, the
mechanic will
determine the
problem and replace
it quickly.

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