The document discusses how a thermostat regulates coolant flow in an engine and the signs that it may be malfunctioning. A stuck closed thermostat will cause high engine temperature readings as coolant fails to enter the engine. A stuck open thermostat allows continuous coolant flow, lowering the engine's operating temperature but reducing efficiency and increasing emissions. An inconsistently opening thermostat can cause temperature fluctuations and issues with coolant circulation that impact performance and require repair to prevent engine damage.

2. Thermostat regulates
the flow of coolant.

3. Sensor inside the
thermostat control’s its
working.

4. Coolant is vital for the
functioning of the
engine.

5. Here are the signs of a
malfunctioning
thermostat.

7. It is the first sign of a
damaged thermostat.

8. High-temperature
gauge reading when the
engine is running.

9. This means coolant is
not entering the engine.

10. As thermostat is stuck
closed, the coolant fails
to enter the engine.

12. Caused by thermostat
stuck in the open
position.

13. The coolant continuously
flows into the engine.

14. This causes lower
operating temperature
for the engine.

15. It can reduce engine
efficiency & increase
emission.

17. Temperature fluctuates
with inconsistent
coolant flow.

18. This affects engine
performance & fuel
economy.

19. Thermostat produces
inaccurate readings.

20. This causes issues with
coolant circulation.

22. This issue can damage
the engine & lead to
costly repairs.

23. Immediately take your
car for repairing the
issue.

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