Thermostat Issues
Monitor
Thermostat fails to regulate engine temperature properly.
Monitor closely — watch for other symptoms developing.
Check These First
Before diving into diagnosis, quickly verify these:
- 1Check if engine takes too long to warm up
- 2Monitor temperature fluctuations while driving
What exactly is it doing?
Pick the description that fits best.
Thermostat Housing Leak
Fix SoonCoolant leaks from thermostat housing gasket or seals.
See causes →Thermostat Stuck Closed
Stop DrivingThermostat remains closed trapping coolant and causing rapid overheating.
See causes →Thermostat Stuck Open
MonitorThermostat remains open causing engine to run cooler than normal.
See causes →