What is thermostat replacement?
A stuck thermostat is replaced so your engine reaches and holds the right temperature.
The thermostat opens to let coolant flow to the radiator once the engine is warm. Stuck closed, it causes overheating; stuck open, the engine runs cold, uses more fuel and the heater stays weak.
Signs you need it
- Temperature gauge rises quickly
- Engine takes ages to warm up
- Heater is weak
- Check engine light
How it works
- Drain some coolant
- Replace thermostat and gasket
- Refill and bleed
- Test temperature
You can choose a workshop visit or have a professional come to your home, work or depot.
How much does it cost?
The exact price depends on your vehicle and the job. On MYLES, each professional shows a fixed price, a starting price, a range, or sends a quote — so you can compare like for like before you book.
- Thermostat price
- Housing replacement
- Access
Tips
- Replace the thermostat when doing a cooling system service
- Never drive with the gauge in the red
Why it matters
Important: overheating causes serious damage.