How often is a new thermostat bad?

While a thermostat doesn’t have a set lifespan, on average, you can expect them to last at least 10 years. After a decade, thermostats may start malfunctioning due to aging wiring or dust accumulation.

Can a thermostat be defective?

A faulty thermostat most likely causes it to remain in its closed position. This means when the engine is running hot and the coolant normally flows toward it, the closed thermostat will block the coolant from going into the engine. This will cause the coolant to overflow from the thermostat housing.

When a thermostat goes bad what happens?

Because your thermostat controls temperature of fluids from the radiator hose, a bad thermostat will cause your car to overheat. When the engine temperature has reached the operating level, it should allow coolant to flow to the engine and regulate the heat.

How can I tell when it’s time to replace my thermostat?

If the display is blank, make sure it has a fresh and fully-charged battery. Also make sure the circuit breaker hasn’t been tripped. Trigger the furnace or air conditioner by adjusting the thermostat at least five degrees above or below the current room temperature.

Why does the Check Engine light come back on after replacing the thermostat?

His reader indicated it was a thermostat problem. I just want to know why the check engine light came back on after the thermostat was already replaced. If the check engine light is coming on and a code like P1217 is in the computer then the computer is seeing an overheat conditions from the coolant sensor telling it your engine is overheating.

What are the symptoms of a bad thermostat?

The first and potentially most alarming symptom will be the temperature gauge reading high into the red within the first 15 minutes of your vehicle engine running. This is often the very first sign that the thermostat is not functioning properly.

What happens if you replace your car thermostat?

It can eventually cause other coolant hoses to leak as well, often resulting in coolant leaking on the ground under your vehicle. Thermostat replacement is a fairly inexpensive repair to make to your vehicle, preventing potentially thousands of dollars in engine damage due to excessive heat.

His reader indicated it was a thermostat problem. I just want to know why the check engine light came back on after the thermostat was already replaced. If the check engine light is coming on and a code like P1217 is in the computer then the computer is seeing an overheat conditions from the coolant sensor telling it your engine is overheating.

What should I do if my thermostat is not level?

To adjust the thermostat: 1 Remove the thermostat’s cover. For a mechanical thermostat with a mercury switch (a small vial filled with mercury), first use a small torpedo level to make sure the thermostat is mounted level on the wall. If it isn’t level, it won’t measure temperatures properly.

How to fix a mechanical thermostat with a mercury switch?

For a mechanical thermostat with a mercury switch (a small vial filled with mercury), first use a small torpedo level to make sure the thermostat is mounted level on the wall. If it isn’t level, it won’t measure temperatures properly. 2 Adjust the heat anticipator.

Is it time to replace the thermostat in your car?

Thermostat replacement is a fairly inexpensive repair to make to your vehicle, preventing potentially thousands of dollars in engine damage due to excessive heat. If any of the above symptoms sound familiar to you, it may be time to have an expert mechanic diagnose your vehicle.