Thermostat Troubles: Unmasking the Causes Behind Your Car’s Thermostat Failure

When your car’s thermostat stops working, it can lead to a whole host of problems. In this blog post, we’ll explore the reasons why car thermostats fail and what you can do to prevent it from happening to you.

What Is a Car Thermostat?

A car thermostat is a small but important device that regulates the flow of coolant through the engine. It does this by opening and closing a valve, which allows coolant to circulate when the engine is warm and restricts the flow when the engine is cold.

Why Does a Car Thermostat Stop Working?

There are several reasons why a car thermostat might stop working. Some of the most common causes include:

• Mechanical failure: The thermostat is a mechanical device, and like any other mechanical device, it can fail over time. The most common type of mechanical failure is when the valve sticks in the open or closed position.
• Electrical failure: The thermostat is also controlled by an electrical circuit, and a problem with this circuit can cause the thermostat to stop working.
• Corrosion: Corrosion can build up on the thermostat and its components, which can interfere with its operation.
• Coolant leaks: A coolant leak can cause the thermostat to overheat, which can damage it.

What Are the Symptoms of a Bad Car Thermostat?

There are several symptoms that can indicate a bad car thermostat. Some of the most common symptoms include:

• Overheating engine: If the thermostat is stuck in the closed position, it will restrict the flow of coolant and cause the engine to overheat.
• Underheating engine: If the thermostat is stuck in the open position, it will allow coolant to circulate even when the engine is cold, which can cause the engine to underheat.
• Erratic coolant temperature gauge: If the thermostat is not working properly, it can cause the coolant temperature gauge to fluctuate erratically.
• Poor fuel economy: A bad thermostat can also lead to poor fuel economy, as the engine will have to work harder to maintain the proper operating temperature.

How to Prevent a Car Thermostat from Failing

There are several things you can do to prevent your car thermostat from failing. Some of the most important things include:

• Regular maintenance: Regular maintenance is the best way to prevent any car problem, including thermostat failure. Make sure to have your car’s thermostat checked and replaced as needed.
• Use the right coolant: Using the wrong type of coolant can damage the thermostat and other components of the cooling system. Be sure to use the type of coolant that is recommended by your car’s manufacturer.
• Flush the cooling system: Flushing the cooling system can help to remove any debris or corrosion that could damage the thermostat. It’s a good idea to flush the cooling system every two years or so.

How to Replace a Car Thermostat

If your car’s thermostat does fail, it’s important to replace it as soon as possible. Replacing a thermostat is a relatively simple job that can be done in about an hour. Here are the steps:

1. Gather your tools and materials. You will need a new thermostat, a socket wrench, a screwdriver, and a bucket to catch the coolant.
2. Locate the thermostat. The thermostat is usually located near the water pump.
3. Drain the coolant. Open the drain plug on the radiator and allow the coolant to drain into the bucket.
4. Remove the old thermostat. Use the socket wrench to remove the bolts that hold the thermostat in place. Then, pull the thermostat out of the housing.
5. Install the new thermostat. Insert the new thermostat into the housing and tighten the bolts.
6. Fill the cooling system. Close the drain plug and fill the cooling system with the proper type of coolant.
7. Start the engine and check for leaks. Start the engine and let it run for a few minutes. Check for any leaks around the thermostat or other components of the cooling system.

What to Do If Your Car Thermostat Fails

If your car’s thermostat fails, it’s important to take action as soon as possible. Driving with a bad thermostat can damage your engine. Here are the steps to take:

1. Pull over to a safe location. If your car starts to overheat, pull over to a safe location and turn off the engine.
2. Let the engine cool down. Allow the engine to cool down for at least 30 minutes before attempting to restart it.
3. Check the coolant level. Once the engine has cooled down, check the coolant level. If the coolant is low, add more coolant until it reaches the proper level.
4. Restart the engine. Once you have added coolant, restart the engine and let it run for a few minutes. Check for any leaks around the thermostat or other components of the cooling system.
5. Call for assistance. If you are unable to fix the thermostat yourself, call for assistance. A tow truck can take your car to a mechanic who can replace the thermostat.

Summary: Keep Your Cool with a Working Thermostat

A car thermostat is a small but important part of your car’s cooling system. By understanding the reasons why car thermostats fail and taking steps to prevent it from happening, you can help to keep your engine running smoothly for years to come.

Questions You May Have

Q: How often should I replace my car thermostat?
A: It is recommended to replace your car thermostat every 50,000 to 100,000 miles.

Q: What are the signs of a bad car thermostat?
A: The signs of a bad car thermostat include overheating engine, underheating engine, erratic coolant temperature gauge, and poor fuel economy.

Q: How much does it cost to replace a car thermostat?
A: The cost to replace a car thermostat varies depending on the make and model of your car. However, the average cost is between $50 and $200.