How much does it cost to replace a thermostat in a car?

Author: Louisa Altenwerth  |  Last update: Friday, March 13, 2026

Car thermostat replacement time is 30 to 60 minutes, depending on the make of the car. It will cost you around $190 to $350, including labor. Thermostat repairs usually take more time, requiring extra time to diagnose and analyze the vehicle's thermostat. It can take up to 2 hours.

How much does a mechanic charge to change a thermostat in a car?

Generally, repairing a thermostat costs around $200 to $500. This is the price range you'll find for most vehicles, although some may be higher or lower depending on the circumstances. But if we're talking complete replacement, expect the price to increase by $50.

How do I know if my car thermostat is bad?

5 Signs Your Thermostat Is Broken
  1. You Notice Erratic Temperature Changes. ...
  2. You Find Incorrect Readings on the Temperature Gauge. ...
  3. Your Vehicle Makes Concerning Noises. ...
  4. You Find Coolant Leaks. ...
  5. You Notice Problems with the Heating System.

Can I drive a car with a bad thermostat?

Driving a car with a broken thermostat is not advisable. The thermostat regulates the engine's temperature by controlling the flow of coolant. If it's stuck closed, the engine can overheat, leading to severe damage such as a blown head gasket or warped cylinder head.

Can you replace a car thermostat yourself?

A car thermostat can generally be replaced without replacing the entire system. The thermostat is a small component that is responsible for regulating the flow of coolant through the engine. If the thermostat is faulty or not functioning properly, it can be replaced separately.

Cost To Replace A Car Thermostat - Why So Much? It's Not a $30 Part Anymore

Can I replace my thermostat myself?

In most cases, installing a new thermostat is a relatively simple do-it-yourself project that can result in improved comfort and convenience and one that can help you save energy.

How many hours does it take to replace a thermostat?

Installation typically takes about 1 hour.

What is the lifespan of a car thermostat?

A car thermostat is designed to last a long time – typically around 100,000 miles or 10 years. However, various factors can impact its lifespan. First, driving conditions play a role. If you regularly drive in hot weather or stop-and-go traffic, your thermostat may suffer additional stress.

How to tell if your thermostat or water pump is bad?

Here are signs you've got a bad pump or thermostat.
  1. Corroded Cooling System Parts. Both of these cooling system parts can get corroded if they start to leak slowly. ...
  2. Leaking Engine Coolant. ...
  3. Erratic Temperature Changes. ...
  4. Poor Coolant Circulation. ...
  5. Overheating Constantly.

Will a stuck thermostat throw a code?

A stuck thermostat will also trigger several indicators, warnings, and fault codes. As you read above, you'll first notice the blue low-temperature indicator that constantly stays on.

Will you get a code if your thermostat is bad?

P0128 is an extension of OBD-II code P0 which indicates a problem with your car's coolant thermostat.

How much is a new thermostat for a car?

Car thermostat replacement time is 30 to 60 minutes, depending on the make of the car. It will cost you around $190 to $350, including labor. Thermostat repairs usually take more time, requiring extra time to diagnose and analyze the vehicle's thermostat. It can take up to 2 hours.

Does the thermostat affect the AC in a car?

The thermostat is responsible for regulating the temperature of the AC system. If the thermostat is not working properly, it won't be able to regulate the temperature properly, which will cause warm air to be blown into your car.

How much should I pay to install a thermostat?

The cost to install a thermostat is $182 on average, but you could pay between $113 and $264.

What damages car thermostat?

Corrosion occurs, among other things if a wrong coolant is used. The corrosion attacks the thermostats aluminum parts that almost "etch away" (see figures 1 and 2). But also mixing of different coolants can cause corrosion. Therefore avoid mixing different types of coolant together.

How to know if it's the thermostat or radiator?

Strange Sounds and Temperature Changes

You may hear rumbling, boiling, or knocking coming from the radiator. All these signs point to an issue with your car's cooling system. The thermostat also affects the temperature of air that flows in your vehicle through the vents.

How to tell if your head gasket is blown?

There is an easy way to find out if your engine's head gasket has blown. Simply check under the oil filler cap. If the gasket is not damaged, the inside of the oil cap will be mostly dry. If you discover a milky brownish-yellow substance that is similar to the thickness of a milkshake, you probably have a gasket leak.

Can you replace the thermostat without replacing water pump?

A defective water pump cannot be repaired, it must be replaced with a new one. It is a common practice to also replace the vehicle's thermostat when doing a water pump replacement. It is not always needed, but if you suspect that your engine got hot when the water pump failed, it's a good idea to take care of it.

Can you drive your car with a bad thermostat?

If you drive with a bad thermostat, your car could overheat, causing severe and expensive engine damage. And while it's technically possible to drive without a thermostat, we don't recommend it. Your car will not reach an acceptable operating temperature, resulting in higher fuel consumption and excessive engine wear.

How long does it take to replace the thermostat?

The duration to remove and replace a thermostat can vary depending on several factors. On average, the process takes around 1 to 2 hours.

What are the symptoms of a bad thermostat?

What Are the Signs of a Bad or Broken Thermostat?
  • The AC or Furnace Won't Come On. ...
  • The HVAC System Won't Turn Off. ...
  • The Thermostat Is Unresponsive. ...
  • The HVAC System Short-Cycles. ...
  • The Room Temperature Doesn't Match the Thermostat Setting. ...
  • The Programmed Settings Reset Themselves. ...
  • Check and Adjust the Settings.

Is it easy to replace a thermostat yourself?

Your thermostat instruction manual can tell you exactly how to change a thermostat. Installing the thermostat yourself is an easy task that will typically take about an hour from start to finish.

How much does it cost to replace a water pump on a car?

A water pump replacement costs between $400 and $800 depending on the vehicle and the difficulty involved. Parts can run from $200 to $400, with labor services similarly priced. These estimates do not include taxes or shop materials, and disposal fees.

How to fix a thermostat in a car?

A very brief summary of the task:
  1. Make sure the engine is cold and raise the vehicle on jackstands.
  2. Drain the coolant. Remove and examine the hose(s)
  3. Remove the thermostat housing.
  4. Remove the old gasket/seal and replace with new.
  5. Install the new thermostat and refill the system.

Previous article
How to fix root rot from over watering?
Next article
Is it better to sauna in the morning or at night?