Car Thermostat Replacement Cost (2026): Prices by Car, No-Heat Symptoms & NJ Tax

A car thermostat replacement costs $180 to $480 at AutoBlast in Audubon, NJ, as listed on our car heater repair page. Where you land in that range depends on how hard the thermostat housing is to reach. National guides run from $150 to $500 for a shop job (AutoZone) to $616 to $716 on RepairPal's national average, updated September 3, 2026. New Jersey adds 6.625% sales tax to both the parts and the labor.

Most Camden County drivers find a bad thermostat the first cold morning they need the heater. A thermostat stuck open lets the engine run cold, so the heater blows cool air. A thermostat stuck closed does the opposite and overheats the engine. This guide covers prices by car, how to tell which way yours failed, whether it is safe to drive, and what to ask before you approve a quote. No heat already? Call (856) 546-8880, or see our car heater repair page for the full price list.

Car Thermostat Replacement Cost: 2026 Price Table

How to read the table:

• The first row is AutoBlast's published range. Every other row is an outside benchmark, not an AutoBlast quote. The number that counts for your car is a written estimate after the cooling system has been checked.
• RepairPal says its averages leave out taxes and fees and do not adjust for location. AutoZone says labor rates run higher in areas with a higher cost of living.
• The guides disagree by hundreds of dollars because they price different things. AutoZone splits a cheap part from the labor. RepairPal's average carries a much bigger parts share, and its per-car prices below swing from $321 to $815.
• New Jersey taxes both lines of the bill. The Division of Taxation's ANJ-6, Auto Repair Shops says the charges for parts and labor in repairing automobiles are subject to New Jersey Sales Tax. At 6.625%, $180 to $480 becomes about $191.93 to $511.80.

Thermostat Replacement Cost by Car

RepairPal publishes the same job by model. All figures are before tax and are national estimates:

Look at the last two rows. The Ram's labor is lower than the Corolla's, yet its total is almost twice as high, because RepairPal prices its part at about $567 against about $128 for the Corolla. Parts, not just labor, drive the bill. Give the shop your year, make and engine when you ask for a price.

Why the Price Swings: Where the Thermostat Sits

Two things set the bill: what kind of thermostat your car has, and how much has to come off to reach it.

• Mechanical or electronic. AutoZone says the vast majority are mechanical: a wax element stays solid when the engine is cold and melts open as it warms. Cars.com says some late-model cars use computer-controlled thermostats, which cost more.
• Easy or buried. Cars.com's test: follow the upper radiator hose from the radiator to the engine. The thermostat usually sits where the hose meets the engine. If you can see that spot near the top of the engine and no wires run to it, the job should be on the cheap side. If the hose disappears into the engine bay, or wires go to the housing, expect a higher price. Cars.com says a hard-to-reach computer-controlled thermostat should be done at a shop and can cost several hundred dollars.

What a proper thermostat job includes. RepairPal lists the steps: drain the coolant, remove the thermostat housing, clean the sealing surface and replace the gasket, fit the new thermostat, refill with fresh coolant, bleed the air out, and recheck. It also says to inspect the housing for corrosion, fit the thermostat the right way round (a backwards thermostat may not open), consider the hoses, and never use a "leak stopper" product, which can clog the radiator and heater core. Because the coolant comes out, a thermostat job is also a coolant job. Our coolant flush cost guide explains coolant types and freeze protection.

Bad Thermostat Symptoms: Stuck Open or Stuck Closed?

A thermostat fails one of two ways. Your temperature gauge tells you which. Cars.com puts normal operating temperature at roughly 180 to 200 degrees Fahrenheit on most cars, which is where the needle sits around the middle.

Rule out the look-alikes. Cold vents can also come from low coolant, an air pocket, a blocked heater core or a stuck blend door. Our car heater not working guide matches eleven symptoms to their causes. RepairPal adds a warning: if a new thermostat does not fix the temperature problem right away, the cooling system needs to be checked for other faults. That is the case for testing before replacing.

Can You Drive With a Bad Thermostat?

It depends on which way it failed.

• Stuck closed: no. RepairPal says to stop driving immediately, because the engine can quickly overheat, and overheating can severely damage the engine after only a few minutes. Shut it off and have it towed.
• Stuck open: for a short while. RepairPal says it may not cause engine failure, but you will get poor performance, a weak heater and bad fuel economy, so replace it at your earliest convenience. AutoZone's short answer is that driving on a bad thermostat is "not a great idea."

In winter, a cold heater is a visibility problem. Your defroster runs on the same heat as the vents. Federal Motor Vehicle Safety Standard No. 103 requires each vehicle to have a windshield defrosting and defogging system (49 CFR 571.103). The defroster blows air across the same heater core as the vents, so a thermostat stuck open can leave it blowing cool on a cold morning.

Why Thermostat Jobs Pile Up in November

A thermostat that sticks open is easy to miss until you ask the heater for heat. Cars.com says a stuck-open thermostat keeps the engine from warming up, and in cold weather it also does not provide much heat for the cabin. That is why the problem usually shows up on the first cold mornings.

Around Audubon, those mornings come in November. NOAA's 1991 to 2020 climate normals for Philadelphia International Airport, the nearest first-order weather station, put the median first 32°F night on November 10. There is a 1 in 10 chance it has happened by October 26, and a 9 in 10 chance by November 25. December's normal low is 31.2°F and January's is 26.0°F (NOAA NCEI normals, station USW00013739).

If your gauge has been slow to reach the middle this fall, that is the time to have it looked at, before the morning the windshield will not clear.

Can You Replace a Car Thermostat Yourself?

On many cars, yes. RepairPal says the vast majority of thermostats need only simple tools. AutoZone puts a do-it-yourself job at $50 to $200 for the parts and supplies. Both name the same risks:

• The procedure varies by car. RepairPal says some engines need significant disassembly of the front of the motor, or hose-specific tools.
• Bleeding the air out matters. RepairPal says some cars need a special procedure to fill and bleed the cooling system. AutoZone warns that a thermostat that is not installed correctly, or a system that is not properly bled, can cause overheating.
• It can take longer than you think. AutoZone says a hard-to-reach thermostat can take a do-it-yourselfer several hours.

Will AutoZone do it for you? AutoZone is a parts store. Its own guide says it sells the parts, fluids and tools, and can refer you to a professional mechanic through its Shop Referral Program.

Thermostat With a Water Pump or Radiator Job: When to Bundle

A thermostat is rarely replaced on a schedule. Cars.com says it is usually changed only when it fails, because it often lasts a long time, sometimes the life of the car. The exception is when the cooling system is already open:

• Water pump or radiator replacement. Cars.com says those jobs cover most of the expense of reaching the thermostat on a high-mileage car, so adding the thermostat costs little. See our water pump replacement cost guide and radiator repair cost guide.
• Coolant flush. AutoZone suggests asking for a better price on the thermostat when a coolant flush or radiator job is already on the bill.
• After an overheat. RepairPal says plastic parts such as thermostat housings and intake manifolds can warp from overheating, so the shop should check them, and the head gasket, for leaks.

How Long Does a Thermostat Replacement Take?

AutoZone says one to three hours, depending on the vehicle and the mechanic's experience. A thermostat sitting on top of the engine is the short end. A buried one, under the intake or behind other parts, is the long end, and it is one reason quotes differ so much.

Questions to Ask Before You Approve a Thermostat Quote

1. Is it stuck open or stuck closed, and how was that confirmed?
2. Is my thermostat mechanical or computer-controlled? Is it a separate part or a full housing assembly?
3. Does the price include a new gasket, fresh coolant and bleeding the air out?
4. Is the housing corroded, and do any hoses need replacing while it is apart?
5. If the engine overheated, were the housing and the head gasket checked for leaks?
6. Is New Jersey sales tax shown on both the parts and the labor?

New Jersey Notes: Inspection and Sales Tax

The check engine light is what fails you. The NJ Motor Vehicle Commission's vehicle owner tips say New Jersey requires a biennial emissions-only inspection for passenger vehicles, and that a check engine light that stays on will fail inspection. RepairPal says a thermostat stuck open can set that light. So a bad thermostat can cost you an inspection even though the thermostat itself is not inspected. Our NJ car inspection guide covers what the inspection does check, and our guide to common check engine light codes explains the codes.

Tax applies to the whole repair. ANJ-6 says the charges for parts and labor in repairing automobiles are subject to New Jersey Sales Tax, at 6.625%. AutoBlast's $180 to $480 range is about $191.93 to $511.80 with tax.

Thermostat Replacement Near Audubon, NJ

AutoBlast is at 21 S. White Horse Pike in Audubon, NJ 08106. We serve drivers from Audubon, Haddon Heights, Collingswood, Oaklyn, Bellmawr, Barrington, Mt. Ephraim, Haddonfield, Cherry Hill, and nearby Camden County towns.

Gauge stuck low, or heat that never comes? Call (856) 546-8880 and tell us where the temperature gauge sits after a drive. Our car heater repair page lists the thermostat at $180 to $480, next to the other heater repairs.

Helpful AutoBlast pages:

• Car heater repair in Audubon, NJ
• Car heater not working: find the cause
• Car overheating: causes and repair cost
• Coolant flush cost
• Water pump replacement cost
• Radiator repair cost

Frequently Asked Questions

How much does it cost to replace a car thermostat?

At AutoBlast in Audubon, NJ, a thermostat replacement is $180 to $480, as listed on our car heater repair page; where you land depends on how hard the housing is to reach. National guides vary: AutoZone puts a shop job at $150 to $500, and RepairPal's national average is $616 to $716 (updated September 3, 2026). New Jersey adds 6.625% sales tax to the parts and the labor.

How much does it cost to replace the thermostat in a Chevy Traverse?

RepairPal puts a Chevrolet Traverse thermostat replacement at $728 to $815, updated September 3, 2026: $186 to $272 in labor and about $542 in parts, before tax. It is a national estimate, not an AutoBlast quote.

How much does it cost to replace the thermostat on a Dodge Ram 1500?

RepairPal's estimate for a Ram 1500 thermostat replacement is $687 to $742, updated July 25, 2026: $119 to $175 in labor and about $567 in parts, before tax. Your year and engine move the number.

How long does it take to replace a thermostat in your car?

AutoZone says a thermostat replacement typically takes one to three hours, depending on the vehicle and the mechanic's experience. A thermostat on top of the engine is the short end; one buried behind other parts is the long end.

What is the function of a car thermostat?

It is a valve that controls coolant flow. Cars.com explains that it stays closed while the engine is cold, so the engine warms up fast, then opens at the low end of normal operating temperature (roughly 180 to 200 degrees Fahrenheit on most cars) to send coolant to the radiator. That same warm coolant feeds the heater core, which is why a bad thermostat can leave you with no heat.

What are the symptoms of a bad thermostat?

Stuck open: the temperature gauge stays low, the heater blows cool air, fuel mileage drops, and the check engine light can come on (RepairPal). Stuck closed: the engine overheats. AutoZone adds a temperature gauge that rises and falls, and coolant leaking around the thermostat housing.

Can you drive with a bad thermostat?

It depends on how it failed. RepairPal says that if the thermostat is stuck closed, stop driving right away, because the engine can overheat and be damaged within minutes; have it towed. A thermostat stuck open may not cause engine failure, but you will get poor heat and poor fuel economy, so replace it at your earliest convenience.

Can I replace my car thermostat myself?

Often, yes. RepairPal says the vast majority of thermostats need only simple tools, though some cars need a lot of the front of the engine taken apart, and some need a special procedure to fill and bleed the cooling system. AutoZone puts a do-it-yourself job at $50 to $200 in parts and supplies, and warns that a badly installed thermostat or air left in the system can cause overheating.

Will AutoZone replace a thermostat?

AutoZone is a parts store. Its own thermostat cost guide says it sells the parts, fluids and tools, and that it can point you to professional mechanics through its Shop Referral Program if the job is too big to do yourself.

Should I replace the thermostat when I replace the water pump or radiator?

It is worth asking. Cars.com notes that when a high-mileage car needs a water pump, radiator or radiator hoses, those jobs cover most of the labor of a thermostat change, so adding the thermostat costs little. AutoZone suggests asking for a better price on the thermostat when a coolant flush or radiator job is already being done.

Will a bad thermostat make my car fail the New Jersey inspection?

It can, through the check engine light. RepairPal says a thermostat stuck open can set the check engine light, and the NJ Motor Vehicle Commission says a check engine light that stays on will fail inspection. New Jersey's passenger-car inspection is emissions-only, so the thermostat itself is not inspected.

Does New Jersey charge sales tax on a thermostat replacement?

Yes. The NJ Division of Taxation's publication ANJ-6 says the charges for parts and labor in repairing automobiles are subject to New Jersey Sales Tax. At 6.625%, AutoBlast's $180 to $480 range is about $191.93 to $511.80 with tax.

How often do thermostats need to be replaced?

Usually only when one fails. Cars.com says a thermostat is not normally replaced as a maintenance item, because it often lasts a long time, sometimes the life of the car.