How much does it cost to fix a car heater core? | Jerry (2023)

A functioning car heater core is essential to your comfort and ability to operate your vehicle during the winter. The cost to fix a heater core depends on whether you or a professional repairs it.

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The total cost of parts and labor will range between $800 and $1,000 to have your heater core fixed by a professional. Labor costs vary, so call ahead and get a quote from multiple repair shops.

(Video) What does it cost to replace a heater core?

If you fix the heater yourself, you’ll only have to pay for the cost of a new heater core which runs between $100 and $300. Fixing the heater core yourself will save you money but can be a challenging do-it-yourself repair due to its location within the engine bay or underneath the dashboard.

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(Video) Why does it cost so much for a new heater core?!? The CAR WIZARD shows you why!


How much does it cost to fix a heater core in a car? ›

Based on whether you fix the car heater core yourself or with the help of a professional, the cost to fix it varies. Suppose you fix it by hiring a professional, the total cost range between $800 and $1,000. For fixing the issue by yourself, the cost ranges from $100 to $300.

Can you fix a heater core without replacing it? ›

Can I repair a leaking heater core? Fixing a leaking heater core will always be much easier than replacing one. Since it is only a small leak in the heater core, we recommend simply sealing that leak and leaving your heater core in place.

Can you drive with a messed up heater core? ›

If you have a bad heater core, you should bring your car in for repairs right away. Driving with a faulty heater core can be risky, as it can lead to overheating and extensive engine damage. Even a clogged heater core can prevent proper coolant circulation, causing your engine to run hot.

Is replacing a heater core easy? ›

Heater core replacement is quite a task for a DIY mechanic, but you can do it with the right tools and enough time. Alternatively, it can be an expensive bill from your local mechanic, so it's worth a shot to save hundreds of dollars if you have some wrenching skills.

What causes a heater core to go out? ›

How does a heater core go bad? There are multiple reasons a car's heater core could not be working properly. One reason could be due to clogging, as the coolant could become contaminated if it's not regularly flushed out. Another reason for a bad heater core could be because of a leak somewhere in the system.

How serious is a heater core leak? ›

If your heater core is leaking coolant, that means the coolant level is low. As such, the engine can overheat. This is one of the main causes of mechanical breakdown. If the leak is small, you will notice a tiny trace of the antifreeze under the dashboard.

What are two signs that the heater core has failed? ›

First, the heater core could be malfunctioning and, as such, the defrosters aren't working. Second, the core could be blowing fog/smoke into your vehicle's cabin. Both are bad signs and need to be checked into right away.

How do I know if my heater core is blown? ›

Common symptoms of a bad heater core include lack of heat, frequent loss of coolant, and an overheating engine. Your car's heater core is responsible for keeping you warm in winter, heating the air in your vents, and preventing your defroster from getting, well, frosty.

What's the best way to unclog a heater core? ›

To clean the blockage, you need to flush water or air through the heater core. By doing so, the grime and dirt that's causing the clog will come out through the inlet hose. Now, insert a water hose into the outlet hose. If you have access to an air compressor, you can use that to push out the coolant and grime.

How many hours does it take to replace a heater core? ›

Replacing the heater core on a vehicle is a maintenance item that usually takes between three to eight hours to complete, depending on precisely where the heater core is located. It's usually located under and/or behind the dashboard, requiring a great deal of time to disassemble and reassemble everything.

Why is my heater blowing cold air in my car? ›

If your coolant level is a-okay, but your car heater is blowing cold air and your engine is overheating, then you have a clog in your cooling system. Conversely, if your engine temperatures are unrealistically low after a drive, your thermostat is likely the culprit.

When replacing heater core What else should I replace? ›

Before installing a new heater core, transfer any parts from the old heater core to the new one. Install the new core, reinstall or replace the mounting clamps and then the hoses as well as the heater drain tube. Once the heater core, clamps, hoses and tube are secure, you're ready to add new coolant to the radiator.

What happens when your heater core blows? ›

Your car is blowing cold air into the cabin

When a hole or puncture develops in the heater core, all that warm air may escape too quickly to reach you at the other end of the heater ducts. Depending on the size of the puncture, you might feel mildly warm, lukewarm, or absolutely freezing air coming from your heater.

How much is a heater core installed? ›

The total cost of parts and labor will range between $800 and $1,000 to have your heater core fixed by a professional. Labor costs vary, so call ahead and get a quote from multiple repair shops. If you fix the heater yourself, you'll only have to pay for the cost of a new heater core which runs between $100 and $300.

Will Blue Devil fix a heater core? ›

The Blue Devil Engine and Cooling Sealant has the remarkable ability to repair and seal leaks in freeze plugs, leaking radiators and heater cores, cracked or warped heads and fix most blown head gasket by forming a permanently seal.

Will a coolant flush fix my heat? ›

Was a coolant flush the fix? No, it is rare that flushing the cooling system will cure overheating, especially in this case as there was no history of the vehicle running on the hot side.

Can a broken heater core cause overheating? ›

While your vehicle's heating system needs coolant to warm the interior, the engine needs coolant to keep it from overheating. If there is a clogged heater core, it will keep the coolant from flowing through the engine, causing it to overheat.

Is there a fuse for the heater in my car? ›

A: Your car's heater does indeed have a fuse. You can check to see if the heater fuse is shot by looking inside your fuse box. You'll need your car's dusty manual to find out where your fuse box is and which fuse is for the heater.

Why is my car heater not blowing cold air? ›

The first thing to do if you're having issues with your car heater is to check your engine coolant. Make sure to do this when your engine has cooled down to avoid being burned. If your coolant level is too low, there won't be enough hot liquid in the heater core, resulting in cold air.

What causes a car heater not to heat? ›

In 90% of the cases, car heater problems are the result of one of the following reasons: The heater switching system might be faulty. The cabin air filter might be choked, restricting the airflow through the heater core. The thermostat valve might not be working right.

Is a heater core expensive to replace? ›

The cost to fix a heater core depends on whether you or a professional repairs it. The total cost of parts and labor will range between $800 and $1,000 to have your heater core fixed by a professional. Labor costs vary, so call ahead and get a quote from multiple repair shops.

Why is my car blowing cold air when the heat is on? ›

Low Coolant Level

The coolant (usually a mixture of water and antifreeze) in your engine doesn't just work to keep the engine from overheating: It's also the source of heat supporting the heating system. If there isn't enough coolant in your system, the heater core will blow cold air into your car.

Will Stop leak fix a heater core leak? ›

Bar's Leaks Liquid Aluminum Radiator & Heater Core Stop Leak is an easy solution to fix many heater core leaks.


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