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Subaru Outback Heater Core Replacement

A heater core replacement is a critical service. The cost can vary greatly depending on the year, make, and model of your car.

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Average Shop Price $428

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Learn more about Heater Cores

RepairSmith offers upfront and competitive pricing. The average cost for Subaru Outback Heater Core Replacement is $745. Drop it off at our shop and pick it up a few hours later, or save time and have our Delivery mechanics come to you.

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2017 Subaru Outback

2.5L H4 2.5i • 29,000 miles

San Francisco ,  CA 94120

$638 - $780

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2016 Subaru Outback

2.5L H4 2.5i • 78,000 miles

Loma Mar ,  CA 94021

$636 - $778

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2012 Subaru Outback

3.6L H6 3.6R Limited • 17,000 miles

Calabasas ,  CA 91302

$739 - $903

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2010 Subaru Outback

3.6L H6 3.6R • 112,000 miles

San Juan Capistrano ,  CA 92675

$642 - $784

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2016 Subaru Outback

2.5L H4 2.5i • 79,000 miles

Ojai ,  CA 93023

$695 - $849

Last Updated:
Dec 17, 2020 6:25 PM

Get A Quote 12-Month | 12,000-Mile Warranty

What is a Heater Core?

This is likely to blow your mind, so get ready. The heater core is a key part of your car’s cooling system. In theory, the coolant system in your car is very simple. The water pump sends coolant around the engine, where it absorbs heat from the hard-working motor. The coolant then flows to the radiator. Cool air is blown across the radiator, lowering the temperate of the coolant inside. The coolant can then return to the engine to absorb more heat. By doing this repeatedly, the engine stays at a safe and operable temperature, which is good for everyone. Hot engine coolant also flows through the heater core, which is a type of heat exchanger. Air is blown across the heater core by a blower motor, allowing heat to transfer from the coolant into the cabin to keep you toasty. As with so many parts of your car, time and stress can take their toll on the heater core, and eventually it might die on you. And then your engine cooling system, and interior heating system will both be compromised.

Get a Quote 1-Year | 12,000-Mile Warranty

Symptoms of a failing Heater Core

Leaks inside the car

Cars use a lot of liquid, so leaks aren’t that uncommon. The heater core, however, is the one component in your car that will leak inside of the car. You’ll likely notice it as a puddle underneath the dashboard, though you might see it slowly dripping from the dash as well. Either way, that’s a sign that your heater core is having a tough time. Similarly, you may not notice the sight of the liquid, but you might notice the smell of it. If you smell coolant in your car, it’s probably the heater core.

Heater isn’t working

Your car’s cabin heater depends on the heater core in order to work. Without the heater core, there’s no way for the climate controls to actually get hot air. So, if the heater core fails, your car won’t have any hot air, or perhaps will have only a tiny amount of hot air. Fine in July. Not so much in January.

Windows are fogging up

Your windows may fog up for two reasons if your heater core fails. First, the car often relies on hot air when defrosting the windows, so it will struggle without that air. And second, the leaking coolant can cause a slight steam that will fog the windows to the point where you may not be able to see out of the windshield.

Coolant levels are low

Look, I’m not going to tell you how to spend your time. I’m just going to tell you that it wouldn't hurt to take a few minutes to check the fluid levels in your car. You might spot small issues before they become big issues. If you notice that your coolant level is low, you probably have a leak somewhere. That leak may be from the heater core.

Engine is overheating

Or, you can just do it the less responsible way, by not monitoring your coolant level, and just waiting for your engine to overheat. Your choice.

Get a Quote 1-Year | 12,000-Mile Warranty

How urgent is a heater core replacement?

That entirely depends on whether or not you like having a properly functioning coolant system and interior heating system.

If you shivering in your car while the engine overheats, and coolant puddles on the floor mat, then there’s no urgency at all! Otherwise, yeah. You’ll want to get it fixed asap.

Get a Quote 1-Year | 12,000-Mile Warranty

Related Subaru Outback Repairs


AC Compressor Replacement AC Condenser Replacement AC Evaporator Core Replacement AC Recharge Expansion Valve Replacement Receiver Drier Replacement


Not sure? Let us diagnose

Other Repairs


Brake Caliper Replacement Brake Master Cylinder Replacement Brake Drum Replacement EGR Valve Replacement Brake Pad Sensor Replacement Brake Hose Replacement Transmission Mount Replacement Ignition Coil Replacement Oil Pressure Sensor Replacement Heater Hose Replacement Upper Intake Manifold Gasket Replacement Valve Cover Gasket Replacement Front Hub Assembly Replacement Front Lower Control Arm Replacement Rear Lower Control Arm Replacement Rear Stabilizer Bar Bushing Replacement Rear Oxygen Sensor Replacement Steering Rack and Pinion Replacement

How can we help?

RepairSmith is here to make car repair easy.

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1-Year | 12,000-Mile Warranty

Sours: https://www.repairsmith.com/i/estimates/heating-air-conditioning/heater-core-replacement/Subaru/Outback/
A couple weekends ago I replaced my heater core and radiator.
Honestly, replacing the heatercore wasn't that bad a job at all. Just takes a while to get to and put everything back. Took me about 9 hours.



The reason I started this thread is to show you guys what the inside of an old clogged up one looks like. I tried to flush mine many times, with all kinds of stuff. It just wasnt working, replacement was the only option to return heat to the passenger side.

The bottom was completely clogged with goop, had the consistency of car wax.





I scraped some out with a stick, looks like a giant booger.
There were longer rubber band like chunks in there too.
Nasty.

Moral of the story: Flush your heater core while you still can.


Last edited by Diavolo; 08-30-2015 at 05:47 PM..

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