Does Running the AC Use Coolant

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Written By Nicklaus Frost

Last Updated on: 26th June 2022, 04:03 pm

All vehicles’ functionality depends on the engine. Once the engine is running hot, you see noticeable adverse effects on the drivability, including the air conditioning system. Do your car is made with two electric cooling fans? Most US vehicles have two fans for the AC condenser and radiator. On a hot day, both fans are on at idle. But, if I specify the coolant, it is a mixture of distilled water and alcohol.

As referred to as Antifreeze, it absorbs the overheat of a running engine. What happens with the coolant of the engine is running? A diagram shows that the coolant circulates through the engine and the radiator. If the AC is clogged or needs a repair, the coolant is often consumed by the vehicle. Get your auto for a repair, or else you need to shut off the AC system continuously. In reality, a shortage of refrigerant in the AC can cause severe compressor damage.

“There are many rumors about running the AC using coolant. The truth is that the AC does not use coolant till it needs a repair, but it puts a strain on the engine. Having a coolant flush performed will not make your A/C stay cooler or cause it to get warmer.”

Does coolant affect air conditioning?

Carfictions believe modern vehicle’s AC loops are not affected by coolant temperature. It happens because of the AC condenser, which is situated in front of the radiator. Two things can affect AC performance, and they are-

AC cutoff – During the extreme engine cooling demand, the engine erases the AC compressor off to make up the radiator’s heat issue. A vehicle gets old after prolonged use and gets through wear and tear on all the cooling components. Getting reduced in effectiveness will affect the AC coolant.

If an oil cooler or air cooler is situated and they create extra load in front of the condenser, it decreases the AC performance.

does car ac need coolant? Tell why

does car ac need coolant? Tell why?

Both are coolant or Antifreeze, two separate systems, and usually green, orange, or blue-colored fluid in your radiator. How does it work? On the hot summer days, your engine starts bad boiling and demands water to perform better. Even in the winter, the coolant keeps your engine from freezing. Mostly, the AC uses refrigerant or Freon to cool the vehicle’s interior. Indeed, flushing the coolant won’t make AC cool, anyway.

We often notice coolant level drops slightly, and it happens during a vehicle’s air conditioning use. Indeed, a running AC uses a prominent amount of coolant. You should investigate the part of the AC system that causes the coolant loss.

But, what’s the possible reason to make cooling systems coupled?

Sometimes, the AC stops producing additional heat to the atmosphere and often rejects heat through the condenser. Note that the condenser is established right next to the radiator. Sometimes, the coolant in the radiator remains hotter before and results in higher cooling pressure. Thus cooling pressure makes the loss of coolant. A clogged radiator is indicated to be one of the main factors to make extreme outside heat.


You can change the radiator cap or header cap as it is the cheapest way to go. Besides, be mindful of cleaning condensers and radiators eventually.

Read Also: How to Bleed off an Overcharged AC: 4 Ways to Avoid Overcharge

Will coolant make my AC colder?

Honestly, it won’t make the AC cooler, but it stops the coolant system from freezing; if you want an AC cooler, the best way to top it up with Freon. You get it available on Amazon. Check top-rated Freon now!

The Antifreeze stops the coolant from freezing itself. It happens in the winter by lowering the freezing point. There are some cons like making your car engine warmer if you use coolant for the car blower. Some vehicles fault the matrix flow control valve, and during this period, the AC blows hot airflow. Have a quick look at it below, ‘How to make an air conditioner run colder?’

does coolant help cool your car?

Undoubtedly, Getting a Coolant Flush helps a car and helps to keep a car maintained. Let’s know more about the Engine coolant below:

What is Engine Coolant? Engine coolant is renowned as Antifreeze, and it is used for removing excess heat from a car engine. How is it made anyway? A combination of ethylene or propylene glycol and water blends together in a 50/50 ratio and makes up the right coolant for your car. You must use from owner’s manual recommendation.Prestone AS105 Radiator Flush and Cleaner

As we all know, the vehicle’s engine creates a lot of heat once driving in! The exhaust and cooling system keep the engine cool. For a quick cooling opportunity, having the right coolant is essential as the coolant absorbs heat from the engine. As well as the engine coolant prevents engine water from boiling on hot days. Metal parts of a vehicle don’t get corrupted due to this coolant.

An individual can’t think of his car without the coolant. During constant internal combustion, the engine gets ruined quickly if not maintained with the engine coolant. However, it’s essential to do coolant flushes to add benefits to your cooling system. Like every other automobile parts, it’s necessary to flush a coolant once a year.

Our recommendation: You can purchase ‘Prestone AS105 Radiator Flush and Cleaner’ to keep your cooling system working effectively. Be mindful of making it safe for all cooling system metals.


  • How do I know if my car AC needs coolant?

We have an article on this question, ‘How to tell if your car AC needs Freon?’ Please, check it out!

  • Which coolant is best for AC?

There are many coolants available on the market, although R-32 refrigerant is the most popular in today’s view. This type of refrigerant helps reducing heat issues, electricity consumption, and corrosion.

  • How long does coolant last in an air conditioner?

The answer is a bit complicated; still, we have detected AC coolant lasts for a minimum of 8-10 years like AC compressor and refrigerant lifespan.

  • How to check AC coolant level in car?

It’s essential to cool down the vehicle first and then open the hood.

Then, find the coolant reservoir tank, which is constructed of high-grade plastic.

The coolant is stored inside the reservoir tank. The coolant looks red, green, blue, or yellow, depending on the specifications.

  • Can you drive a car without coolant?

Driving a car without an engine coolant can damage your engine. Having coolant in your vehicle will ensure driving safety.

Read Also: How to Remove Refrigerant From Car AC: Professional’s Guide

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