Top 32 How To Flush Ac System With Alcohol The 67 Detailed Answer

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It should work ok. I usually use brake cleaner with no problems. Just blow a lot of air through it to make sure it is all evaperated out.An airconditioning system flush solvent is prepared by mixing 60-70% heptane with 29-40% isopropyl alcohol and up to 1% fragrance. Preferably, the mixture comprises 69.5% heptane, 29.5% isopropyl alcohol and 1% fragrance.

How to flush AC system with alcohol- the flushing procedure
  1. Step 1: Empty the refrigerant. First, empty the ac system refrigerant by following the guidelines issued by the authorities.
  2. Step 2: Disconnect stuff. …
  3. Step 3: Flush the condenser. …
  4. Step 5: Flush the evaporator. …
  5. Step 6: Recharge the evaporator.

Can you flush AC system with brake cleaner?

It should work ok. I usually use brake cleaner with no problems. Just blow a lot of air through it to make sure it is all evaperated out.

What is AC flush solvent?

An airconditioning system flush solvent is prepared by mixing 60-70% heptane with 29-40% isopropyl alcohol and up to 1% fragrance. Preferably, the mixture comprises 69.5% heptane, 29.5% isopropyl alcohol and 1% fragrance.

How do I flush my AC condensate line?

Here’s a step-by-step guide on how to clean your drain line with vinegar and keep everything operating at peak performance.
  1. Turn off your air conditioner. …
  2. Locate your condensate drain line. …
  3. Identify the access point on the drain line. …
  4. Flush with distilled vinegar. …
  5. Let the solution sit for 30 minutes. …
  6. Repeat each month.

How do you flush an AC with bleach?

Using Bleach in Your AC Drain

Simply open up the drain line clean out or T on your inside unit and pour a 50/50 warm water and bleach mixture OR warm water and vinegar solution through the line. Be sure to use a minimum of 2 cups once or twice per year.

Can you use mineral spirits to flush AC system?

FLUSHING WITH MINERAL SPIRITS

Using mineral spirits may void the component Warranty. Mineral spirits are flammable. Mineral sprits are slow to evaporate so some may be left in the system. Residual flush solvent can contaminate and damage an air conditioning system!

Do you need to flush AC lines?

An A/C system flush is a necessary procedure to ensure the air conditioning system is clean and free from any contaminants. Any foreign objects in the AC system can cause blockages and prevent the compressor from operating efficiently.

Does a vehicle AC system need to be flushed when replacing the compressor?

Harmful substances and solids can form in the refrigerant circuit, leading to component damage. It is therefore absolutely essential that the air-conditioning system be flushed during repair work, and above all when exchanging the compressor.

How much AC flush do I need?

You should not need more than 1 quart of flush. The brand does not matter. They are all made from the same chemicals.

Can you flush a evaporator coil?

There are several methods to clean the interior lines of an evaporator and condenser. In small systems (up to 2 tons), a hand-oil pump can be used to flush the coils. In larger systems, it is recommended to use a circulating pump to move the coil flush through the coils.

How much does it cost to flush a car AC system?

The Average Cost to Recharge Your Car Air Conditioner Is $20 to $155, Depending on if You Go to the Mechanic or DIY. This price range is based on national averages for all vehicles and does not factor in taxes, fees, or your particular make and model.

How do I flush my AC with nitrogen?

Using the compressed nitrogen tank, connect the tank to the system and blast it into the system behind the flush solvent. The nitrogen will push the solvent through the entire system, agitating it and “scrubbing” the inside of the system.

How can I vacuum my AC without a pump?

Here are some steps to show you just how to vacuum your AC without a pump.
  1. Depressing the Access Valve. …
  2. Charging the Low-Pressure Side. …
  3. Repeat Step One (Depress the High-Pressure Side Access Valve) …
  4. Repeat the 2nd and 3rd Steps. …
  5. Charge With Refrigerant.

Is AC flush necessary?

Flushing the AC removes the contamination and protects vital A/C parts. Be sure to have the AC flushed if the system is contaminated or whenever the AC compressor is removed or replaced in your vehicle.


How To Flush Auto A/C Systems
How To Flush Auto A/C Systems


How to flush AC system with alcohol – MachineLounge

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How to flush AC system with alcohol - MachineLounge
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AC System Flush- AutoZone Car Care – YouTube

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AC System Flush- AutoZone Car Care - YouTube
AC System Flush- AutoZone Car Care – YouTube

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Viewing a thread – Will Laquer thinner work to flush AC condenser

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Viewing a thread - Will Laquer thinner work to flush AC condenser
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How To Flush Auto A/C Systems – YouTube

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Part 1 Flushing the evaporator in your automotive car truck suv jeep van A C HVAC AC A/C R4 System – YouTube

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Part 1   Flushing the evaporator in your automotive car truck suv jeep van A C HVAC AC A/C R4 System - YouTube
Part 1 Flushing the evaporator in your automotive car truck suv jeep van A C HVAC AC A/C R4 System – YouTube

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US6432903B1 – Air conditioning system flush solvent
– Google Patents

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    – Google Patents Updating …
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    – Google Patents Updating
    An air conditioning system flush solvent and associated method of flushing air conditioning systems provides enhanced removal of moisture in air conditioning systems. In a described embodiment, an air conditioning system flush solvent consists essentially of a proportion of heptane less than or equal to approximately 70% and a proportion of isopropyl alcohol greater than or equal to approximately 29%.

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Flush with alcohol? – Automotive Air Conditioning Information Forum

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What can I use to flush my AC? – Ford Truck Enthusiasts Forums

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  • Summary of article content: Articles about What can I use to flush my AC? – Ford Truck Enthusiasts Forums Run quickly away from the “AC guy” who sa to use brake flu. There are AC flush solvents available. Isopropyl alcohol or lacquer thinner … …
  • Most searched keywords: Whether you are looking for What can I use to flush my AC? – Ford Truck Enthusiasts Forums Run quickly away from the “AC guy” who sa to use brake flu. There are AC flush solvents available. Isopropyl alcohol or lacquer thinner … 1992, ac, air, alcohol, auto, car, compressor, conditioning, e150, f150, flush, ford, oil, purge, r12, r134a, rubbing, system, What can I use to flush my AC?, ford,truck,f150,forum,explorer,ranger, f250, parts, guides, reviews,stroke,diesel,2009,sale,ford-trucks,ford trucks,suv, super duty, ford trucks forum,f100,engineCooling, Heating, Ventilation & A/C – What can I use to flush my AC? – I see someone use WD40 some dont recomend it. An AC guy used brakefluid… What can I safely use to flush my ac with? I’m going to convert it from r-12 to r134a with part.no. 233-936 from SCS-/Frigrette
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Flushing an Automotive AC System –

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    Flushing an Automotive AC System –

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    I think using Denatured Alcohol was a good and economical ea. A final flush with regular AC flush hopefully removed any possible harmful … …

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    Flushing an Automotive AC System –

    Automotive Air Conditioning Bulletin Board
    I think using Denatured Alcohol was a good and economical ea. A final flush with regular AC flush hopefully removed any possible harmful … Hello,
    First post.

    I am currently working on a 2006 Dodge Caravan AC system
    Apparently, a new Evap was installed but not flushed and had significant contaminants in it that subsequently ruined the compressor in short time.

    At this point I have the AC system completely disassembled and I am flushing the system.
    I am using a

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Access Denied

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A/C flush? – MJ Tech: Modification and Repairs – Comanche Club Forums

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  • Summary of article content: Articles about A/C flush? – MJ Tech: Modification and Repairs – Comanche Club Forums You may get away using denatured alcohol but it leaves a resue and isn’t the best for an A/C system flush. Acetone is a better choice but … …
  • Most searched keywords: Whether you are looking for A/C flush? – MJ Tech: Modification and Repairs – Comanche Club Forums You may get away using denatured alcohol but it leaves a resue and isn’t the best for an A/C system flush. Acetone is a better choice but … So I plan to replace most all of the A/C system in my Comanche (and Cherokee, and Silverado). That includes the lines, compressor, condenser, receiver dryer, everything but the evaporator. A/C work is new to me, and I’ve down a lot of research, including reading stuff in this forum. It makes sens…
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How to flush AC system with alcohol

As an Amazon affiliate, we earn a commision from qualifying purchases.

Are you wondering why your AC does not seem to work as well as it used to the first day you bought it? Well, maybe there is a lot of debris trapped inside that is messing its performance.

The good news is that most of AC failures can be cured by simply flushing your system and removing that nasty dirt, even without calling your technician.

In this article, we show you how to flush AC system with alcohol effectively and get your air conditioner up and cooling again.

Let’s get started.

How to flush AC system with alcohol

Flushing your AC is arguably the best thing you can do to your AC to get it back into top shape, without spending too much time or money.

And unless your AC has some underlying mechanical problems, this should promptly restore your car’s usual cooling performance.

Why flush?

Flushing is an easy way to remove impurities and those annoying particles from the air-conditioning circuit, preventing the need for more expensive repairs down the road.

It also prevents damage to essential parts of your AC system such as the compressor and the condenser.

Of course, flushing your air conditioner is necessary every time you change the compressor (if it has come to that).

Choosing the ideal flushing liquid

Flushing your AC system should be fun especially if you do it carefully and correctly using an ideal flushing liquid that evaporates at room temperature without leaving any residue.

In this article, we have chosen denatured alcohol as our flushing liquid because it virtually leaves no residue that can hurt oil viscosity, potentially causing compressor breakdown.

Alcohol is especially great for final flushing.

You can also opt for mineral spirits, particularly if you’re searching for an economical flushing solvent or even ac flush solvent alternatives like brake cleaners for quality flushing.

How to flush AC system with alcohol- step by step

Although flushing an AC may not be a five-finger exercise, the following procedure will make your cleaning work on your air conditioning system less of a hassle.

Preliminaries

Wear protection

Never start your job without the appropriate eye protection since the flushing liquid can splash into your eyes and cause irritation and or long-term eye damage.

On top of this, remember to wear tough rubber gloves to protect your hands from irritation and other potential injuries (remember some sharp metal parts make up your AC).

Assemble the right tools for the job

At the same time, gather the appropriate tools for the job including the right refrigerant recovery device, lubricants, adjustable wrench, and an air compressor.

How to flush AC system with alcohol- the flushing procedure

Keep in mind that you should never flush the expansion valve, the accumulator, and the orifice tube because you risk damaging them.

You should also avoid flushing the compressor because it is unlikely to survive this.

Let’s now get our hands dirty!

Step 1: Empty the refrigerant

First, empty the ac system refrigerant by following the guidelines issued by the authorities.

Step 2: Disconnect stuff

Secondly, disconnect all pipes from components that you want to flush, starting with the orifice tube. For starters, the orifice tube is located in the liquid line or at the evaporator.

Also take out hoses that may get into your way, the evaporator, condenser, etc.

Step 3: Flush the condenser

Locate the high-side inlet on the condenser, pour alcohol into the unit via this hole, and start applying compressed air in there.

You don’t want alcohol to spill all over the place so get a way of catching it as it oozes out of the condenser’s outlet port.

A rag, a clean cloth, or anything similar can suffice for this.

Another good way of capturing the dirty alcohol would be via a hose connected to the exit end of the unit and directed into a collecting container.

Now, continue to pressurize the condenser until there are no more traces of contaminants in the solvent.

Step 5: Flush the evaporator

Now, flush the evaporator by repeating the steps you’ve used to flush the condenser (pouring alcohol and applying compressed air until all the debris is forced out).

Expert tip:

When flushing, you should first consider backflushing. This simply means flushing from the inlet to the outlet on evaporators and condensers to force out debris.

Thereafter, flush the units repeatedly from the outlet to inlet to ensure you have dislodged all filth.

Step 6: Recharge the evaporator

After all the dirt has been flushed out, reassemble everything, return the refrigerant, and finally test your AC for proper cooling performance.

How to flush AC system with alcohol: Useful tips

· Replace parts that need replacing

Most manufacturers recommend the replacement of components such as the drier within a set time frame.

Take advantage of the flushing process and change these parts (it’s also important that you replace the accumulator and the orifice tube, if necessary) before you recharge the system.

· Add the correct amount of lubricant

Needless to say, it’s important to add back the ounces of oil that had been removed from the various parts in the AC system when carrying out this vital maintenance task.

· Allow the parts time to dry

After you’re done with the cleaning, leave the various components out in the open so that they can dry properly.

· Check and repair any leaks

Investigate the ducts for leaks before you restore the components to their locations and patch any you have spotted up with duct tape.

Final thoughts

We believe that you now know how to flush AC with alcohol within a few minutes if you’re a fan of DIY projects.

Feel free to call in a professional mechanic if you have any doubts about some of the steps or if it looks like it might be too much work.

One more thing: Don’t forget the immense flammability hazard that alcohol is.

As such, you should avoid risky practices such as smoking while flushing the AC system with alcohol.

ALSO READ:

Will Laquer thinner work to flush AC condenser

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Will Laquer thinner work to flush AC condenser

dixonman

Posted 9/19/2009 07:35 (#852272)

Subject: Will Laquer thinner work to flush AC condenser

It’s the only thing I have around and thought someone on here said it was suitable to flush AC parts.

Indianajones

Posted 9/19/2009 07:46 (#852276 – in reply to #852272)

Subject: RE: Will Laquer thinner work to flush AC condenser

It should work ok. I usually use brake cleaner with no problems. Just blow a lot of air through it to make sure it is all evaperated out. I am sure the purists will say that it is not the right way to do it, but it has worked for me for 23 years.

Remember to add about 2 ounces of oil .

INDY

Edited by Indianajones 9/19/2009 08:02

tommyw-5088

Posted 9/19/2009 08:48 (#852321 – in reply to #852276)

Subject: Re: Will Laquer thinner work to flush AC condenser

Central Texas , York Rife Freemason thinner will work , i have used it .

AR Plowboy

Posted 9/19/2009 09:01 (#852337 – in reply to #852272)

Subject: Re: Will Laquer thinner work to flush AC condenser

East Central Arkansas East Central Arkansas Probably not the right thing to use but it seems we used rubbing alcohol when we did ours back several years ago.

Lil’ Hoss

Posted 9/19/2009 09:52 (#852371 – in reply to #852272)

Subject: Re: Will Laquer thinner work to flush AC condenser

NESD For years I used parts washer solvent for the the first pass or two if the system was badly contaminated and then the final flush was with A/C flush solvent to take the parts washer solvent out, I would think that any solvent that will clean and evaporate quickly would work just fine.

ronm

Posted 9/19/2009 11:46 (#852450 – in reply to #852276)

Subject: Re: Will Laquer thinner work to flush AC condenser

Fruita CO Ditto on the brake cleaner. The clamp-type can tappers for an R12 can will fit a brake cleaner can…

but yes, to answer your question, lacquer thinner will work, just blow it out good. Watch out for moisture in the air line….

Edited by ronm 9/19/2009 11:47

TJG in MS

Posted 9/19/2009 12:21 (#852495 – in reply to #852337)

Subject: Re: Will Laquer thinner work to flush AC condenser

Itta Bena Mississippi That’s what I’ve used for years too. Ran 2 bottles through my pickup yesterday before replacing the dryer and orfice tube. Tom

tommyw-5088

Posted 9/19/2009 12:58 (#852530 – in reply to #852337)

Subject: Re: Will Laquer thinner work to flush AC condenser

Central Texas , York Rife Freemason AR Plowboy – 9/19/2009 09:01

Probably not the right thing to use but it seems we used rubbing alcohol when we did ours back several years ago.

i have used that too, i used the thinner because i did not want to go to pharmacy for the alcohol.

plowboy

Posted 9/19/2009 14:15 (#852598 – in reply to #852272)

Subject: Re: Will Laquer thinner work to flush AC condenser

Brazilton KS Brazilton KS Propane works very well. Seems to cut the oil out better then some things. It’s cheap and it comes in a handy, pressurized bottle, too!

Indianajones

Posted 9/19/2009 15:56 (#852660 – in reply to #852598)

Subject: Re: Will Laquer thinner work to flush AC condenser

At one time, Propane was used as refridgerant in a/c systems. They also used Anhydrous Ammonia in the early systems. Should have made leak detection easy and dangerous.

INDY

ronm

Posted 9/19/2009 22:56 (#853065 – in reply to #852660)

Subject: Re: Will Laquer thinner work to flush AC condenser

Fruita CO I heard a story years ago about when they used to run propane combines in Texas. They would use it to fill tires in the field. Dude was climbing down the ladder over the tire, smoking a cigarette, when the tire blew out….burned his a** up, set the combine & field on fire. One of the major drawbacks to using propane for anything but burnin’ stuff….

Has to be true, an old Texan told me…;o)

plowboy

Posted 9/19/2009 23:37 (#853115 – in reply to #853065)

Subject: Re: Will Laquer thinner work to flush AC condenser

Brazilton KS Brazilton KS Do you really think the alcohol used to flush an A/C is any less flammable then propane?

ronm

Posted 9/20/2009 11:32 (#853498 – in reply to #853115)

Subject: Re: Will Laquer thinner work to flush AC condenser

US6432903B1 – Air conditioning system flush solvent – Google Patents

BACKGROUND

The present invention relates generally to solvents used for flushing air conditioning systems and, in an embodiment described herein, more particularly provides an air conditioning system flush solvent having enhanced effectiveness.

There are many circumstances in which an air conditioning system may be flushed with a solvent. For example, after failure of a component, such as a compressor, the air conditioning system may be flushed to remove debris from the system. The retrofitting of R-12 systems to use R-134a refrigerant generally requires the removal of mineral oil from the system, since mineral oil is used as a lubricant in R-12 systems, but is incompatible with R-134a. Additionally, the removal of excess oil and sludge in any system may be accomplished by flushing the air conditioning system with an appropriate solvent.

Another important benefit may be achieved by flushing an air conditioning system with a solvent. That benefit is the removal of moisture from the system. As is well known, moisture in an air conditioning system reduces the efficiency of the system.

Unfortunately, past air conditioning flush solvents have not been formulated specifically for enhanced effectiveness in removing moisture from air conditioning systems. For example, one known air conditioning solvent includes almost 75% heptane, approximately 5% fragrance and less than 25% isopropyl alcohol.

Therefore, it may be seen that it would be quite desirable to provide an air conditioning flush solvent which is particularly effective in removing moisture from air conditioning systems. It is an object of the present invention to provide such an air conditioning flush solvent.

SUMMARY

In carrying out the principles of the present invention, in accordance with an embodiment thereof, an air conditioning flush solvent is provided which has enhanced effectiveness in removing moisture from air conditioning systems. Associated methods of flushing air conditioning systems are also provided.

In one aspect of the invention, an air conditioning flush solvent is provided which comprises 69.5% heptane, 29.5% isopropyl alcohol and 1% fragrance. An increased proportion of isopropyl alcohol enhances the effectiveness of the flush solvent in removing moisture from an air conditioning system.

In another aspect of the invention, an air conditioning flush solvent is provided which consists essentially of 60-70% heptane and 29-40% isopropyl alcohol. The flush solvent may also include up to 1% fragrance.

These and other features, advantages, benefits and objects of the present invention will become apparent to one of ordinary skill in the art upon careful consideration of the detailed description of a representative embodiment of the invention hereinbelow.

DETAILED DESCRIPTION

All proportions described herein are by volume percent.

The inventor has discovered a formulation for an air conditioning flush solvent which accomplishes the traditional objectives of removing debris, oil and sludge from an air conditioning system, while having particular effectiveness in removing moisture from the system. Preferably, the formulation is 69.5% heptane, 29.5% isopropyl alcohol and 1% fragrance, although these proportions may be varied somewhat without departing from the principles of the present invention.

For example, the proportion of heptane may be from approximately 60% to approximately 70%. The proportion of isopropyl alcohol may be from approximately 29% to approximately 40%. The proportion of fragrance may be from 0% to approximately 1%.

For achieving the above objectives of the invention, the inventor prefers that the air conditioning flush solvent have a proportion of heptane less than or equal to 70% and a proportion of isopropyl alcohol greater than or equal to 29%.

The inventor has found that the above-described air conditioning flush solvent is useful in flushing air conditioning systems, is compatible with commonly used refrigerants and has enhanced effectiveness in removing moisture from air conditioning systems. In practice, the air conditioning system flush solvent is forced through the air conditioning system, or individual components thereof. Debris, oil, sludge and moisture are removed from the air conditioning system by the flush solvent.

WORKING EXAMPLE

An airconditioning system flush solvent is prepared by mixing 60-70% heptane with 29-40% isopropyl alcohol and up to 1% fragrance. Preferably, the mixture comprises 69.5% heptane, 29.5% isopropyl alcohol and 1% fragrance. The flush solvent is then forced through an air conditioning system, or individual components thereof, to thereby remove debris, oil, sludge and moisture from the system.

Of course, a person skilled in the art would, upon a careful consideration of the above description of an embodiment of the invention, readily appreciate that many modifications, additions, substitutions, deletions, and other changes may be made to this specific embodiment, and such changes are contemplated by the principles of the present invention. Accordingly, the foregoing detailed description is to be clearly understood as being given by way of illustration and example only, the spirit and scope of the present invention being limited solely by the appended claims.

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