How To Recover Freon From A Car With Vacuum Pump

How To Recover Freon From A Car With Vacuum Pump?

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Whether you’re an expert technician or a novice seeking to solve some household issues, you may be familiar with the Freon that powers air conditioning systems.

What, do you know? Freon, sometimes referred to as refrigerant gas, is non-combustible by nature and serves an essential purpose.

Freon is mostly used in cooling appliances like freezers and air conditioners, where it often evaporates to generate chilly gas.

In the end, this cold gas causes ACs and refrigerants to produce a cooling feeling.

But hold on! Freon, although its usefulness, also has negative impacts on people and the environment.

Are you interested in learning how to recover Freon using a vacuum pump?

Let’s move straight to the procedure for recovering freon.

Exactly how does Freon create the cooling effect?

Freon originally exists as a gaseous substance that aids in the process of transporting heat.

It transforms into a fluid by undergoing a temperature change while flowing through the coils. Freon’s temperature continues to drop until it transforms from a hot gas to a chilly liquid.

The heat is removed from the evaporator when hot air travels past it, leaving it much colder than before.

By the way, what is the vacuum pump?

Let’s assume for the sake of simplicity that the vacuum pump is a compressor. It primarily performs the task of releasing the gas at atmospheric pressure.

The hoover pump achieves this in what way?

It’s really that easy! The gas is initially compressed by the vacuum pump to achieve atmospheric pressure, which has a lower temperature.

Why is Freon recovery necessary?

As was previously said, Freon is crucial to the cooling process.

However, the question of why we genuinely need to recover Freon remains.

Without Freon, would our refrigerator and air conditioner fully stop working?

No! It won’t cease operating, but there will undoubtedly be a substantial loss and considerable harm as a result.

Even without Freon, your air conditioners and refrigerators would still function.

Still, when its evaporation process slows down, it would stop producing cold gas, or it would begin to suffer major damage necessitating more extensive repairs.

Freon’s reputation as a dangerous gas with negative impacts on the environment is another factor. It is the main cause of the ozone hole.

enhancing your knowledge just a tiny bit! Between the earth’s atmosphere and the sun’s dangerous UV radiation is the ozone layer.

In contrast, the loss of ozone creates a pathway for those cancer-causing UV rays that are bad for the ecosystem.

Freon gas is designed to be collected rather than released into the atmosphere because of this.

The recovery of Freon!

Depending on the technique utilised, the kind, and the size of the unit, the typical cost for Freon recovery ranges from $100 to $300.

Even if recovery is quick, utilising a recovery machine only needs 15 to 20 minutes, which is more than enough.

While in other circumstances, the relationship between time and cost might change.

Various Methods:

Freon recovery normally uses one of two techniques. Depending on your preference and comfort level, you can utilise either one.

Let’s examine both approaches in more detail!

Recovery Direct

It is the Freon recovery technique that is most frequently employed. This technique calls for the removal of the identical cooling appliance’s Freon gas as a vapour.

Later, a recovery unit uses the evacuated vapour to condense it into a liquid.

The direct recovery procedure ends there. It then moves to the recovery cylinder.

Push-pull Restoration

Now let’s discuss the push-pull recovery technique!

This process entails moving a sizable volume of liquid Freon.

The recovery unit twitches the vapours from the recovery chamber as soon as the procedure begins.

While forcing the fluid out of that specific device, it produces a high-pressure release gas.

afterwards going back into the recovery chamber from where it was retrieved.

Possibly required items for recovering Freon

You don’t need to know rocket science or have expensive equipment to recover freon, I assure you.

A vacuum pump, a manifold, a chest freezer and a manifold gauge set are all you need.

The Method – Step by Step

Here is our thorough, step-by-step instruction!

Step 1: Connect the hose

First, connect the manifold gauge to the lower end of the blue hose. It is best if the vacuum pump is also connected to the coupler.

It’s important to pay care when attaching these hoses to avoid complications later on.

Step 2:Connecting the service hose

It’s time to connect the pump’s suction hose, which is black in colour, to the yellow service line.

Evacuating the tank is step three.

You must first open the tank, hoover and low valves before you can attach any of the hoses mentioned above. The tank and the pipes are now intended to be removed.

Step 1:Disconnecting the black pipe

Only the black hose has to be disconnected from the manifold once the system has been drained.

You must make sure that your valve is shut during this stage as well.

All of your hoses—all save the black one—are now disconnected.

Step 1:Placing the chest freezer

Put your chest freezer close to the appliance you are recovering the Freon from. Place the tank into the chest freezer that was already there.

Leave the appliance on for the entire night so that the chest freezer may freeze and the appliance can cool.

Step 1:Closing the bottom valve

It’s now time to shut off the lower valve and attach the appliance’s coupler to the lower side. Pen the lower valve and coupler gradually.

Make sure the pressure does not go over a specified limit for R134a pressure at a certain temperature before opening the lower valve.

The approximate amount is 150 PSI.

Step 1:Condensing the Freon

The Freon may be drained into the tank through the bottom port by completing the above procedure. I’m here to advise that the tank’s Freon condensate has begun to form.

The pressure that remains will only be 6 PSI at 0F, or the freezing point.

Step 8: Submerge the tank in dry ice

Place the tank under dry ice right away, preferably in a bucket of dry ice. Then, after it is under dry ice, you may load it into another freezer to slow down the sublimation.

The pressure in the tank will eventually be reduced to even lower levels than 22”Hg.

Recovering the Freon will be made easier by reducing pressure. Therefore, after the recovery has been performed, shut off all the valves to finish the recovery.

You must take the following precautions:

  • Freon is dangerous to human health, therefore be sure you are not doing this operation in or close to a populated area. It comprises of substances that might harm the oesophagus or the lungs and cause cancer.
  • Remember to use a mask; as was mentioned before, Freon can harm your lungs as well.
  • To avoid electric shocks while connecting the cable, put on insulating gloves.
  • Give the work your complete attention; even a little carelessness might cost you a lot of money.


Here it is, the key to completing certain challenging tasks: recovering Freon using a vacuum pump.

You don’t need to worry at all if you can’t afford to spend a lot of money on expert services to restore your refrigerators or air conditioners.

The most practical solution, without a doubt, is to use a hoover pump for recovery, but you may carry out this laborious task at home using simple techniques.

All you have to do to complete tasks swiftly is adhere to this comprehensive guidance.

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