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Once the water is removed, the refrigerant can start the cycle all over again. This is achieved by a component known as a receiver or dryer.
Before the refrigerant can cycle back through the system, any water that may have been created in the process needs to be removed. The heated refrigerant then moves to a separate part of the system, where the gas is compressed into liquid by the compressor. When refrigerant in its cool liquid form is exposed to warm air in your vehicle’s condenser, it evaporates into a gas and absorbs or removes heat from the surrounding environment. The refrigerant in your vehicle alternates between a gaseous and liquid state. It’s important to note that a vehicle’s AC doesn’t produce cold air, it removes heat from the air entering its system. This guide will give you everything from a leak detector to a recovery unit.A car’s air conditioning works like any standard air conditioner, but on a much smaller scale. I took these the other day and they were very helpful.Īlright, the last thing I’m going to mention here is here at RefrigerantHQ we took the time to create a recommended tool listing to service your 1234yf vehicles. This website has in-depth training videos on 1234yf and will also provide a short quiz and certificate once you have completed the course. The first is called and goes over all frequently asked questions, fact sheets, and anything else you’d like to know about the refrigerant. Their are two websites that I’m going to recommend here. The first is that there is a great resource that Honeywell has provided that will show you training videos, service videos, and any and all other questions that you would have on 1234yf. There are two more points I want to make before closing this article. Yes, it’s a different refrigerant and yes you will need new tools which is always a hassle but once you get the proper equipment the actual diagnosis, repair, and replace are very close to what you do today with 134a. It’s a win win for all involved.īesides that folks 134a and 1234yf are basically the same. If we catch the leak early while the charge is still low we can save loss of refrigerant, save your shop some cash on that refrigerant, save the customer money, and also prevent further damage to the environment. The fifteen percent precharge and leak detection step is key to catching a leak on your vehicle before it has been fully charged. Well, with all things, there is a reason why these are performed. Some of you may be groaning at the extra steps when compared to R-134a.After the system has been fully charged, disconnect your lines, and reseal the valves just like your normally would.If the leak detector did not trigger any leaks with the fifteen percent charge in the system then the recovery machine will go ahead and put the rest of the refrigerant back into the system.If your vehicle has a dual system then you will also need to check your rear evaporator for leaks as well. After giving it some time to check for leaks go back to your recovery unit and alert it if you found a leak or not.While this is going on the tech will be prompted to start the blower motor on low, grab his leak detector, and then check the front evaporator inside the car for any leaks.This is known as a ‘precharge,’ of the system. Once we have passed the vacuum test the recovery unit will deliver a fifteen percent charge to the system.If it doesn’t hold then check for leaks in your system. If the vacuum holds then we move onto the next step. When beginning to charge your system the recovery machine will do a vacuum hold test that will go for around two minutes.The only differences that you will notice are: The recovery and recycling procedures on 1234yf machines are basically identical to R-134a machines.They have updated their test to include YF material. The easiest way to acquire this training is to retake your 609 certification exam through MACS Worldwide. This training will go over specific requirements and techniques when servicing either 1234yf or R-744 mobile air conditioning systems. While a new certification is not necessary there is additional training available through SAE Spec J2845.The certification is no different between R-134a and R-1234YF. If you are working at a shop then you are most likely already certified but if you are not then contact your service manager and see what steps need to be taken to get you certified. Just like before in order to legally work on an HFO-1234YF unit you will need to be section 609 certified with the Environmental Protection Agency.That being said there are a few points that I want to make: If you are familiar with 134a repairs then you should be just fine with YF repairs as well. Let me start this off with saying that a 1234yf system is VERY similar to an R-134a system.