Testing AC Manifold Gauge On Different Cars - Non-working Compressor, Engine Off & Engine Running
Originally we were going to do unboxing, assembly instructions, first impression and initial reviews but we decided to to open and made sure the kit worked by hooking it up to our cars first. This video is basically a continuation of our previous video () on how to assemble, properly attach & hook up the connectors on our new VIVOHOME R134a Manifold Gauge Set. There are many kits on the market today and most of them come with vacuum pump and other accessories. Here are the #ad links to the most popular brand with a high positive ratings and five star reviews:
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We connected the gauges to 4 different cars (Honda Accord, Hyundai Santa Fe, Civc & Acura MDX) in an attempt to show you the different pressure readings - on a non working car, on a car that is idle and on a car while the engine is running. Basically how AC gauges work for beginners or HVAC-R for dummies. We would've done "everything you need to know" but we are not experts in this field. Aiman's dad is teaching him about car AC system and this young apprentice DIY'er Aiman is sharing what he learned with his youtube viewers.
When attempted to connect to our 2017 Honda Civic we realized that the low pressure port will not fit. Apparently, the 2016-2022 Civic uses R-1234yf refrigerant which is far more expensive than the R-134a that was used from 1994-2015. R-1234yf is not commonly available and now requires a license to purchase in cylinders. If you look long enough, you can find cans of it for about $60 each compared to $6 a can for R-134a. R-1234yf systems use different fittings than R-134a systems.
So What is a manifold set? Manifold gauge sets, sometimes called HVAC gauges or refrigeration gauges, diagnose and repair refrigerators or cooling systems. They measure both low- and high-refrigerant pressure with either digital or mechanical gauges to troubleshoot issues such as leaks or to help when evacuating and recharging a system.
A manifold gauge set will also let you determine if your system is fully charged or not, or if your system is losing pressure at a rate that indicates there is a large leak.
A manifold gauge set will have red, blue, and yellow hoses.
The blue is for low-pressures and the red is or high-pressures.
The yellow hose can go to either low side or high side depending on which valve is open.
What should my A C pressures be? What are normal operating pressures for 134a? An A/C System that is working properly should have 150 PSI on the high side and 30 PSI on the low side. What should AC pressure be with engine off? Pressure will equalize. High side should read the same number. Should be between 90-110 psi.
Obviously, Aiman's auto repair videos are mostly designed for entertainment purposes. Aiman is not a professional and not a certified ASE mechanic. If you're looking for instructions or steps on how to fix or diagnose problems with your car, SUV, minivan or vehicle repair, how to remove, replace or install parts, you should always watch more than just one videos. The videos should always be used only as a guide. Manufacturers always recommend using genuine OEM parts but sometimes cheaper aftermarket can be as good as the originals.
You can watch all of Aiman's auto repair videos in the following playlist:
Note: This video is NOT sponsored. Some product links are affiliate links which means if you buy something we'll receive a small commission. As an Amazon Associate we earn from qualifying purchases ().
Recording Date: October 31, 2021
This video is presented to you by Aiman-Imran Anuar. You can watch more of #Aiman_DIY_Auto_Repair videos on #EyeOnAiman Youtube Channel & Facebook Page.