Skip to main content

R-1234yf

AIM: EPA’s HFC Authority Is On!

May 14, 2021

On December 27, 2020, President Trump signed into law the Consolidated Appropriations Act, which at $2.3 trillion is one of the largest spending bills in US history. It combines $600 billion in COVID relief with $1.4 trillion in twelve different appropriations bills. One of them is the AIM Act.
Read Article >

Pass the temperature probe

May 4, 2021

The first step is to run the A/C system for a few minutes to let it stabilize. Then both probes should be connected side by side at both points that will be temperature tested in the system. For example, if you were testing the temperature drop across the condenser, this would need to be done on both the discharge line and the liquid line.
Read Article >

Today is Earth Day

April 22, 2021

Today is Earth Day!
Read Article >

Avoiding an oily situation

April 6, 2021

If you own a mobile A/C repair shop this is when you start to gear up for it, by replenishing your parts inventories and an important segment of those inventories is compressor oil.
Read Article >

How to deal with a compressor oil viscosity change

March 30, 2021

dealing with a catastrophic compressor failure where system flushing and component replacement removes all the oil from the system, then it is a matter of just installing the correct quantity of the oil that is specified for the replacement compressor.
Read Article >

Tank full of air!

March 15, 2021

The problem is usually caused by excessive air in a system, and since too few shops use a refrigerant identifier, they don’t know when these problems come up, nor how often they are solving problems by doing this.
Read Article >

How much oil “goes” in the compressor?

March 9, 2021

There is also an additional step which is required in the oil draining process with this unit. That step is that the suction damper needs to be depressed to allow proper ventilation when draining one of these compressors.
Read Article >

Disinfecting of vehicles during COVID-19

November 10, 2020

By Ward Atkinson, MACS Technical Advisor, & Bill Hill, GM Retired Recent comments from government agencies on the COVID-19 virus issue indicate that even when a vaccine is available, our...
Read Article >

MACS talks to GDP’s Julian Hentze about mobile A/C parts, repair and more!

May 7, 2020

A conversation with MACS member Julian Hentze of GDP
Read Article >

Off-highway use of R-1234yf

December 5, 2019

By Steve Schaeber, MACS Technical Editor (29-MAY-2019) It’s been a few years since R-1234yf started showing up in passenger cars and light trucks, and while that market is getting pretty...
Read Article >