Skip to main content

Mobile A/C Training

Facts to know about the compressor clutch coil

September 7, 2021

Checking the clutch air gap before installing a compressor is an important step in compressor installation. This is because of the possibility of a clutch air gap getting knocked out of adjustment due to rough handling or it being gapped incorrectly at the factory.  These issues of course can cause problems with clutch operation.  If detected and corrected before compressor installation, a lot of time can be saved.
Read Article >

Finding right side up

August 3, 2021

Most condensers have different fittings on the inlet and outlet.  The locations of the inlet and outlet on most condensers will not allow lines to be connected incorrectly, even if the fittings do happen to be the same size.  Lastly, the designs of the mounts on most condensers prevent a unit from being installed upside down.  However, none of these characteristics apply to the condenser the technician had installed. 
Read Article >

MACS Modern HVAC textbooks in stock for back to school

July 28, 2021

MACS Modern HVAC textbooks are in stock for back-to-school purchase.
Read Article >

Come to Orlando for MACS 2021 Training Event

July 21, 2021

Pete Meier of Motor Age explains the value of attending MACS 2021 Training Event and Trade Show!
Read Article >

Top three tips on orifice tube behavior

July 20, 2021

In the last four MACS blog articles we covered a lot of detailed information about orifice tube system behavior. We examined a system with a full refrigerant charge verses a 25% undercharge. Now it is time to condense it all down into three important takeaways.
Read Article >

Truck A/C is a hot commodity

July 14, 2021

Look out on your local highway, and what do you see? Truckers getting the job done. They want their cabs to be cool in summer and warm in winter. They want the climate system to work right. There is no time for downtime. That is where we come in.
Read Article >

Low refrigerant charge and the search for real data part 4

July 13, 2021

When we examined the pressure readings and vent temperature readings last week, there was nothing showing up that indicated any charge issues (even operating with the 25% undercharge).
Read Article >

We can’t wait to see you in person!

July 8, 2021

We are just a little over two months away from the rescheduled 2021 MACS Training Event and Trade Show! We can’t wait to see you in person September 30 through October 2 at the Rosen Centre Hotel in Orlando, FL. The golf tournament will be played on September 29 at the Rosen Shingle Creek Golf Course.
Read Article >

Low refrigerant charge and the search for real data part 3

July 6, 2021

To place as much heat load on the system as possible, we turned the heat in the shop up on high and got it as hot as possible before beginning the test. When the temperature peaked at 89°, we began the test. We tried to keep it constant, but all the heat being generated by the engine in the test vehicle caused it to inch upward by 2.5° before the second test was concluded.
Read Article >

Refrigerant capacity and mobile A/C service: part 2

June 15, 2021

One of the most frequently asked questions on tech help-line calls concerns refrigerant capacity: How much refrigerant is in that mobile A/C system, and have you checked to be sure the refrigerant is pure?
Read Article >