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Diagnostics & Scan Tool

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.
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Contact counts in temperature testing

April 27, 2021

Proper contact is vital when connecting to A/C lines using the contact type temperature thermometers. To determine if I am getting good contact, I always like to place both connectors side by side on the same line and observe the temperature readings.
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Tips for taking your mobile A/C system’s temperature

April 20, 2021

The contact type units do indeed have a high degree of accuracy, but precautions must be taken when using them (especially connecting to lines) to ensure the accuracy. Otherwise, it is possible to get readings that are easily 5° to 10° off and that can lead to an incorrect diagnosis.
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Temperature testing accuracy

April 13, 2021

Temperature readings can be easily used to determine if an orifice tube system might be undercharged, and they can also be used to charge an orifice tube system. But if the readings are not accurate, all they are going to do is cause you problems.
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MACS upcoming training clinic, register today!

April 7, 2021

MACS will present Peter Orlando from CARQUEST Technical Institute for a Mobile A/C Service Essentials webinar. May 13
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Does the compressor contain oil?

March 17, 2021

A question that comes up frequently on A/C tech lines is: Does the compressor contain oil and if so, how much?
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Marks Air celebrates 50 years of mobile air success

March 16, 2021

MACS member Marks Air Inc. celebrates 50 years of being in business.
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Time to plug into EV training

March 10, 2021

Read any automotive publication or website, and you will see numerous stories from all the big automotive manufacturers and quite a few shiny new start-ups about vehicle electrification.
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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.
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Learn all about electric cooling fan analytics

March 1, 2021

Learn all about electric cooling fan analytics
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