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The concept of superheat
2021年10月19日
We illustrated the concept of superheat in last week's article by boiling water and superheating steam in a moonshine still. This week we will apply this concept to refrigerant in an air conditioning system. The still has been replaced with an evaporator.Read Article >
Behavioral characteristics of various compressor types pt. 2
2021年10月5日
So now it is time to provide the correct answer along with information on why it is correct and also information on why the others are incorrect.Read Article >
AEM Update: Snap application for off-highway R-1234yf
2021年9月22日
MACS will have a variety of heavy-duty and off-road presenters beginning at 8 am on Thursday, 9月30日. One will be AEM Update: Snap application for Off-highway R-1234yfRead Article >
Behavioral characteristics of various compressor types
2021年9月21日
When faced with a challenging A/C system problem, knowing what type of compressor you are dealing with can help streamline the diagnosis process.Read Article >
mac特斯拉项目
2021年8月26日
MACS is working on a project, to collect A/C charge information for Tesla vehicles, and we need your help!Read Article >
Mysterious servicing issue in R-1234yf systems
2021年8月11日,
Recently a 2017 R-1234yf Honda system, 与72年,099英里, encountering a loss of cooling (slow leak) over time would not pass the equipment charge procedure and the production amount could not be charged.Read Article >
Field study: Incorrectly installed condensers
2021年8月10日,
I have handled numerous tech calls involving older GM trucks with incorrectly installed condensers. In preparation for this series of MACS blogs, I discovered a salvage truck with one of these condenser repairs. This gave me the opportunity to duplicate the incorrect installation and look for pitfalls and solutions.Read Article >
Top three tips on orifice tube behavior
2021年7月20日
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 >
Low refrigerant charge and the search for real data part 4
2021年7月13日
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 >
Low refrigerant charge and the search for real data part 3
2021年7月6日
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 >