Sometimes we over think both the easy and hard problems, making a true system issue more difficult than it really needs to be. 

Relief valves are used to release abnormally high pressure inside a vessel before that pressure causes the vessel to erupt. 

How you handle leaving a job site is as equally important as how you handle arriving and conducting the repair or installation. 

A popular electrical component used on many control circuits is the step-down transformer. It is the power source for a separate lower-voltage circuit which typically controls the operation of a system. 

They serve two purposes: They regulate water flow to maintain the system’s high-side pressure and stop the flow of water when the system cycles off so as not to waste water.

Determining that a compressor has failed on a refrigeration system is normally a relatively simple procedure. But, discovering why the original compressor failed may not be as simple. 

There are many aspects of a technician’s job where a smartphone or tablet can be extremely useful. These devices allow a technician to search the Internet for technical information while on the job. 

Gone are the days of the three basic refrigerants: R-12, R-22, and R-502. Today’s technicians need to be well-educated on all of the refrigerants they encounter.