Joe Marchese

As A2L refrigerants enter commercial refrigeration, charge limits are driving new requirements for leak detection, system isolation, and ventilation in confined spaces. 

Discharge line mufflers may be a simple add-on, but they can make a big difference in controlling compressor noise in larger refrigeration systems. 

R-290 isn’t hard to handle — but it does require a different mindset. The key to working safely? Understanding what’s different and adjusting accordingly.  

Senior HVACR techs should actively mentor and share their experience to help develop skilled, confident technicians and strengthen the industry’s workforce. 

Ensuring proper oil return is not just a maintenance consideration; it is a fundamental design requirement for every refrigeration system. 

When replacing refrigeration components, wiring may also need updating. Techs must choose the correct wire gauge for the amperage, as well as decide between solid or stranded wire. 

Instead of replacing the entire TXV, it may be possible to just replace the power element, which can save time on the job. 

Choosing the wrong stub connection can delay a compressor install — learn the differences and why matching them saves time, money, and frustration.

Avoid shortcuts and common mistakes when troubleshooting refrigeration systems. Attention to detail not only improves your skills but also increases your value to your company.  

Fixing condensate issues may not be the hardest repair on a reach-in cooler, but it can certainly be time-consuming.