Let's take a deeper dive into the magic that is gas defrost. Most techs who are familiar with heat pumps understand the basics of a gas defrost. When we apply this strategy to a larger system where we're only reversing a small part of the system, we need to add some controls and valves to […]

We all know (or should know) that venting refrigerant is a big no-no and can result in trouble from the EPA. There are many other potential violations, but two of them can easily occur if you aren't thinking ahead at the disposal of mercury and oil. Mercury is found in fairly large quantities in the […]

This article was submitted by Genry Garcia of Comfort Dynamics, Inc. It is the final part of his series on zonal pressure diagnostics. Thanks, Genry! Updated 3/4/2022 Picking up where we left off in part 2 of the series, we discussed how a pressure reading from an attached zone indicates only the ratio of the […]