One of my techs (Jim Walch) brought another common “double trap”-style issue to my attention: techs and installers running a drain too far into a condensate pump. When you run the system drain too deep into the pump reservoir, the water level can rise high enough to cover the drain end. That can create the […]

This article was submitted by Genry Garcia of Comfort Dynamics, Inc. It is the second part of his series on zonal pressure diagnostics. Thanks, Genry! In Part 1 of this series, we outlined the basic understanding of ZPD—what it means and what it does. Most importantly, we showed how an effort to simplify a fairly […]

In HVAC, we work with thermocouples for temperature measurement all the time, but we may not understand the difference between a thermocouple and other types of temperature measurement sensors. A thermocouple is just two different types of metal connected at a “junction” that generates a small voltage with a temperature change. Older furnaces would often […]