When the quiz or the teacher asks what “latent” heat is, there is generally some reference to it being hidden heat, which is what the word “latent” means. We then learn that it is heat energy transferred that results in a change of state rather than a temperature change. Later on, we hear a lot […]

In Florida, there are not many gas furnaces—at least not as many as up north. Sometimes, we can look like real dummies compared to techs who work on them every day. One thing to know about 80% gas furnaces with cased evaporator coils is that you can often check the evaporator coil by removing the […]

This tip was written by a 19-year service tech, Frank Mashione. Thanks, Frank. Here is a tech tip from the field that had stumped me. Luckily for me, I knew the right person to call to get back on track. This business has complained about heat calls for quite a while. I have heard other […]