In a refrigeration system, service technicians often confuse a liquid line restriction with an undercharge of refrigerant.

Refrigeration systems operating at a higher-than-normal discharge pressure can be the result of several different issues.

In brazing and soldering tubing, we have a few things we need to accomplish to make a proper connection.

Many new systems have no chance of long-term success due to improper installation, said Martin Hoover of Empire Heating and Air Conditioning.

Compressor failures are often a result of installation mistakes and/or poor maintenance, which means that they can usually be prevented.

This article is a summary of the skills you need to test, diagnose, and optimize an existing duct system.

Suction pressure, head pressure, subcooling, superheat, Delta T: Taking all five of these calculations into account is critical.

In this month’s troubleshooting situation, a customer has called for service, reporting that their heating system isn’t working.

Some systems we work on and install will freeze. Air conditioning is not one of them.

Let’s look at some helpful “static” pressure tests you can use on the building side of the duct system to diagnose common problems.