The electronic expansion valve (EEV) operates with a much more sophisticated design than a conventional TXV. Here are some electronic expansion valve basics.

In this edition of the Btu Buddy series, Bob is called to a motel that is having a chiller problem. Btu Buddy guides him through his first job on a water-cooled unit.

Measuring airflow can be difficult and time consuming, but it can be useful to troubleshooters. An easy method of measuring the airflow through a system that uses electric heaters is provided here.

In this installment of the Btu Buddy series, Bob encounters a hot hermetic compressor and learns how to troubleshoot and diagnose the system problem.

Attempting to force maintenance spending into specific lumps of time that do not meet the needs of our machines creates the need to defer maintenance. Maintenance budgets fail because budgeting authorities do not understand the disastrous consequences of deferring maintenance.

Superheat is probably the most talked about, yet misunderstood, technical term used by technicians. Superheat on the system's low side can be divided into two types: evaporator superheat and total (or compressor) superheat.

There are lots of useful tools for electrical work. To this day, we really can't tell that much about the refrigeration circuit. Here's a tool to help solve refrigeration circuit problems.

In this edition of the Btu Buddy series, Bob learns the proper procedures for finding and fixing a refrigerant leak in a residential air conditioning unit.

The function of the economizer is, as its name implies, to "economize" or save on cooling costs. Learn more about the operation of economizers and get maintenance tips here.

In this installment of the Btu Buddy series, Bob and Btu Buddy meet at the local diner for lunch and discuss electric heat and the components that operate it.