Articles by John Tomczyk

In this article, we will look take a closer look at capillary tube systems, as well as how to properly clean them.

Most systems employing capillary tubes as metering devices do not require high-side receivers, which add to cost savings.

One of the more popular three-phase electrical services that is supplied to medium-size commercial buildings is the Wye or Star configuration transformer.

When it comes to servicing compressors, technicians often encounter three issues: flooding, migration, and slugging.

This is the third installment in the air conditioning troubleshooting series, and will cover how to diagnose air-side and refrigerant problems.

Troubleshooting an air conditioning system often concerns refrigerant, airflow, and mechanical problems, either individually or in combination.

This article covers air temperatures entering the condenser, inefficient compressors, and noncondensables in the refrigerant system.

When the nameplate charge is not specified, there are guidelines and techniques all technicians should follow when charging a system.

Oil-logging is often a major cause of low-side restrictions, and there are many ways in which evaporator and suction lines inside tubing can become oil-logged.

Troubleshooting the high side of a refrigeration system will often give service technicians valuable information. That’s because what happens in the condenser is a direct reflection of what is happening in the rest of the refrigeration system.