Troubleshooting and hvacr - Articles - Page 6

Choosing, Selecting, and Utilizing a Refrigerant Leak Detector

April 27, 2023

Know what type of detector you are using, know how to use it, and ensure it’s capable of detecting leaks by calibrating it on a regular basis.

Technicians Servicing Refrigeration Equipment

What Causes High Compressor Discharge Temperatures?

Technicians must take measurements of a system in order to determine the problem

John Tomczyk

April 12, 2023

There are several reasons why a refrigeration or air conditioning system may have high compressor discharge temperatures. That’s why technicians must carefully measure the system’s temperatures and pressures to determine the problem.

When to Repair or Replace an Evaporator Coil

Where the leak is located may determine whether a coil can be repaired

Joe Marchese

April 12, 2023

When faced with a leaky coil on a reach-in cooler, a decision needs to be made whether to repair or replace it. The final decision may come down to where the leak is located.

Checklists Can Help Determine What Is Causing the Problem in a Refrigeration System

Confusing High-Side Temperatures

John Tomczyk

March 22, 2023

There are several reasons why the compressor discharge temperature of a refrigeration system can be high when the condensing temperature is not, and a checklist can help a technician figure out the root problem.

Troubleshooting Defrost Timers

A faulty defrost timer in a refrigeration system can lead to problems

Joe Marchese

February 21, 2023

Technicians should learn how to troubleshoot defrost timers, as they can be the culprit if a freezer that uses an electric heater as its supplemental heat source has a frozen evaporator coil.

Troubleshooting Potential Relays

A malfunctioning relay can damage the compressor, so techs must understand the warning signs

John Tomczyk

February 15, 2023

If a potential relay is malfunctioning, the compressor motor is in danger of not starting, stalling, locking rotor, or even burning out. That is why technicians should understand how to troubleshoot potential relays.

Electrical Troubleshooting Fundamentals for HVAC

February 3, 2023

AHR Expo session, hosted by AHR Expo on Feb. 6 at 9 a.m. in room B308.

Basic Furnace Maintenance and Troubleshooting

Layan Dahhan

January 14, 2023

The ACHR NEWS visited Flame Furnace in Warren, Michigan to learn how to do maintenance and basic troubleshooting on a furnace.

The ACHR NEWS Learns About Electrical Wiring

The NEWS’ senior managing editor visits Flame Furnace in Warren, Michigan

Maria Taylor

Layan Dahhan

December 17, 2022

The NEWS’ senior managing editor, Maria Taylor, visited Flame Furnace in Warren, Michigan to learn about electrical wiring in furnaces. Taylor then practiced her skills on a furnace simulation board.

The Trouble with TXVs: Diagnosing the Problem

Technicians need to be patient when adjusting TXVs in refrigeration systems

Justin Bailey

December 8, 2022

At one time or another, every technician has run into a refrigeration system that is not functioning properly. The question then becomes how to diagnose and determine if the problem is the TXV.