Troubleshooting Hot Water Zone Valves January 26, 2001 One Comment In most installations, the zone valves are in the returns.Read More
Copper Vs. Aluminum Windings in Motors January 18, 2001 One Comment Engineers question the quality and performance of copper and aluminum windings in motors.Read More
Tech Tips for Thermostatic Expansion Valves December 6, 2000 One Comment It’s never a waste of time to review TEVs — their operating principles, installation, maintenance, and troubleshooting.Read More
Using Defrost Termination and Fan Delay Controls November 30, 2000 No Comments What happens if a system doesn't have a defrost/termination/fan delay control?Read More
Wiring Basics for Residential Gas Boilers October 10, 2000 No Comments Claiming to have 265 "defective" boilers is bound to raise suspicions.Read More
Charging Methods for Metering Devices October 10, 2000 No Comments Devices used to measure subcooling, evaporator superheat, and total superheat save time, money and aggravation.Read More
Restricted Airflow: A Common Culprit September 30, 2000 No Comments Ace troubleshooters utilize service checklists as well as critical analysis to determine problems.Read More
The Role of the Metering Device September 30, 2000 No Comments There are four main components of the refrigeration cycle. Do you know what they are and how a metering device works with those components?Read More
Don't let that reversing valve outsmart you August 9, 2000 12 Comments Reversing valves can be difficult to remove because they have four solder joints to deal with at the same time and, to make matters worse, they are very heat sensitive.Read More
Superheat charging curves for technicians August 3, 2000 4 Comments Charging air conditioning systems is much different than charging refrigeration systems.Read More