The Importance of Maintaining Vacuum Pumps With Oil Changes
Maintaining vacuum pump oil and changing it regularly is very important—especially in HVAC work. Here’s why it matters and what…
Category: Technical Services
Spring Cleaning: The Importance of Spring Maintenance
It is very important this time of year for spring maintenance for the air conditioning system.Proper annual maintenance will help…
Schematic examples of the Safety Chain for RTU’s – Part 2
Tip: click the images to open an enlarged view in another tab. Close the tab to return to the article. …
Schematic examples of the Safety Chain for RTU’s – Part 1
Tip: click the images to open an enlarged view in another tab. Close the tab to return to the article. …
The Danger of Carbon Monoxide
Carbon Monoxide is a colorless, odorless, tasteless gas that can be extremely dangerous and even deadly. Because you cannot see…
Diagnosing and Fixing Fault Code 44 on FE4 or FE5 Infinity Evolution Fan Coils
Have you ever had a fault code 44 on a FE4 or FE5 infinity or evolution fan coil? Do you…
It’s important to keep HVAC Tools Calibrated
…and not just for the “by-the-book reasons Here’s why it matters in the real world: Accurate diagnostics – Gauges, thermometers, manometers,…
The new Carrier 27VPA9
This new unit is a noncommunicating variable 5 speed performance line heat pump with InteliSense technology, 19 seer2. Sizes range…
Wiring of a VFD Fan Board at the J1 and J2 Plugs to VFD drive and to CTRL board
When you get a new VFD drive and want to install it and you see that the other one was…
Troubleshooting Codes 25-XX
Have you worked on the new 20, 21, and 23 SEER2 units and encountered a fault code 25-XX (for example,…
