How to Read a Ladder Diagram
Ladder diagrams, also known as ladder logic, are a type of electrical notation that illustrates how relays and electromechanical switches…
Category: Technical Services
Carrier VRF Static Pressure
All ducted VRF systems come from the factory set for 0” of static pressure. As we know from experience, this…
Ductless Commission/Testing In Heat Mode
Have you ever installed a mini split in the summertime? During the commission the AC would work well, but in…
The Sleeping Carrier/Bryant VRF
This month we will be covering a scenario that baffled even the Mingledorff’s VRF group for a while. Hard to…
Troubleshooting PWM Furnace Motors
The blower motor has a 115 VAC applied to it anytime the furnace is powered. First manually close the blower…
Aluminum Fin Surface Oxidation On Air-Cooling Coils
Have you ever received a call from a customer about “white flakes,” dust, or particles blowing out of ductwork in…
Heat Stroke Symptoms & Hydration Tips
As you all know, working in the AC business doesn’t always mean working in air conditioning! In this article, we…
Water Blowoff
Water blowoff is caused by unconditioned air entering the return air stream from leaks in the return duct, wall penetrations…
Introduction to Duct Design & Static Tips
What all goes into “duct design”? Most important is having a balanced system, meaning what comes in (return) must go…
Carrier VRF OH7 Error Code
On this video we will be covering the following topics Error code 0H7 Setting the outdoor unit to be able…
