How to Program an NFC Control Board
When replacing a control board equipped with Near Field Communication (NFC) capabilities, it’s critical to ensure that the new board…
Author: Kevin Thigpen
Technical Services Manager
North Alabama District
How to Change the Blower Speed on an 820TB Furnace with a HK42FZ112 NFC Board
This article covers how to change the blower speed on furnaces equipped with the new NFC board HK42FZ112. After reading,…
How to Wire and Check a Dissipation Board
In our last article, Understanding Active Dissipation, we covered the basic reasons why a system may have a refrigerant leak…
Understanding Active Dissipation
Along with new refrigerant for 2025, we’re also seeing new components for safety to be compatible with new Federal guidelines. …
HVH8 Compressor Troubleshooting
The HVH8 compressor operates with 3-phase variable frequency Pulse Width Modulation (PWM). To troubleshoot a fault related to the code…
HVH8 Pressure Transducer Troubleshooting
A low-pressure transducer is used on the HVH8 to interpret PSIG and is used by the control board (AOC) for…
How to Check the CTB During a Cooling Call
The CTB (central terminal board) is a board that is often replaced unnecessarily. A CTB is simply a junction board…
Ion® Wireless Setup
Setting up a wi-fi controller is a task sometimes but the information provided will help speed this process up. The…
Ignition Proven Fault Code 6
An ignition fault is a common fault with a furnace and it could be caused by several things. For example,…
Furnace Setup Switch
This month I will be covering the Switch Setup on an 80 % Furnace N80VSL Model. The furnace control board…