Professor Butler

Professor Butler Husband, Father and HVAC Technician & Content Creator with 21 years HVAC experience

09/16/2026

Quick tip on how to get belt size on a energized moving exhaust fan using your phones slow-mo camera.

09/11/2026

This is a wobble stick micro switch used in HVAC equipment and controls

09/09/2026

Being mobile helps you be efficient with the SITERUNNER! Available wherever you buy your tools, or check out the link in bio! AD @‌crescent_tool

09/09/2026

BMS Service call: cooling tower fan status in alarm on building automation system on older Trane MP580 controller

09/06/2026

HVAC service call at an auto body business. No cooling space 82°. Full service call start to finish.

09/04/2026

Professor answers frequently asked questions he gets from video comments

08/28/2026

How to make a field modification on a Cool Logic Clima-cool chiller when you have to replace the differential pressure transducer for flow proving.
Thanks to my buddy Sean for giving me a hand with this project.

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08/25/2026

the F-NIRSI LPM-10A multifunction network tester makes Ethernet troubleshooting fast and accurate.
Built-in cable scan, tone trace, PoE detection, and wire map functions all in one handheld tool. Super useful
Grab one from my Amazon affiliate link.
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08/24/2026

21 years of troubleshooting
communication links and this was by far the hardest. I tried all my tricks to get 16 units back up in communicating and nothing worked. Turns out one catastrophic failure on AC-8 took out all other 16 communication boards on this old Trane isolated com3 link.
Thank you to my coworker Bob for sticking it out with me and getting these units up and running.

08/17/2026

Another day, another service call. This time, we’re taking SITERUNNER to the roof!

Available wherever you buy your tools, or check out the link in bio! AD @‌crescent_tool

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New York, NY

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