Start
Here is where your journey into HVAC nerdiness may start. Check out our latest videos, tech tips, and podcasts all in one place.
June 28, 2026
Limit Switch Troubleshooting for HVAC Techs
Limit switch troubleshooting is a must-have skill for every tech in the field. In this video, we break down how these bimetal devices work — and why they trip in the first place. From dirty filters restricting airflow to failed high-pressure switches, understanding the why behind the fault is just as important as the fix for HVAC systems.
Get Tech Tips
Subscribe to get free tech tips.
Follow Us On Social Media And Podcast Platforms
Download HVAC School App
Check our latest Tech Tips
We already know that oxy-acetylene torches have a lot of safety considerations attached: don’t oil regulator threads, bubble-test your hoses, you get the picture. But there’s one more we haven’t really covered: the 1/7 rule (or 1/10 rule, based on the latest industry guidance). This commonly cited rule reduces the likelihood of flammable acetone coming […]
Read more
When sealing ductwork or repairing HVAC insulation, the tape you choose dictates the long-term integrity of the system. Temperatures fluctuate wildly in attics and mechanical rooms, and the tape must be able to withstand these environments without degrading. To better understand how different professional-grade adhesives actually perform under elevated temperatures, we decided to put them […]
Read more
Oxy-acetylene torch tip manufacturers publish charts that tell us the ideal applications for each tip size, which is quite useful on its own. After all, a small tip may be great for a ⅜” liquid line but would hardly make a dent in 2” commercial refrigeration piping. But we can also take the information from […]
Read more
Our Most Popular Videos
