My friend Craig with AC service tech llc. also has a great video on Pressure switches.
   • How HVAC Refrigerant Pressure Switche...  

My friend Bryan Orr with HVAC school https://www.achrnews.com/articles/862...
https://hvacrschool.com/the-other-pre...

achr news articles

https://www.achrnews.com/articles/126...

https://www.achrnews.com/articles/142...