Sep 29, 2026
A liquid-line restriction should cause high subcooling, right? Not always. In this short episode of the HVAC School podcast, we look at why normal subcooling does not rule out a restriction and why one familiar diagnostic pattern cannot tell the whole story.
Subcooling describes the refrigerant’s temperature margin...
Sep 24, 2026
In this episode from the 7th Annual HVACR Training Symposium, Alex Meaney delivers a live conference talk he calls “Airflow Serenity,” built around the idea of knowing which duct problems are worth chasing and which changes will actually move the needle for a customer.
He opens by describing and reframing how...
Sep 22, 2026
In this short podcast episode, Bryan talks about compression ratio and compressors, particularly why you see more suction pressure when the compressor unloads and what that means for the HVAC system's operation.
When the compressor drops into low-stage or unloads, the suction pressure goes up. Regardless of the cause of...
Sep 17, 2026
In this episode, Bryan welcomes back Louise Kellar of UEi Test Instruments for a deep dive into getting more out of a digital clamp meter than the basic volts, amps, and ohms most techs rely on every day. The tool in the spotlight is UEi's High Accuracy Clamp Meter (HAC), which is accurate when dealing with the low...
Sep 15, 2026
In this short podcast, Bryan and Roman discuss premature coil failure in ductless mini-splits and VRF equipment.
These coils are susceptible to a few different types of corrosion. Warmer coil saturation temperatures and shorter runtimes result in lower latent capacity; whatever moisture is on the coil dries on the...