Struggling with TXV (Thermostatic Expansion Valve) diagnosis? This video dives into the essential techniques every HVAC technician needs to master for accurate system troubleshooting. Watch on YouTube or directly on the HVAC School website here: https://buff.ly/EszxdQy | HVAC School

The bulb helps a TXV maintain a constant superheat. So, what could possibly go wrong if we don't mount it correctly? Find out some TXV troubleshooting tips, including how to mount and insulate the TXV bulb, in our latest short podcast! https://buff.ly/cXlFkFa | HVAC School

Is airflow the real culprit behind your TXV issues? In our latest video, we're talking troubleshooting and signs to look for to help figure out the why behind your failed TXV. Check it out on our YouTube page or directly on the HVAC School website here: https://buff.ly/Ggk98Lu | HVAC School

LIQUID LINE RESTRICTION TROUBLESHOOTING GUIDE (for TXV systems – R-410A or R-22) If you’re seeing HIGH subcooling HIGH superheat LOW suction pressure… 99% chance you have a liquid line restriction. Here’s how to prove it fast. Common Symptoms • Suction pressure way too low • Superheat 30–60°F • Subcooling 20–40°F • Liquid line cold in one spot, warmer after • Weak airflow out of vents • Compressor super quiet (starved) Quick Checks Before You Tear Anything Apart 1. Dirty filter? Change it 2. Dir