Metering devices control every HVAC system. They regulate refrigerant flow. They create the pressure drop that makes cooling possible. Without them, nothing works.
Yet many techs struggle with metering devices. They misdiagnose TXV problems. They mount bulbs incorrectly. They chase phantom issues that start at the expansion valve.
A metering device feeds refrigerant to the evaporator. It drops pressure from the high side to the low side. That pressure drop creates the temperature change that cools the air.
Mastering these devices separates average techs from great ones. Great techs diagnose faster. They fix problems on the first visit. They avoid costly callbacks. They earn higher trust from customers.
This guide covers 6 metering devices every HVAC tech needs to understand. Each section includes how it works, where to find it, and how to troubleshoot it.
Part of the Equipment and Tools section in the HVAC Business Blog.
