Measuring and interpreting superheat and subcooling for charging and system diagnostics.
A hunting TXV oscillates the evaporator between overfeeding and starving instead of settling on a stable superheat, and the fix depends entirely on which of […]
Low superheat paired with high subcooling is the readback of a system carrying more refrigerant than it needs, and it is more dangerous to ignore […]
High superheat with low subcooling is the quadrant technicians get wrong most often, because the instinctive response — add gas — is correct for one […]
A fixed orifice — a capillary tube or a piston — has no moving parts that respond to load, so it cannot hold superheat to […]
Technicians who treat superheat and subcooling as interchangeable “charge check” numbers end up chasing the wrong fault half the time. Each reading answers a different […]
A technician who only checks superheat is diagnosing half the refrigeration circuit. Subcooling is the reading that tells you what is happening at the condenser […]