HVAC Systems · Refrigeration — Charge & Diagnostics
Flash Gas
Refrigerant vapor that forms in the liquid line when the liquid drops below its saturation pressure (from pressure drop or insufficient subcooling), seen as bubbles in the sight glass. Flash gas starves the metering device and cuts capacity.
Related terms
Pro launch updates
Get notified when Pro launches, plus a monthly code-change digest. Email only — no account required.