TL;DR
A sealed system is the hermetically closed refrigeration circuit of a refrigerator, freezer, or air conditioner: compressor, condenser, metering device, evaporator, and the refrigerant charge itself. Because it is brazed shut at the factory, opening it legally requires EPA Section 608 certification and equipment to recover refrigerant.
What it means
A sealed system is the hermetically closed refrigeration circuit of a refrigerator, freezer, or air conditioner: compressor, condenser, metering device, evaporator, and the refrigerant charge itself. Because it is brazed shut at the factory, opening it legally requires EPA Section 608 certification and equipment to recover refrigerant. Failures here, such as a leak or a dead compressor, are the most expensive class of appliance repair and often tip the decision toward replacement.
Where it sits in the glossary
Sealed system is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
License: CC-BY-4.0 — quote freely with attribution to ProFix Editorial Team / ProFix Directory.