Sehatsetsi se sebetsa ka ho fetisa khase ka phaephe e telele (hangata e kobehileng ka har'a solenoid), e lumellang mocheso ho tsoa moeeng o potolohileng. Litšepe tse kang koporo li tsamaisa mocheso hantle 'me hangata li sebelisoa ho tsamaisa mouoane. E le ho ntlafatsa katleho ea sehatsetsi, li-heat sinks tse nang le ts'ebetso e ntle ea ho tsamaisa mocheso hangata li eketsoa liphaepheng ho eketsa sebaka sa ho qhala mocheso ho potlakisa ho qhala mocheso, 'me convection ea moea e potlakisoa ke fene ho tlosa mocheso. Molao-motheo oa sehatsetsi sa sehatsetsi se akaretsang ke hore compressor e hatella sehatsetsi se sebetsang ho tloha mochesong o tlase le khase e tlase ea khatello ho ea mochesong o phahameng le khase e phahameng ea khatello, ebe e qhalana mochesong o mahareng le mokelikeli o phahameng oa khatello ka condenser. Kamora hore valve ea throttle e phutholohe, e fetoha mocheso o tlase le mokelikeli o tlase oa khatello. Sehatsetsi se tlase le mokelikeli o tlase oa khatello se romeloa ho evaporator, moo evaporator e monyang mocheso 'me e fetoha mouoane mochesong o tlase le mouoane o tlase oa khatello, o fetisetsoang ho compressor hape, kahoo e phethela potoloho ea sehatsetsi. Sistimi ea ho hatsetsa ea mouoane ea mohato o le mong e entsoe ka likarolo tse 'ne tsa motheo: compressor ea ho hatsetsa, condenser, valve ea throttle le evaporator. Li hokahantsoe ka tatellano ke liphaephe ho etsa sistimi e koetsoeng. Sehatsetsi se potoloha kamehla tsamaisong, se fetola boemo ba sona 'me se fapanyetsana mocheso le lefats'e la kantle.
