i-thermostat ilungisa ngokuzenzakalelayo inani lamanzi angena kurediyetha ngokuvumelana nezinga lokushisa lamanzi apholisayo futhi ishintsha uhla lokujikeleza kwamanzi ukuze ilungise amandla okukhipha ukushisa esistimu yokupholisa futhi iqinisekise ukuthi injini isebenza ngaphakathi kwebanga lokushisa elifanele. I-thermostat kufanele igcinwe isesimweni esihle sobuchwepheshe, ngaphandle kwalokho izophazamisa kakhulu ukusebenza okuvamile kwenjini. Uma i-valve eyinhloko ye-thermostat ivulwa sekwephuze kakhulu, izobangela ukushisa kwenjini; Uma i-valve eyinhloko ivulwa ngaphambi kwesikhathi kakhulu, isikhathi sokushisisa injini sizokwelulwa futhi izinga lokushisa lenjini lizoba phansi kakhulu.
Sekukonke, inhloso ye-thermostat ukugcina injini ingagodoli kakhulu. Isibonelo, ngemva kokuba injini isebenza kahle, injini ingase ibanda kakhulu ngesivinini sasebusika ngaphandle kwe-thermostat. Kuleli qophelo, injini idinga ukumisa okwesikhashana ukuhamba kwamanzi ukuze kuqinisekiswe ukuthi izinga lokushisa lenjini aliphansi kakhulu.