Tshawb xyuas lub pob tshab lub tank thaum lub cav txias. Yog tias cov kua theem tseem nyob nruab nrab ntawm "F" thiab "L" cov kab cim ntawm lub tank cia, nws ua tau raws li qhov yuav tsum tau ua. Yog tias cov kua dej nyob ntawm lossis qis dua "L" kab, cov dej txias yuav tsum tau ntxiv kom cov kua qib mus txog "F" kab. Tom qab ntxiv coolant, yog hais tias lub coolant theem poob nyob rau hauv ib tug luv luv lub sij hawm ntawm lub sij hawm, nws yuav qhia tau hais tias ib tug xau. Nws yog ib qho tsim nyog los saib xyuas lub radiator, hoses, cav coolant filling cap, radiator thiab ntws valve, thiab lub twj tso kua mis dej kom pom tias muaj dej ntws tawm. Yog tias tsis pom muaj qhov xau, lub tsheb yuav tsum tau tsav mus rau qhov chaw pabcuam kev pabcuam rau kev sim ntxiv. Nws yuav tsum raug sau tseg tias txhawm rau tiv thaiv kev kub nyhiab, tsis txhob tshem lub hau radiator thaum lub cav tseem kub.