这个老白也还算熟悉,6 s/ S4 M% C& D3 R. Z* s2 ~9 Y% Q
1. low coolant level1 P$ L7 j7 }8 \/ r, Y2 s& P" _& [5 Z! P
2. thermostat is stuck open( V' B% j3 T, n. C( M
3. fan motor does not run well: l0 {: a& b' }7 J
4. heater contorl valve blocked1 R/ e! f3 |: t/ y0 Q; d' M) D
etc