这个老白也还算熟悉,1 w$ Z7 v: n- n/ k h7 s Q5 i0 I
1. low coolant level( S, ?- E% z! a7 p- _1 B
2. thermostat is stuck open 0 b! q. j% E, y: W5 Y; _+ x' b; Z3 l7 n3. fan motor does not run well/ d6 w5 U; W3 [- F1 }& c; \& i
4. heater contorl valve blocked4 l) \* L1 m) z5 p8 o: K* l6 Y! O( c- d
etc