这个老白也还算熟悉,3 m$ e# G. g6 y5 C3 p. C, }4 L
1. low coolant level ) Q; t6 r2 R* G1 T% I, t9 N/ S) @, g2. thermostat is stuck open# s) Z' q+ f: D- W. v9 @
3. fan motor does not run well 2 k" N: p/ E2 A. _7 U" y4. heater contorl valve blocked1 B1 c$ l; J5 W i: r+ C! M
etc