这个老白也还算熟悉,$ B( L/ D2 m% }# i
1. low coolant level ! a2 R) o |; c" b4 P9 i9 F Z' U4 Z2. thermostat is stuck open 9 T) w; ]& l2 D2 v! @' \4 H/ N" L: v4 t3. fan motor does not run well 8 U1 e, I0 l' U4 q7 ^% [" t4. heater contorl valve blocked: a5 X- H! N6 ^: K
etc