这个老白也还算熟悉,: y; m+ W y* b3 ]& v" J7 e
1. low coolant level 9 \" Z4 G) H" _8 b7 ^8 W2. thermostat is stuck open 4 ~1 \3 E( b1 \3 U' K3. fan motor does not run well # ?6 T3 A' n4 d( ^4. heater contorl valve blocked3 c' ~: J9 U9 H" J( o. `, [7 H/ T& y
etc