Originally Posted by amc49
My '00 and '02 both work normally in the middle in summer but will not come up to the middle in good cold of winter unless driving constant like you say. Both zetec, I assumed they may slightly overcool in winter, don't care since summer here in Texas is the problem and they do great then. I have indicator lamps for low and high fans and actual a/c clutch on/off time, not unusual for car to run all day long in cold and maybe turn on low fan once for a short bit. In summer though that all changes bigtime.
Ok so it's normal then.
Also, if I drive it to normal operating temps and then have to stop and idle (like having to stop into the house for 10 mins) I come back out and the temp is down to a 1/4 and holding there until I start driving again.