[TBONE1964]

Originally Posted by tdangle

I wish it were that simple. I have a coolant overflow bottle and vented cap, the level in the radiator is to the top. Have a 50/50 mixture, fairly new water pump all new hoses and belts, new 7 blade clutch fan, and shroud. Been thru a couple of thermostats, even pulled the head on the passenger side to make sure there was no blockage.

It worked great until one day the sending unit went out and from that point on it has been driving me nuts. When its reading correctly (which is actually most of the time) it maintains the same temp whether on the highway or around town, AC on or off.

"It worked great until one day the sending unit went out"

What type of sending unit did you replace with? I would not be surprised if you got a bad one right out of the box.

You may consider trying a different one to see if the condition changes.

I have a hard time trusting new parts these days.