KW T680 water temp stays 220 and doesnt drop even the fan is on

Have a shop check the system with an inferred temperature gun and see if its actually over heating, my guess is its not as you stated KW said it was fine with the computer hooked up. Its most likely the sending unit that send temp to the dash gauge thats gone breasts up on ya.

 

Need more info. What was outside temp. Is this something that just started happening the other day? Never did it in past?

 

When KW dealer said temp is ok. Are they saying that it is reading properly? Get yourself a Thermo heat gun, to make sure the temperature is correct. Check the radiator, bottom hose block thermostat area. If the temp is correct, could be that your thermostat is not opening all the way.

 

What engine?

 

Maybe it’s unrelated. But drive it a while with the ac off. When ac system gets hot the fan turns on.

 

When was the last time you cleaned out the rad?

 

Oops

 

Sounds to me like the coolant has poor circulation. What engine?

 

Agree, like WP shaft or impeller broken.