WUR out of calibration.........
 

Mortimer,

The problem with your WUR-090 won’t be noticeable now but as soon as weather gets cooler in late fall and early winter, the cold erratic idle would be annoying. And if you could live with it, then leave it as is. Your WUR-090 is out of calibration.

When you get a chance, search for the posts of “Mike in FL” and “JSZ” about their problem/s with their newly rebuilt WUR-090’s.

Tony