left front disc brake locks up and will not release till bleeder valve is opened. When brakes are applied it will lock up again.
Check the rubber brake hoses. The inside can deteriorate and have a little flap drop down and effectively make a one way valve. When the fluid is supposed to go back to the master cylinder, the little flap is holding it in the caliper.
Thanx way2old. I installed a new hose today and it now works perfectly. However, the right side caliper is not getting any fluid at all. I'm going to assume that hose is totally collapsed and replace it next.