Water radiators
 

In Bf109 and He-111 the water radiators icon stays always at half level if the command is not holded open. This is not a problem with Messerschmitt as the radiators can be fully opened manually using the lever on the right side of the cockpit. In He-111, also the two switches in the cockpit stay open (or closed) only if they are holded. But during take off engines overheat and crash if the radiators are not fully opened, so I have to keep my fingers on the command until I am in flight. Is there any way to keep radiators open?