On / Off switch broken

The retractable range ventilator stopped working in the up positiion. Removed grease filter. Removed existing CONTRL-MTR. Disconnected 2 flat control cables and connected them to new CONTRL-MTR and installed the new CONTRL-MTR. Also replaced the push button switch. Replaced grease filter. In testing the unit the ventilater would retract but not come back up unless I lifted the top trim piece with the push button switch in it and stuck a tooth pick in the hole to activate the switch. The down rod of the new pushbutton switch was too short. I then noticed the old push button switch had a very thin hard plastic tube extending the down rod. I transfered the tube to the new switch and it worked OK.