henderson garage door wont stay up?
wire slings on rollers got entangeled when i untangled them,which ment i had to take them off the rollers.when i re-fitted them the garage door lifted and just came straight down,how do i get tension back on to the spring, to enable it to open easy and stay up.which direction to tighten spring and how many turns. Henderson door manual operated.
Barry T, April 2011
