Normal
There's nothing mechanical in the switch so WD-40 won't help.If it stops when you pull the centre it means the pushrod is pressing on the valve diaphragm.If it doesn't then the valve diaphragm is worn.
There's nothing mechanical in the switch so WD-40 won't help.
If it stops when you pull the centre it means the pushrod is pressing on the valve diaphragm.
If it doesn't then the valve diaphragm is worn.
