I have a 2 year old timer that started acting up in the last 2 weeks. Most of the time now it will not turn on when the timer hits the on pins but it always turns off when it hits the off pins. When I open the box and slightly tap to the on position it will kick on but often turns off at some point during the on cycle. It seems it is not completely clicking to the on position, like 90% there but not quite enough. Is it already shot after just 2 years or is there something I can do to fix. Thanks for any help.