Just in case someone finds this post an update: if you have a Deactivated timer, and you wake it in your code by a WakeTimer Action, it gets activated when it has a schedule. So what I wrote above is only valid for timers without a schedule.

Hi Karthik,

The Wake Timer Actions schedule a timer for immediate start (the actual start may still be later, e.g. when the maximum number of concurrent timers are already running), regardless of any Schedule. It does not activate a timer if it was deactivated.

If you have set a Schedule for a Timer, it will be woken automatically by the timer scheduler, unless it is deactivated. Deactivating a timer means interupting its Schedule, until it's activated again (and again, the Wake Actions won't activate a deactivated Timer!).

There are no Actions available for activating or deactivating Timers. This is handled manually via Service Center.