You have to set the cleaning time on the clock too.
There are two small dials on the clock, one says "start" and another one says "stop".
The arrow on the "start" dial should show the same time which is shown on the clock.
Push and turn the knob on the "stop" dial to move the arrow for about three hours ahead of the clock time.
If the clock is broken, the self clean would not work.
Unfortunately the new clock is no longer available.
Gene.
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