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Please use tools to unscrew the top portion of the dial from the oven and check if the buzzing stops. If not, then you might need to remove the entire dial/timer from the oven and work with a watch shop to fix the timing function of the removed oven clock. Or you can request the clock specialist makes a home visit in order to fix the oven timer/clock for you instead.
According to the convection fan which does not work, I suggest checking the main oven selector, wiring and convection fan.
According to the timer you should first set the time and then verify the correctness the timer relay. If relay is open than completely oven will not work.
The problem is most likely with the Large Rectangle Grey X2 0.68uF Capacitor on the clock circuit board.
From my understanding, although they are self-healing, as they are subjected to power surges they deteriorate and allow less and less current through the circuit until they get to a point where there isn't enough current flowing to firmly latch the relay (which is why there is a buzzing from the relay turning on and off quickly).
My clock was also at the point where there wasn't enough power for the timer beeper, so when the beeper went off it would reset the clock after about half a beep. And if the clock was started at 12:00, when it got to 16:08 it would reset as there wasn't enough power to display all those led segments.
I replaced the 1000uF capacitor, which didn't change anything, then replaced the X2 capacitor and now it works perfectly!
The problem is most likely with the Large Rectangle Grey X2 Capacitor on the clock circuit board which needs to be replaced by an appliance repair person or electrician.
From my understanding, although they are self-healing, as they are subjected to power surges they deteriorate and allow less and less current through the circuit until they get to a point where there isn't enough current flowing to firmly latch the relay (which is why there is a buzzing from the relay turning on and off quickly).
My clock was also at the point where there wasn't enough power for the timer beeper, so when the beeper went off it would reset the clock after about half a beep. And if the clock was started at 12:00, when it got to 16:08 it would reset as there wasn't enough power to display all those led segments.
I replaced the 1000uF capacitor, which didn't change anything, then replaced the X2 capacitor and now it works perfectly!
its the cooling fan to keep the control and metal and top of cooker cool. mine is also extremely loud. I think it basically turns unecessarily quickly and could be slowed with a resistor in line
you must setting the count down timer instead of time of day. to set time of day. press centre button 4 times lamp flashes in bottom righthand of display. use + and - to get correct time after 10 secs time will lock in. to check you have not set count down press centre button 3 times lamp flashes top right corner of display if not at 0000 use - button to get to 0000 leave 10 secs then should revert to time of day. also check you have not entered cooking time. press centre 1x this also should read 0000. hope this helps
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