Oven won't work beacuse of the timer on the stove.

Try turning the mains supply off and it will probably reset everything.

Try turning the power off to the oven totally and leaving it for a few mins, then turn it back on. If this doesn't work you may have to have a new clock/timer. espares used to have them. If you don't see it listed, send in a request.

Both the top and bottom oven will only work if a time (any time) has been set on the clock. Setting the time operates a contact to switch the power through. The only exception is the grill. This will work even if the time has not been set. So if the oven controls/lights and heating work, to me it means that the clock/timer is half working and the only thing that isn't is the display.
I haven't had the clock/timer to bits but a fellow blogger has said that in some timers there is an electrolytic capacitor that controls the display. When this fails as they are renowned for doing, the dispaly mal functions. If there is one then Maplin have some - VHR41W/43W and DT64U depending on value etc. Let us know how you get on.
If you need a new clock/timer they are around £80 from espares.

I think that the ONLY problem is to set properly the TIMER; The TIMER is set OFF and the OVEN does not work; try to push and/or release the timer buttons and it will work. I have the same problem and it is very unfortunate that I have no manuals.....

What happens when you turn the power off to the whole oven, leave it off for a few mins and then reapply? If the automatic is still set it could be the clock is faulty.
Have you tried resetting the clock as per the handbook?

Try unplugging the oven and let sit for 10 min. This will reset the curcuit board and reboot the electronics. You may have to pull out the stove o get to the cord.

The normal STOVES label is on the rear of the oven, but there should be a small label visible on the left hand side of the lower oven when you lower the door. There should be a long product number on that with the unit serial number. The product no can be used to identify the unit. STOVES may be able to help here.
I have a 720EF handbook scanned and it is on my BT Digital Vault, so if you want this version give me a valid email address and I will ensure you receive a copy.

I believe the control's child lock function is enabled. To disable it, press and hold the cancel key (will have small padlock icon under the word "cancel"). That should clear the condition.

Hi.
If the fan is working o/k, then in all probability the fan oven element has failed.

A common problem with fan assisted ovens.

It is a fairly easy job to replace same

if the timer is on hit cancel or reset then hit clock and then use up and down arrows to set them also locate the serial plate and give me the mod num will be a buch of num like 106.48062890 around the bottom drawer on the body of the range or around the oven door if the eoc or clock isnt lit go turn the breaker off for 5sec and let me know