When you set the oven going does the fan inside the oven run?
Does the little red light on the control panel come on when you turn the oven on?
yES THE LIGHT COMES ON AND FAN COMES ON
Ok if the fan is running and that light is coming on then the fault will be the heater element in there.
To be honest its probberly a coincidence this has gone after spraying the cleaner in there as the cleaner doesn't really cause the heater to fail unless it was ready for going as they can start to split and the cleaner may have caused to go then.
To replace the heater element on this you need to remove the shelves inside the oven and remove the back panel. Its held on with 4 screws. Make sure the power is turned off.
Now you will see the heater element around the fan. This is held on by a single screw.
Remove this screw and then you can pull the heater out and swap the 2 wires over to the new element and refit that.
Then that should cure the fault and get the oven working again.
Thanks for your advise , I had burnt a gap about one inch long in the element with the oven cleaner .
so i went and bought a element for £24.50 and fitted it as you explained
all ok thankyou.