hello i have just purchased a clock timer from you _ fitted it and it works fine but the left oven refuses to light there is a spark there but there dont seem to be any gas the oven bulb dosent come on either when the knob is turned on(bulb is ok) cooker is a cannon rangemaster main oven is ok as is the top burners and grill the model no. is 10755G this (left)oven has only been used about 5 times since new as we nearly always use the right one(the clock timer is set to (manual)could you offer any advice please. Thankyou so much.