If your cooker is taking ages to cook everything, then it is an indication that your oven is not reaching the desired temperature. There are number of faults that could cause this problem, but generally this due to heat escaping the oven due to faulty door seal.
In addition you might find that your are getting burning or scorching at either side of the oven on the units – this is also indication that you have a door seal problem.
Check your door seal to see if they are worn or perished causing the door not to seal correctly. This will cause heat to escape and it can result in damage on your units and extended cooking time.
We welcome you to Email or call on +44 (0) 1273 420134 if you need help in finding the correct item for your appliance. In order for us to help your inquiry we ask that you have the model and Serial Number of the appliance to hand when calling.
We have a wealth of expertise on cookers Gas and Electric so do please contact us for advice. We are very experienced at helping all levels of competence and endeavour to understand your needs and to use language you can understand.