Pre-Heated my oven, it beeped and I put muffins in. They began to cook and suddenly oven lost heat. When I try to pre-heat now, it clicks as if it is pre-heating but I am getting no heat. I have checked fuses and replaced the temp sensor but still no heat. Anyone have any suggestions as to what the problem maybe. Thanks

Check the thermostat.

Not sure how your oven works, but older ones had a "pre-heat" setting that you would use to get the oven to temp. This ran both the upper (broiler/grill) and lower elements at the same time to raise the heat quickly to temp. Once the oven is pre-heated, you would switch the selector to "bake" and that would only allow the lower element to work after that. If you failed to remove it from "pre-heat", it would use both and burn the food. Just saying.

I would try to cancel it out.. and restart it..if it wont clear, slide the stove out and unplug it or trip the breaker in the fuse box..retry..

is this 400c or 400f

Typically an oven beeps when the interior temperature macthes the temperature where you set the dial. This is an audible signal to that fact and particularly helpful when you need to pre-heat the oven. For example it you want to cook something at 350 degrees, you set the dial at 350. When your oven reaches that temperature it beeps to let you know. Some cooking directions tell you to preheat your oven. In that case, when you set the dial to 350 and wait for the beep...you know you are safe to start your cooking process because the oven is now pre-heated to the temperature you set. If your recipe requires a pre-heated oven, and you don't wait for the beep, your taking a guess at what temperature you're cooking your food. Additionally, if you want to know what the internal temperature of oven is and your oven is heated...you simply turn you dial setting and listen for the beep. Again, if you set your oven at 350 and you want to know how hot your oven is... slowly turn the dial setting. If the oven beeps at 275 then that's how hot your oven has gotten. To let it finish heating to 350 just reset the dial and wait for the beep.

To preheat oven just select the temp you intend to cook at and wait until the red light goes out,it is then preheated
Then you can put your food in and carrying on cooking.
Yes you do put it on fan symbol, but make sure it is on the right one , as some ovens have fan only as well as fan and heat.
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thanks.

A good pre-heated pizza stone will help cook the crust better when the pizza is placed right on the stone. As for the cheese burning, check the actual temp. of the oven with a good thermometer.

F2 is a Oven temperature exceeded the clean runaway temperature (self clean only) or the cooking runaway temperature (cooking modes only)