Oven takes 30 minutes to heat up to 350 degrees

no
indicates at least one element not working

It is normal for the thermal device to turn on and off. Obtaining a steady temp is not always possible. When setting a temperature on some ovens, they have what is called a tolerance point. That means a set temperature has a range of a few degrees up or down. At the Down point, the oven is triggered to energize the coils and bring the interior of the oven back to the settings desired. The other factor is opening the oven and allowing cool air to enter, or in some cases a leaking door seal allows air to enter and heat to escape.

One must preheat the oven to the desired baking temperature. If the oven is turned on and the food immediately put in to bake, it will take longer to bake the first batch than the second and subsequent batches, because the oven need a few minutes to heat up.

In other words, the oven isn't at 350 degrees the instant you turn it on. It takes about 15 minutes for the oven to reach 350 degrees. I hope this helps.

if it is an electronic timer temp controller you might want to check it

have you checked with an oven type thermometer for 350 degrees against the setting of 350 degrees,if its off very far then its the oven temp sensor in the upper left middle or right rear wall of the oven thats bad it looks like a small pencil type rod 2" to*' long it merely unplugs off the oven s control panel in the rear,you can test its resistance also to get an idea if it is your culprit,otherwise the oven element could have a hot spot in it and not letting all the current thru to properly heat the element,it will be dis-colored in that area

Hi,
If your electric oven is not heating then you probably have a bad heating lelement in your oven. This is not that hard to fix yourself...
Check out this tip that I wrote about the Oven not heating problem..

Oven Problems Electric Oven is Heating Slowly or Poorly
http://www.fixya.com/support/r4511800-oven_problems_electric_oven_heating

heatman101

if it has an electric oven ignitor, this may be bad not getting hot enough to ignite the gas in oven.

sound like you may have a burnt fuse causing to run on half voltage check your fuses thanks from gilles

try unplugging the range for at least 30 minutes

Check the BACK of your temperature knob for an adjustment. I was ready to replace my heating elements when I accidently discovered the adjustment. Made the adjustment and no more problems. My oven now stays within 4 degrees of settings.