Why does my Maytag oven show the wrong temperature?

I have a Maytag oven (model # MER5775QAS) that does not display the correct oven temperature. Sometimes it turns itself off when heating up or baking. It is not consistantly off by the same amount. Sometimes the "bake" light flashes well after the oven has been shut off. This is really annoying and I... show more I have a Maytag oven (model # MER5775QAS) that does not display the correct oven temperature. Sometimes it turns itself off when heating up or baking. It is not consistantly off by the same amount. Sometimes the "bake" light flashes well after the oven has been shut off. This is really annoying and I do not have a lot of extra cash to fix this right now. I'm pretty handy, but I've never worked on an oven before. Any ideas?
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