Assuming that you’re not a technician, I’ll keep this simple.
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One of two causes:
There’s a faulty connection in getting proper voltage to the controller, or
The controller is failing
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Despite there being only two possibilities, pinning down the EXACT problem may not be that simple – particularly if the problem is #1.
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You need to get a service company to look at it. Here’s some links to identify who is best to call:
Frymaster – Domestic ServiceÂ
Frymaster and Dean International Factory Authorized Service CentersÂ