If you have a Farberware electric skillet can you do some tests for me??

I bought one on eBay but it runs 70 degrees Fahrenheit colder than dial
settings, plus, once it reaches set temp and the light goes out, if you
gently press or wiggle up and down on the controller the power / light
goes on again.

What can I reasonable expect?

I wrote the seller back asking for a refund.
--
Michael