This is very strange. I am getting 2 different behavior on my PGLEF387AS4 Frigidaire range.

(1). The switch for the top left burner powers on the both "top left" & "bottom left dual" burners.


(2). Bottom left dual burner always stays high temperature, regardless of the switch setting - it can be this burner's actual switch or the other switch as reported above under (1). After getting to the max temp, burner goes off for few then comes back on as expected.

What could be the reason(s) for these two issues ?

The range was in use for more than 15 years.

Thanks in advance,