The Top wall-oven (Viking VEDO205-ss)does not temperature cycle (intermedant problem)..when malfunctioning, the oven will reach temp then slowly cool to around the 200 degree range, wich I assume is the heat sink. The lower oven works OK. Any thoughts on where I should start looking...I have replace the coil and both thermostats.

Ovens - Viking - 27" Professional Select Built-in Electric Double Wall Oven -...