Hi! We have been having this issue for several months...have replaced the temperature probe and that did not fix the issue...
Turn the oven on regular or convect bake, it will not heat up properly. If you turn on the broiler, (which works fine) and bring it to temperature, then go back to bake, it will not keep the oven at temperature. You can hear the relays clicking but the temperature continues to drop. If I go back to the broiler setting for a minute, then back to bake, sometimes it will kick in and bring the oven back to temperature. Most times NOT.
I am pretty sure it is the control board/ERC/timer (?) but I dont want to spend $300+ based on my uneducated guess and find out it still isn't fixed. HELP!?
Sorry - Need to correct the Model Number - WM30460W.