Fan motor is slowing down and not keeping the desired temperature
The circuit diagram for the standard control model shows the blower has a two-speed motor, connected directly to the power line in "Cool" mode, or connected to the temperature control in "Cook" mode. When the blower slows down during cooking, switch it temporarily to "Cool" mode. If it goes to normal speed, the problem is with the mode switch contacts or the wiring terminals between the fan mode switch and the temperature control board, or the control board itself.
If the speed does not change, check the wiring terminals at the speed switch common terminal (I assume your problem occurs in both low and high speeds). If you find tarnished, loose, or burned terminals, clean, repair or replace as needed. (In extreme cases, a loose terminal will cause the wire to overheat, damaging the insulation, oxidizing the terminal and causing a high-resistance condition that will reduce the voltage available to the motor.) If the connections are all good, the motor bearings are probably getting sticky at high temperatures. Let the oven get hot enough for the blower to slow down, then shut it off and check the blower bearings while wearing oven mitts.
May 12, 2014 |
Southbend SLGS-22SC Gas Double Oven