The following chart lists a variety of common problems and nearly all possible
causes. Diagnostic procedures will then be needed to determine which actually
apply. The 'possible causes' are listed in *approximate* order of likelihood.
Problem: Totally dead oven.
Possible causes:
1. No power to outlet (overload or fault in microwave or other appliance).
2. Blown main fuse - likely due to other problems.
3. Open thermal protector or thermal fuse.
4. Defective controller or its power supply.
5. Clock needs to be set before other functions will operate (some models).
Problem: No response to any buttons on touchpad.
Possible causes:
1. Door is not closed (some models).
2. You waited to long (open and close door to wake it up).
3. Controller is confused (pull plug for a minute or two to reset).
4. Defective interlock switches.
5. Faulty controller or its power supply.
6. Touchpad or controller board contaminated by overenthusiastic cleaning.
7. Defective/damaged touchpad.
Problem: Oven runs when door is still open.
Possible causes:
1. Damaged interlock assembly.
2. Cooling fans (only) running due to bad sensor or still warm.
Problem: Oven starts on its own as soon as door is closed.
Possible causes:
1. Defective triac or relay.
2. Controller is confused (pull plug for a minute or two to reset).
3. Defective controller or its power supply.
4. Touchpad or controller board contaminated by overenthusiastic cleaning.
5. Defective/damaged touchpad.
Problem: Oven works but display is blank.
Possible causes:
1. Defective controller or its power supply.
2. Broken display panel.
3. Oven needs to be reset (pull plug for a minute or two to reset).