KitchenAid 27" Combination Wall Oven with Even-Heat™ True Convection (lower oven) Use & Care Manual

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Try the solutions suggested here first in order to avoid the cost of an unnecessary service call.
TROUBLESHOOTING
Nothing will operate
  
Has a household fuse blown, or has the circuit breaker 
tripped?  
Replace the fuse or reset the circuit breaker. If the problem 
continues, call an electrician.
    Is the appliance wired properly?  
See Installation Instructions.
Microwave oven will not operate
  
Is the door completely closed?  
Firmly close door.
  
Is the electronic oven control set correctly?  
See “Electronic Oven Control” section.
  
On some models, is the Control Lock set?  
See “Control Lock” section.
  
On combination oven models, is the lower oven self-
cleaning? The upper oven will not work during the lower 
oven Self-Cleaning Cycle.
   Is the magnetron working properly? 
Try to heat 1 cup (250 mL) of cold water for 2 minutes 
at 100% cooking power. If water does not heat, call for 
service. See “Assistance or Service” section.
Microwave oven makes humming noise
   This is normal and occurs when the transformer in the 
magnetron cycles on.
Microwave oven door looks wavy
  This is normal and will not affect performance.
Turntable will not operate
   Is the turntable properly in place? 
Make sure turntable is correct side up and is sitting 
securely on the turntable support.
 
 Is the turntable support operating properly? 
Remove turntable. Remove and clean turntable support 
and rollers. Replace turntable support. Replace turntable. 
Place 1 cup (250 mL) of water on the turntable, then 
restart oven. If it still is not working, call for service. See 
“Assistance or Service” section. Do not operate the oven 
without turntable and turntable support working properly.
Turntable rotates both directions
   This is normal and depends on motor rotation at beginning 
of cycle.
Display shows messages
  
Is the display showing a letter followed by a number? 
Clear the display. See “Display(s)” section. If it reappears, 
call for service. See “Assistance or Service” section.
Display shows time countdown, but is not operating
  
Is the Timer in use?  
See “Timer” section.
Tones are not sounding
  
Are tones disabled?  
See “Tones” section.
Fan stays on after cooking is completed
   Depending on the temperature inside the microwave oven 
after a cooking cycle ends, the cooling fan may continue 
to run for some time in order to cool the microwave oven. 
The turntable may also continue to rotate and the light may 
stay on during this time. This is normal. The door may be 
opened at any time to add or remove food, and/or to start 
another cooking cycle.
Smoke is coming from oven vent during crisping
   Some smoke is normal and occurs just as in conventional 
crisping.
Sparking during crisping
   This is normal and occurs as fat burns off from past 
cooking. Sparking will stop once fat is completely  
burned off.
Cooking times seem too long
   I
s the cooking power set properly?  
See “Microwave Cooking Power” in the “Microwave Oven 
Use” section.
  
Are large amounts of food being heated?  
Larger amounts of food need longer cooking times.
  
Is the incoming voltage less than that specified in the 
“Electrical Requirements” section?  
Have a qualified electrician check the electrical system  
of the house.
Radio or TV Interference
  
Is the microwave oven plugged into the same outlet?  
Try a different outlet.
 
 Is the radio or TV receiver near the microwave oven?  
Move the receiver away from the microwave oven, or adjust 
the radio or TV antenna.
  
Are the microwave oven door and sealing surfaces 
clean? Make sure these areas are clean.