How to Troubleshoot a Sharp R930AW-P Microwave-Convection Oven Not Heating or Rotating?
Asked Dec 5, 20140 views1 answer
I am experiencing an issue with my Sharp R930AW-P microwave-convection oven, serial number 01725. The turntable does not rotate, and both the microwave and convection heating have stopped working. Although the display panel lights up and one or more of the ventilation fans operate, the oven is not functioning properly. I removed the turntable motor and tested it with an ohm meter across the two terminals (while disconnected) and received a reading of 1 to 2 ohms. What could be causing these problems?
Troubleshooting Your Sharp R930AW-P Microwave-Convection Oven
Experiencing issues with your Sharp R930AW-P microwave-convection oven can be frustrating. However, by systematically troubleshooting the problem, you can identify the cause and determine the best course of action.
Common Symptoms and Potential Causes
You mentioned that the turntable does not rotate, and both the microwave and convection heating have stopped working, even though the display panel lights up and the ventilation fans operate. Here are some common causes for these symptoms:
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Faulty Door Latch Switch
- The door latch switch ensures that the microwave operates only when the door is securely closed. If this switch fails, it may prevent the microwave from functioning properly.
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Blown Thermal Fuse
- A blown thermal fuse is a common issue that can cut off power to the microwave. This safety feature protects the appliance from overheating.
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Turntable Motor Issues
- If the turntable motor is malfunctioning, it may not rotate, affecting cooking efficiency.
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Circuit Board or High Voltage Component Failure
- If the microwave operates but does not heat, there may be issues with the circuit board or high voltage components like the magnetron.
Step-by-Step Troubleshooting Guide
Expert Answers
B
Bill
Answered Dec 5, 2014
If you're dealing with a problem in your Sharp `R930AW-P` microwave-convection oven, a common issue could be the door latch. These latches are relatively inexpensive, often under $10, and it's worth checking with your local parts supplier to see if you can return it if it doesn't solve the problem.
Regarding the door latch switch, it sounds like you're on the right track with your testing. When the door is closed and properly latched, the top and bottom sets of contacts should show continuity, while the middle set should not. If you're not seeing that continuity, it likely indicates that the door latch switch has failed and needs to be replaced.
As for the turntable motor, the resistance you're measuring—1 to 2 ohms—doesn't definitively indicate whether the motor is good or bad. Motors typically have some resistance across their terminals when disconnected, so you would need to apply power to the motor to properly test its functionality.
If replacing the door latch doesn't resolve the issue, it might be a combination of problems, and you may want to consider having a technician take a look. They can safely diagnose any high-voltage components, which can be hazardous to handle on your own.
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