[Malfunction Phenomenon] Sometimes heating works normally, sometimes it doesn't, and the occurrence of the malfunction is irregular.
[MALFUNCTION REASON] Adjust the position of the oven door switch.
[Analysis and Maintenance] This kind of malfunction belongs to typical poor contact. Possible causes of the fault may include:
(1) Poor contact of the connecting plug for microwave system components.
(2) Poor contact of the connecting plug for the oven door switch.
(3) Misalignment of the oven door switch position.
After opening the microwave oven and checking, there were no issues found with the high-voltage transformer or other microwave system components, nor with the oven door plug. The interlock switch on the oven door was also functioning properly. After adjusting the position of the oven door switch to coordinate its operation with the oven hook, the fault ceased to occur.
Data from: Beijing Samsung Microwave Oven Repair Phone Number http://blog.sina.com.cn/sxweibolu.
Samsung microwave oven, sometimes heats normally, sometimes cannot heat.