My oven have not been used for a long time. Lately I need to toast some meat with it but I found it didn’t work. Whole house power tripped once I powered on the oven for only several seconds. So my father disassembled it and measured the circuits of it by multimeter but everything is fine. This problem troubled me for a long time, but I found the issue before I prepared to trade in it for a new oven.

The issue is a common issue of other users after I googled via internet. The root cause is moisture, yes, moisture! So how can I solve it? This picture told me everything.

I just followed the steps adjusting the temperature from 50 ℃ to 240 ℃ step by step gradually for around 2 more hours. Then the issue is solved! Thank Google! Fantastic.