I recently bought a condo (2002 construction) and have no experience with electric systems. So please bear with me if I am using incorrect terms.
A few days ago, the plug point where the water kettle was connected stopped working. On the opposite wall of the kitchen, the microwave also stopped working. Both the kettle and microwave were connected to the lower plug points in the outlet. When this happened, I checked the circuit breaker box and only one half of the tandem breakers (circled in red) was in a kind of off position. (I say "kind of off" because the yellow circled breaker is in a "full off" position, but the red ones are not moving at all.)
When half of the red circled breaker tripped, the lower half of outlets stopped working. I switched the appliances to the upper half. (Stupid thing to do in hindsight). Now the top half of the outlets also tripped and both halves of the red circled breaker are stuck in this position. I am not able to reset them. I have removed all appliances from the two outlets it was powering.
1) Can someone please help me understand what is the problem? Like why did half the tandem breaker trip half way.
2) How do I diagnose the problem and what do I need to do to fix this? (I am handy with fixing electronics, but have never done anything with electric appliances)
3) What is this half tripped position called? I am not sure what to look for.
I would've gotten an electrician to look at, but I cannot have anyone come home till the COVID situation is done... my immuno-compromised mom stays with me.
Thank you for your time!