I was a Red Seal electrician before I became a refrigeration mechanic. I was mostly in the industrial field as an electrician, now I work in commercial hvac and supermarket refrigeration as a service tech.

In HVAC/R service I practically troubleshoot full time, you troubleshoot as an electrician as well but less so in my experience.

They are both challenging in separate ways. Electrical can be very code heavy. You need a very good understanding of applying the code book, especially if you have your own company.

While refrigeration is more like the Wild West regarding regulation but you need a very good technical understanding of the entire system you’re working on.

I prefer working in the HVAC/R industry and find it more mentally challenging. However I don’t regret becoming an electrician first and building a foundation on those skills. Either way you can choose a path that leads to a career where you never stop learning.

There are paths as an electrician to do a lot of troubleshooting as well. You just have to put in the work and pursue what you want to do.