When the tenant calls for a maintenance request, it's always best practice to have a list of trouble-shooting steps.

Without knowing the apartment and its wiring hard to trouble shoot.

In the future I may try to fully hire out, troubleshooting a snow blower or mower that won't start may be my least favorite part of being a landlord lol. 

Do you have any troubleshooting or tuning tips to diagnose and address why some of the registers are having weak to no air flow?

Anything I can do to troubleshoot before calling an electrician?

He went back the following day and he said the sewer line/drain had clogged again and he was going to get a cctv camera to troubleshoot and see where the problem was.

If you're hiring a cold caller directly then you can get them for cheaper, but you have to deal with training them, managing them, and troubleshooting issues with your dialer when those issues come up.

I feel the city would offer support with incentives and tax breaks since the mayor just visited us the other day to try to troubleshoot this lack of housing as well. 

I'm imagining that I could troubleshoot the issue but it would take me the time to drive 30 minutes out there.

He was a licensed journeyman not master and was at the house about 2 hours and at first said it was her fridge causing the issue then later said it wasn't and  needed to go back and "troubleshoot" some more.