So every year I would have a technician come out and service our furnace. I'm not sure what all it entails to service our furnace, aside from changing the filter, but last year I learned quite a bit about our furnace when I replaced the circuit board, inducer blower, and then the pressure switches. (full post here: Furnace keeps going into lockout)

Seems like after all that, servicing my furnace myself shouldn't be too bad. I took a look at some lists posted on different sites that detail everything that's done, such as this one: https://columbiahvac.net/tune-up

• Blower – inspect assembly (?)
• Clean or change filter (?)
• Verify limit operations (?)
• Measure and record delta T (?)
• Clean flame sensor
• Clean and cycle condensate pump (90% or better EF) (?)
• Measure and record amp draw to blower (?)
• Measure and record amp draw inducer (?)
• Inspect flue pipe
• Measure and verify ignition protocols (?)
• Clean burners (?)
• Tighten electrical connections
• Clean and adjust pilot assembly (?)
• Clean exterior
• Measure and adjust gas pressure (?)
• Brush and inspect heat exchanger (?)
• Conduct bubble test for gas leaks
• Vacuum burner compartment

Most of these things I've done, the ones with a (?) are the tasks I'm unfamiliar with. Some of the things I wonder about doing myself, like measuring output and all that, but it seems like a lot of it would be pretty simple.

Can anyone give guidance here? Or recommend any good online resources in particular that would be good to follow when self servicing a furnace?

Thanks!