What boiler service tools do you carry with you?

I'll add:

Personal CO detector.

Headband flash light.

Alligator clip jumper wire with 24 volt reset breaker.

Transfer pump & double end hoses.

N95 masks.

Assorted pails.

Coverall jump suit.

Allen keys, standard and metric

Nutdriver, must include 1/4" and 5/16" larger can be helpful too.

Pocket screwdriver.

Small and medium adjustable wrenches.

I could go on, but I think you may be focused on diagnostic tools and not really hand tools.

I do av but i really like the klein 11 in one screwdriver.
it has #1 and #2 phillips, 2 sizes straight blade, 2 torx sizes, 2 robertson sizes, and the barrel and adapters are a number of sizes of nutdriver.
you can take the barrel out and spin it between your fingers for long fasteners that tun relatively freely
you can use an adjustable wrench and the inserts with the bit in them to use it like a right angle screwdriver

obviously you will still need a long #2 phillips and a long straight blade to reach especially some fasteners in recesses.

i think after decades of working on cars i've learned a lot of creative ways to reach fasteners in weird places

trouble light type light that takes the same batteries as my codless tools.

I also have reached an age where i need a milk crate or bucket to sit on down low.

Don't forget the BOOTIES!

open eyes and a open mind for starters

6 n 1 screw drive

1/4 deep socket set

fluke multi meter

assorted hand tools

Flash light

finally a pair of eye glasses

a working knowledge of the sequence of operations for the equipment you are servicing and knowing the safety devices which may be at fault

A good grip on the workings of controls ,opposite potentials,time delays ,flow switches ,magnetic starters voltage and over current, phase monitoring controls and how not to let the smoke out of a new control .

Being truthful and not broad brushing existing issues which may not be ideal but are not the root cause of the existing issue .

Only work on equipment which you are qualified and comfortable working on and being smart enough to known when your in over your head.

Knowing how a system should properly operate and when it is time for regular maintenance or that said maintenance has been deferred which is the underlying issue

And also have a possibly older smarter tech which when having a rough time you can call on for some intelligence discussion with about your issue .

Never be afraid to admit that your at a lose .

Honestest is always the best policy

peace and good luck clammy

Yours looks like mine. It's getting heavy. I need to find another way.

what is "opposite potentials"?

i like the one i posted because the shaft pulls out and i can use it like the second one you posted for a lot of things.

i haven't found a version of a precision screwdriver i like better than the one i got free at a trade show about a decade ago. the barrel is a single aluminum piece so it is thick enough it won't stab through your pocket and the barrel has a cap on the end that stores the bits. i bought an assortment of whia bits for it.

something like this. i don't know if there is a brand name version:

@clammy has an interesting tool proposal. "Opposite Potential", which is to say that "similar potential" or "opposite impossibility" might be tools that his counterpart might bring to the table. That is not to say that "Similar Impossibility" might not also be considered another tool. This is all based on the theory that "opposites attract", which in turn causes "similars to repel". Although since I have been stuck in this wheelchair, I have not had the opportunity to Repel down the side of a mountain, or climb a mountain for that matter,   ...but that is a story for another day, today we need to purchase a steamer trunk to use as a tool pouch in order to carry all these new tools to @RayWohlfarth’s next boiler service call. along with @ethicalpaul 's video equipment in order to document how each and every tool was used in order to figure out that someone just left the switch turned off.  

rollout switches and , spill switches, and thermocouples and cad eyes

@RayWohlfarth, Thanks for starting this thread! It makes you think on an organization level, rather than just reactionary thinking. I am not an hvac tech, but I do some basic annual maintenance on my rental properties and I like to have dedicated tool cases for various types of work, so this is right up my alley!!!

I have taken all the suggestions here, divided them by categories that make sense (to me at least) and here is the "master list" for what it's worth!

Safety Gear

• Eye protection /Safety prescription glasses if applicable
• Dust mask (N95 minimum) / Respirator
• Personal / Portable CO detector
• Gas leak detector
• Coverall jump suit
• Camera (phone is more than adequate) (to document original condition for liability protection)

Testing Tools

• Combustion analyzer
• Purge timer for Honeywell 7800 flame safeguard
• Honeywell 7800 digital read out
• Digital multimeter
• Alligator clip jumper wire with 24 volt reset breaker
• Several alligator clip jumpers
• Ampmeter
• IR temperature gun
• Flir camera for diagnosing radiant heat projects
• Differential temperature

Standard Tools (and supplies)

• Small cordless screw driver to adjust the pressure temperature control
• Wireless voltage detector
• Screwdriver set including star bits / Klein 11 in one screwdriver
• Ruler (for measuring electrode setting)
• Tape measure to size flue or pipe diameter
• Inspection mirror or camera
• Flash light / Headband flash light
• Big Flood/Trouble light (uses same battery as cordless tools)
• Allen keys, standard and metric
• Nutdriver, must include 1/4" and 5/16" larger can be helpful too
• Pocket screwdriver
• Small and medium adjustable wrenches
• Wire cutter and stripper
• Small wire brush
• Small Vise-grip (for where all else fails)
• Circular wire brush in the case (If we carry our drill/driver)

Boiler Specific Tools

• Gauge glass cutter
• Gauge glass brush
• Gauge glass fittings
• Pressure gauge manometer
• Pipe size caliper

Supplies and Miscellaneous (separate carry boxes/toolcases)

• Transfer pump & double end hoses
• Assorted pails
• terminals/wire nuts
• Zip ties
• Electrical tape
• Teflon pipe dope
• Kneeling pad
• Bucket with seat, sit down and observe
• rollout switches and , spill switches, and thermocouples and cad eyes
• spare pigtail(s) brass fittings, glass gauge nuts, washers and gaskets etc.

I take my well equipped truck, and my most important tool, a well educated, experienced brain with a well practiced set of skills. What I carry in is a matter of my usual pouch of tools mainly to access and diagnose based on prior information given. Another most important tool is my pen and pencil and service order. Can't get authorized, record data or get paid without it. Needs no batteries and works with and without light. Works everywhere. And my young apprentice who needs to look smart and stay fit, carries all the tools he may never use.

I have been known to diagnose correctly what others miss without anything. But then clients that don't know me begin to doubt my ability.😉