Faultbench helps HVAC techs find the right part of the manual and work through a fault step by step. It runs on your laptop, and it keeps working when there’s no signal.
Go on, click something. This one’s live. Pick a problem, hit Check, then click a [1] and the real manual opens on the page that answer came from.
Say what's wrong
Say it in your own words. The more you tell it, the better.
Common problems (click to use)
And you need one fault code table out of it.
Which one has the procedure in it? Good luck.
So pulling it off the manufacturer’s site isn’t happening.
Every manufacturer buries it somewhere different, and nobody remembers the model-specific stuff. Faultbench keeps your manuals and the search on the laptop that’s already in your van.
Use the service manuals you already have. IOMs, wiring docs, bulletins, whatever you have saved. Add one once and it stays on that machine.
Same words you’d use standing at the unit. Compressor won’t start. Keeps short cycling. What does E7 mean?
You get the manual name and the page. Click it and the page opens with the passage lit up. Check it yourself, then go fix the unit.
I mean that. Every answer comes out of the manuals you added, and it shows you the page it came from. You decide what to do.
With the thermostat calling for cooling, check for 24 VAC across the contactor coil. If it is present and the contactor does not pull in, replace the contactor.
The demo up there does this for real. Click a citation, the actual PDF opens on the cited page, passage highlighted.
Faultbench helps you figure out what to check next. You tell it what you see. You enter your readings. It narrows things down and points you back to the manual. You still make the call.
A short list, in the order that rules things out fastest.
Tell it what you measured and what you found. The list gets shorter.
Every step points at the page it came from, so you can check it before you touch anything.
Step-by-step troubleshooting is partly built. Today you get the ranked list of what to check with the pages attached. Entering readings and narrowing down from them is next.
Everything sits on the laptop. Your manuals stay available and bad Wi-Fi doesn’t stop the job.
Fan runs, breaker is on, thermostat is calling. Here’s the kind of thing Faultbench walks you through.
Each answer narrows down what to check next, and each step comes with the manual page behind it. Same goes for a fault code, a frozen coil, high head pressure on a hot day, or a unit that short cycles after twenty minutes.
Every job you work through gets saved on the machine. Open it back up and the manual pages come with it.
Recording readings and what finally fixed it is still being built. Today it saves the problem, the steps and the pages.
Use your own manuals. Try the weird equipment. Ask the annoying questions. If Faultbench gets something wrong or wastes your time, I want to hear about it. Windows and macOS, free, no card.
Windows and macOS. No card, no account.
One email, when it’s ready. That’s it.
Straight about where it is. Adding manuals, saying what’s wrong, and getting an answer with the page attached all work offline today. One-click citations, a library you can organise, readings you enter, and installers you don’t have to set up are still coming. That’s why there’s a list here and not a download button.
FAULTBENCH