# Know what to check first, and why.

Canonical: https://www.aiventic.ai/solutions/diagnostic-guidance

> Aiventic ranks the likely causes for the symptom in front of the tech, shows the past repairs and bulletins behind each one, and suggests the next check.

On the job · Diagnostic Guidance

Aiventic ranks the likely causes for this model and symptom from your own closed jobs and the OEM documentation, and shows the evidence behind every one.

[Book a demo ](https://www.aiventic.ai/schedule-a-demo)How it works

## Why it’s still hard. Your history has the answer. Nobody can reach it in time.

1. 01  
### Throwing parts at it  
Without a clear diagnostic path, the tech swaps the most likely part and hopes. Sometimes it works. Sometimes it’s a callback.
2. 02  
### Experience lives in a few heads  
Your senior tech knows that this model’s control board is rarely the problem. The new hire doesn’t.
3. 03  
### Manuals don’t rank anything  
The service manual lists every possible cause. It doesn’t say which one your shop finds nine times out of ten.

## How it works. Three steps, on every job.

1. Step 01  
### Start from the symptom  
The model, the complaint, error codes, and what’s been tried, from the ticket, the pre-triage, or the tech’s own words.
2. Step 02  
### Rank the causes  
Aiventic weighs similar repairs, failure patterns on this model, and OEM bulletins, and puts the most likely cause first.
3. Step 03  
### Guide the next check  
For each cause: what to test, what reading to expect, and which part fixed it when it was the problem.

## What it draws on. The platform layers behind this workflow.

Every answer comes from your own closed jobs first, then your manuals, bulletins, and parts data. The lit layers are the ones Diagnostic Guidance uses.

1. [L4 Service Action What should happen next? Stage the part, route the right tech, and write it back to the FSM](https://www.aiventic.ai/platform/service-action)
2. [L3 Service Reasoning What does this situation likely mean? Likely causes, parts, and diagnostic paths, with the evidence behind them](https://www.aiventic.ai/platform/service-reasoning)
3. [L2 Service Knowledge What does the documentation say? Manuals, bulletins, SOPs, and parts catalogs, matched to the job](https://www.aiventic.ai/platform/service-knowledge)
4. [L1 Service Memory What happened? Every job, unit, part, and outcome you’ve recorded, ready to reuse](https://www.aiventic.ai/platform/service-memory)

## Who it helps. Everyone on the job works from the same experience.

* Technicians  
Check the likely cause first, with the evidence in front of you, instead of working down the manual.
* New hires  
Follow the diagnostic path your best techs would take, and learn why it works.
* Service managers  
See fewer parts swapped on a hunch and fewer jobs that come back.

## Questions. Straight answers.

What if the top cause is wrong?

It’s a ranked list, not a single answer. The tech sees the next most likely cause and its evidence. What they find goes back into the history, so the ranking gets better.

Does it override the technician?

No. The technician stays the decision-maker. Aiventic shows what your company has seen before and why, and the tech decides what to do.

What equipment does it cover?

Whatever you repair. It reasons over your own history and documentation, so it covers the HVAC units, ovens, refrigeration, and appliances your team already services.

## Keep going. Related workflows.

* [Before dispatch Similar Repair Intelligence See every time you’ve fixed this model and symptom, and what held Learn more ](https://www.aiventic.ai/solutions/similar-repair-intelligence)
* [On the job Technician Assistance Hands-free voice help on the job, drawn from your own repair history Learn more ](https://www.aiventic.ai/solutions/technician-assistance)
* [By outcome Reduce Callbacks Stop paying twice for the same repair by fixing it right the first time Learn more ](https://www.aiventic.ai/solutions/reduce-callbacks)

## Stop solving the same repair for the first time.

Bring a few hundred closed jobs. We’ll show you what your company already knows.

[Book a demo ](https://www.aiventic.ai/schedule-a-demo)

---

*Markdown representation of [https://www.aiventic.ai](https://www.aiventic.ai). Append `.md` to any page URL, or send `Accept: text/markdown`, for its markdown. Full site index: [/llms.txt](https://www.aiventic.ai/llms.txt) · [/sitemap.xml](https://www.aiventic.ai/sitemap.xml)*