Stop guessing. Start diagnosing.
FreeFinder builds AI-powered tools for tradespeople in the field. Fast answers, no fluff, built for the job site.
30-day free trial · No credit card required · Cancel anytime
Our tools
Built for people
who work with their hands
No bloat, no learning curve. Open it on your phone, get your answer, close the job.
-
Ranked diagnosticsMost likely causes listed first, with probability levels so you know where to start.
-
Specific field checksExact tests to run for each cause — not vague advice, real actionable steps.
-
Fault code decodingCarrier, Trane, Lennox, Goodman, Rheem, and York — all major brands covered.
-
Safety hazard alertsGas leaks, CO risk, and electrical faults flagged at the top before anything else.
-
Works on your phoneBuilt for the job site. Open it, type your symptom, get your answer, move on.
How it works
Three steps.
That’s it.
Type what the system is doing — or paste a fault code. Plain language, no special format needed.
HVACdx returns the most likely causes in order — with specific field checks for each one and a safety alert if needed.
Less time guessing, fewer truck rolls, more jobs closed per day. The tool pays for itself on the first call it saves.
Your next call
starts here.
Try HVACdx free for 30 days. No credit card, no commitment.
Start Free Trial →Stop guessing.Start diagnosing.
FreeFinder builds AI-powered tools for tradespeople in the field. Fast answers, no fluff, built for the job site.
30-day free trial · No credit card required · Cancel anytime
Our tools
Built for people
who work with their hands
No bloat, no learning curve. Open it on your phone, get your answer, close the job.
- 01Ranked diagnosticsMost likely causes listed first, with probability levels so you know where to start.
- 02Specific field checksExact tests to run for each cause — not vague advice, real actionable steps.
- 03Fault code decodingCarrier, Trane, Lennox, Goodman, Rheem, and York — all major brands covered.
- 04Safety hazard alertsGas leaks, CO risk, and electrical faults flagged at the top before anything else.
- 05Works on your phoneBuilt for the job site. Open it, type your symptom, get your answer, move on.
How it works
Three steps.
That’s it.
Type what the system is doing — or paste a fault code. Plain language, no special format needed.
HVACdx returns the most likely causes in order — with specific field checks for each one and a safety alert if needed.
Less time guessing, fewer truck rolls, more jobs closed per day. The tool pays for itself on the first call it saves.
Your next call
starts here.
Try HVACdx free for 30 days. No credit card, no commitment.
Start Free Trial →© 2026 FreeFinder. All rights reserved.