HVAC diagnostics.
Know what to test next.

An HVAC diagnostic app for technicians. Follow guided checks and record what you find on iPhone or Android.

  • Your first solo service call
  • Unfamiliar commercial unit throwing an error code
  • A tricky problem you haven't seen before
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Try for free. No credit card needed.

See how a call goes →

Furnace not heating

Example

Check Transformer Output

Measure 24VAC at the control board

24VAC stable

NextCheck board power and LED diagnostics

0VAC or unstable

NextTrace low-voltage supply

Guided HVAC troubleshooting, step by step.

Describe the symptoms. ACLogics diagnostic software tells you what to measure and what to expect. Record what you find to guide the next check.

See a real diagnostic call
App check asking what the technician found, with separate next steps for a soiled or clean filter.

An unfamiliar fault. Checks you know.

ACLogics breaks the problem into familiar checks, explains what to measure, and helps you understand what each result means.

Explore guided diagnosis
App diagnosis summary showing causes ruled out with reasons and an issue that needs attention.
See what each check rules out and what still needs attention.

Works with 10 HVAC brands, including Carrier, Trane, Lennox, Daikin, Goodman, and Rheem.

Start from the nameplate. Skip the typing.

Scan the label to fill in equipment details. Attach the nameplate to your diagnosis.

See the nameplate scanner
Nameplate review showing the brand, model, masked serial number, and a manufacture date marked estimated.
Review the captured fields. Estimated dates come from the serial number.

“Why does it need that part?”

Use the diagnosis report to review the findings. Set parts and labor prices, check the scope of work, and share an estimate with the customer.

See the report and estimate
Example customer estimate with itemized parts, labor, warranty terms and an approval signature line.
Example estimate. Review prices and terms before sharing.

Keep saved jobs open offline.

Open a job online first. Then read its steps, record checks, and add notes without a signal. New AI diagnoses, Side Chat, and AI reports need internet.

See what works offline

Start free. Choose a plan as you need it.

Free Plan
Free
Run a few real diagnostics
Pro Plan
$14.99 /month
For the solo tech.
Team Plan
From $99.99 /month
For HVAC teams. Unlimited usage for all members.
See team plans
Compare all plans

Take it on your next service call.

Try for free. No credit card needed.

Running a team? See ACLogics for teams
App Store Google Play
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