Technician toolbox
Field safety: This app is an organizational tool, not a substitute for the exact model's manufacturer instructions, applicable codes, or qualified judgment. Verify gas, combustion, venting, electrical, and pressure procedures against authoritative documentation.
Quick search
Search your locally saved information.
AI troubleshooting assistant
Online feature. Your information is sent to the configured AI service for analysis. Do not include customer names, addresses, access codes, or other private information. AI suggestions are not manufacturer-approved procedures unless supported by a cited source.
Describe the service call
One image, up to 5 MB.
Your diagnostic analysis will appear here when the AI service is connected and you are online.
Diagnostics
Diagnostic entries are intentionally blank until verified from manufacturer documentation. Add a confirmed reference or note for the exact model and control version.
Add a verified diagnostic reference
Saved equipment
Add equipment
Technical library
Save document links while online, or use Add file to select PDFs and documents. Files selected here are stored in this browser on this iPhone when supported. Keep a separate backup of important manuals.
Add a manual or reference
Calculators
Temperature conversion
Result appears here.
Ohm's law
Enter voltage and resistance.
Hydronic water volume estimate
Estimate in US gallons.
Uses a cylindrical pipe estimate. Enter actual internal diameter, not nominal pipe size.