Diagnosing a persistent low supply air temperature / evaporator freezing alarm on a new RTU with suspected restriction but unable to locate TXV.

Existing HVAC diagnostic tools do not guide technicians to locate hidden components like TXVs or provide systematic troubleshooting for intermittent alarms.

Severity

4High

Willingness to Pay

implied

Added

Jun 16, 2026

Workarounds Described

reading wrong spot on liquid line to check subcooling

Implied Software Gaps

Augmented reality component locator to quickly find TXVs and sensors in unfamiliar equipment

App Concept

HVAC DiagPro

Mobile app that combines refrigerant circuit simulation, component locator (AR overlay), and step-by-step diagnostic workflows. It helps technicians quickly pinpoint restrictions or sensor issues in complex RTU systems, reducing callbacks.

Key Features

Component locator with augmented reality to find TXVs and sensors
Refrigerant circuit simulation and diagnostic tree based on pressures and temperatures
Alarm code library with common root causes and fixes
Log and share diagnostic data with team or manufacturer support

Target Users: HVAC technicians and service companies servicing commercial RTUs and split systems, especially newer models with hidden components.

Revenue Model: $19.99/mo per technician subscription or $199/yr per company

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