HVACDiagnostics & Troubleshooting4HighMaintenance Technician$ implied

Aquastats on fan coil units in a university dorm are failing repeatedly, even after replacements, with no identified cause.

No diagnostic tool to identify root cause of recurring aquastat failures; manual replacement is not solving the problem.

Opp. Score

Severity

4High

Willingness to Pay

implied

Added

Jul 2, 2026

Workarounds Described

drills into aquastats to check for moisture
replaces aquastats manually and repeatedly

Implied Software Gaps

Automated diagnostic system that monitors aquastat health and control signals to identify failure root causes

App Concept

FCU Doctor

A diagnostic and monitoring system for fan coil units that analyzes aquastat failure patterns, sensor readings, and control signals to pinpoint root causes. Connects to existing BMS or standalone to provide alerts and troubleshooting steps, reducing repetitive replacements.

Key Features

Continuous monitoring of aquastat and actuator status
Failure pattern analysis and root cause identification
Integration with common thermostats and BMS systems
Mobile alerts and step-by-step troubleshooting guides

Target Users: HVAC maintenance technicians and facility managers in large buildings like universities, hotels, and offices with multiple fan coil units.

Revenue Model: $199/mo per facility (up to 200 FCUs) SaaS subscription, or $2,999 per-site perpetual license plus $49/mo support.

Existing Solutions Mentioned

replacing aquastats manuallyinspecting for moisture by drilling into aquastats

Part of App Idea

HVAC Detective: Root Cause Finder

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