Senior HVAC technician struggles to diagnose a rare electrical phenomenon where a fan motor reverses direction when the compressor starts, with no board and a correct wiring configuration.

No diagnostic tool exists that can model or simulate how starting a compressor affects fan motor polarity/phase in real-time wiring scenarios, forcing technicians to rely on trial-and-error and forum posts.

Severity

4High

Willingness to Pay

implied

Added

Jun 14, 2026

Workarounds Described

Testing capacitor manually with multimeter
Checking compressor heat by touch
Trial and error with wiring changes
Posting on Reddit for diagnostic help

Implied Software Gaps

Simulation tool that models motor polarity changes under load
Knowledge base with indexed technician forum solutions

App Concept

FaultFlow Simulator

An AI-powered diagnostic app that takes wiring configurations, component specs, and real-time measurements to predict rare circuit interactions like fan reversal. Enter the symptoms, get a ranked list of likely causes with step-by-step verification tests. Replaces slow forum searches and guesswork.

Key Features

Input wiring diagram and component values (capacitor, compressor, fan specs)
Real-time circuit simulation to predict polarity/phase anomalies
Symptom-to-cause troubleshooting tree with verification steps
Community verified solutions with technician ratings

Target Users: HVAC field technicians and service managers at residential and light commercial service companies (1-50 techs)

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

Existing Solutions Mentioned

capacitor testingmultimeter

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