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Plumbing, Electrical, or other field serviceDiagnostics & Troubleshooting4HighHomeowner$ implied

A Navien tankless water heater has sporadic leaks and inconsistent hot water, and the homeowner cannot get the service company to respond after a cleaning that worsened the problem.

The service company did not resolve the issue and is unresponsive; the homeowner lacks the tools and knowledge to diagnose the flow sensor or other root causes.

Severity

4High

Willingness to Pay

implied

Added

Jun 26, 2026

Workarounds Described

watched YouTube videos to try to diagnose
asked fiancé to remove cold inlet filter which led to argument

Implied Software Gaps

An interactive diagnostic tool that walks homeowners through common tankless heater problems without needing to dismantle parts blindly
A service booking platform that holds companies accountable and provides verified reviews

App Concept

TanklessDoc Pro

A diagnostic app for tankless water heaters that guides homeowners through step-by-step troubleshooting with visual aids, logs symptoms, and connects them to verified technicians who provide remote or in-person service with accountability.

Key Features

Step-by-step diagnostic wizard with videos and diagrams
Flow sensor test simulator using phone microphone or flow data
Service history log with photo evidence
Direct booking with rated, insured plumbers specializing in tankless heaters

Target Users: Homeowners with tankless water heaters (especially Navien, Rinnai) in single-family homes, who need affordable self-diagnostics or reliable service

Revenue Model: Freemium with $9.99 per diagnostic report; $29/mo pro tier for unlimited diagnostics and priority booking

Existing Solutions Mentioned

Navien NPE-150Sprofessional cleaning service

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