Car's cooling fans fail to turn on when refrigerant is low, causing engine overheating.

No single tool that integrates refrigerant pressure monitoring with fan control diagnostics; current process relies on manual jumping and external gauges.

Opp. Score

Severity

4High

Willingness to Pay

implied

Added

Jun 10, 2026

Workarounds Described

jumped the fans
tested the relays
put freon in system to see if fans kick on

Implied Software Gaps

Diagnostic tool that automates fan relay and pressure checks without manual jumping

App Concept

CoolSage Diagnostic

A smart OBD-II dongle that monitors refrigerant pressure and fan relay signals, providing real-time alerts and diagnostic codes for cooling system failures. Automatically identifies whether the issue is low refrigerant, a bad relay, or a faulty sensor, saving hours of manual troubleshooting.

Key Features

Real-time refrigerant pressure monitoring
Automated fan relay testing
Push notifications for overheating risk
Diagnostic report with recommended fixes

Target Users: DIY car owners and independent auto repair shops working on vehicles with electric cooling fans.

Revenue Model: $59.99 one-time hardware purchase + $4.99/mo subscription for advanced diagnostics and cloud storage

Existing Solutions Mentioned

jumping fanstesting relaysputting freon in system

Part of App Idea

Car's cooling fans fail to turn on when refrigerant is low, causing engine overheating.

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