A technician cannot wire a new A2L AC system with RDS because the old furnace lacks a Y terminal, causing confusion and blown fuses during installation.

No clear guidance or tool exists for wiring modern A2L systems with RDS to older furnaces that lack standard Y terminals, forcing trial-and-error that damages equipment.

Severity

4High

Willingness to Pay

implied

Added

Jul 2, 2026

Workarounds Described

tried different wiring configurations and blew fuses

Implied Software Gaps

Wiring configuration validation app that prevents miswiring and provides correct step-by-step instructions for non-standard terminal setups

App Concept

WiringWizard HVAC

An interactive wiring diagram app that accepts photos of existing furnace terminals and new equipment specs, then generates a step-by-step wiring plan. It validates connections before power-on to prevent blown fuses and supports A2L/RDS configurations.

Key Features

Photo-based terminal recognition from furnace control board
Selectable equipment (A2L, RDS, standard AC)
Step-by-step wiring instructions with error checking
Fuse protection alerts when a wiring mistake is detected

Target Users: HVAC field technicians doing installation and service calls on residential systems, especially older furnaces

Revenue Model: $9.99 per wiring plan or $19.99/mo subscription for unlimited plans

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