TrueZONE Wiring Visualizer
Interactive diagnostic tool for troubleshooting condenser issues in TrueZONE zone control systems. Walk through a step-by-step decision tree to isolate why a condenser won't shut off.
For Licensed & Trained HVAC Technicians Only
This checklist is intended exclusively for use by licensed, certified, and trained HVAC professionals. It is not a DIY guide and should not be used by untrained individuals to perform repairs or diagnostics. The purpose of this checklist is to help qualified technicians maintain a consistent, step-by-step workflow so that no critical step is overlooked or skipped during service.
Condenser Diagnostic
Interactive troubleshooting guide for when the condenser won't shut off.
Condenser running, all stats off
All thermostats are satisfied or off, but the outdoor condenser unit continues to run. Follow this diagnostic to isolate the cause.
Field Notes
Check Y wire at equipment terminals
Meter Y to C at the equipment output terminals on the TrueZONE panel or furnace control board.
Disconnect Y at furnace control board
24V is present on Y. Pull the Y wire off the furnace control board terminal to see if the signal is coming from the board or upstream.
Isolate at TrueZONE panel
The signal is coming from upstream of the furnace board. Pull the Y wire off each zone input on the TrueZONE panel one at a time. Whichever zone disconnect kills the signal is the culprit.
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