Miswired Thermostat – Commands Gone Confused

A simple wiring mix-up can cause bizarre behavior: heat on cool mode, fan off in summer, or system running backwards.
Chatterbox identifies these anomalies by comparing thermostat commands to equipment response. If the data doesn’t align, it’s almost always wiring or configuration.
After correcting one swapped wire, the homeowner’s system finally obeyed every command—and ran more efficiently because it wasn’t fighting itself.