Category
Climate Control issues
11 guides
wiring diagrams, power errors, and sensor calibration for smart thermostats.
Ecobee Sensor Participation vs Comfort Settings (Why Rooms Don’t Match)
Explain why Ecobee thermostat rooms report different temperatures than expected and how to align sensor participation with comfort settings.
Ecobee Schedule Not Working: Resolving the Indefinite Hold Logic Conflict
Why your Ecobee thermostat ignores its schedule after manual adjustments, and how to fix the 'Hold Action' logic precedence.
Ecobee Stuck on Calibrating: Why Heat/Cool Disabled won't clear
Fix an Ecobee thermostat stuck on 'Calibrating: Heat/Cool Disabled'. Learn why this calibration happens and how to force it to complete.
Honeywell T9 Smart Sensor 'Signal Lost' Troubleshooting
Solutions for Honeywell T9/T10 remote sensors constantly dropping connection or showing 'Signal Lost'.
Ecobee Smart Thermostat: Blank Screen or Reboot Loop Fix
Diagnose why your Ecobee screen goes black or keeps restarting. Causes range from overheating limit switches to dropped C-wire voltage.
Ecobee Fan Runs Outside Scheduled Windows: Fix Logic Conflicts
Why your Ecobee fan keeps running when the system is off or outside of schedule, and how to fix 'Smart Recovery' and 'Fan Hold' logic conflicts.
Nest Thermostat W5 Error: Wi-Fi Chip Failure vs Network Issue
Troubleshoot the dreaded Nest W5 error code. Distinguish between a simple network drop and a permanent Wi-Fi chip hardware failure.
Honeywell T9 Thermostat: How to Clear 'Permanent Hold' Lock
Is your Honeywell T9 or T6 ignoring your schedule? Learn how to distinguish between Temporary and Permanent holds and fix Geofencing conflicts.
Nest Thermostat E74 Error: No Power to Rh Wire
Troubleshoot Nest Thermostat power errors (E74, E73, N260) caused by missing C-wires, tripped float switches, or HVAC fuse failures.
Ecobee Heat Pump Triggers Auxiliary Heat Unexpectedly: Threshold Fix
Why your Ecobee turns on expensive electric strip heat (Aux) when it's just mild outside, and how to lock it out using proper thresholds.
Nest Presence Detection Locks Temperature Indefinitely: 'Eco' Fix
Why your Nest Thermostat gets stuck in 'Eco' mode or ignores your schedule because it thinks the house is empty, and how to fix presence sensing logic.