Why does HōlHōm display the message “FILTER FAULT DETECTED”?
This feature is only available if your heating and cooling equipment supports it. Some furnaces can send a message to HōlHōm when the air filter needs to be changed. The “FILTER FAULT DETECTED” message displays in full-screen mode, and the backlight flashes on and off until you acknowledge the message. The message then appears in the status line of the home screens until the issue is resolved.
Check your HVAC equipment to see if there is a filter fault and if so replace the filter. If the filter fault shows on the thermostat when there is no fault at the HVAC equipment then disconnect the “Filter” wire on the thermostat because it is not compatible and it is optional.
If you use this feature, do not use the filter reminder on your thermostat. Set the filter reminder to 0 months.
Note: Your HVAC equipment will continue to run normally when there is a filter fault warning.