A flashing vacation icon can mean that an external control has placed the TH115-AF-GA in Vacation mode.
On the TH115-AF-GA covered by the linked manual, the suitcase icon indicates Vacation mode.
- When Vacation mode is selected with the suitcase button on the thermostat, the icon appears without flashing.
- When a connected remote dry contact activates Vacation mode, the icon flashes and the thermostat buttons are locked. The mode must be released by that remote device; when the contact opens, the thermostat returns to its previous mode.
If no remote control is intended, have a qualified installer inspect the wiring with electrical power disconnected. The manual assigns the floor sensor to terminals 1 and 2 and an optional remote contact to terminals 2 and 3.
Do not assume that every wire on terminal 3 is incorrect, or that the flashing icon alone proves the thermostat is defective. Confirm the exact model, wiring, and remote-control status before replacing it.
Sources
- Manufacturer instructions (publication 12984), PDF pp. 10 and 19; printed pp. 8 and 17.