Bryant Furnace Code 19.1
WarningShown as: 1 short flash, 9 long flashes
InteliSense communication loss - the furnace control has lost communication with the ecobee for Bryant thermostat.
Manual wording: “19.1 INTELISENSE COMMUNICATION LOSS - Loss of InteliSense communications with the thermostat.”
Documented for: 926TC
Likely causes, most common first
- Loose or broken R and Y wire connections between the control and the thermostat
- Thermostat not configured for InteliSense
What you can safely check yourself
- Check that your thermostat still powers on and responds
- Check the thermostat's batteries if it uses them
When to call a technician
The thermostat wiring and InteliSense configuration should be checked by the dealer who set the system up.
A Bryant furnace throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.
Source
- Installation, Start-up, Operating and Service and Maintenance Instructions - 926TC (Bryant Heating & Cooling Systems, 926TC Preferred Series two-stage, variable-speed ECM multipoise condensing gas furnace) · checked 2026-08-25