Bryant Furnace: 5 Flashes
Code 52.1 / 52.2: Supply Air Temperature
WarningShown as: 5 short flashes, 2 long flashes
Supply Air Temperature (SAT) sensor fault. 52.1 means the SAT sensor connection is open; 52.2 means the SAT sensor wires are shorted.
Manual wording: “52.1 SAT OPEN - Supply Air Temperature sensor connection is open 52.2 SAT SHORT - Supply Air Temperature sensor wires are shorted”
Documented for: 926TC
Likely causes, most common first
- Loose connection at the control board screw terminals
- Cut or shorted wires to the SAT sensor
- Damaged SAT sensor
When to call a technician
The sensor wiring lands on the control board inside the furnace cabinet - have a technician check the connection and sensor.
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