Bryant furnace LED off: No Power
Try DIY first, then call a pro
Bryant furnaces share the Carrier control platform — this code table applies to the equivalent Bryant models. Confirm against your unit's panel label.
Why is the status light off on my Bryant furnace? Official: check for 115VAC at L1/L2 and 24VAC at SEC-1/SEC-2. No light means the board isn't powered.
Before you touch anything: the six signs that mean stop troubleshooting and call a pro →
GOOD NEWS: THE FIRST CHECKS ARE FREE AND TAKE MINUTES.
Try these first — in this order
Breaker and blower-door switch first.
Transformer and supply-side diagnosis. DIY part cost: $25–60 — a pro visit for this class of fault typically runs $150–350.
What causes it (in order of likelihood)
- Tripped breaker / door switch open DIY-CHECKABLE
- Failed transformer (official flowchart: replace transformer) TECH
Parts referenced by this code
Always match parts against your model's parts list — part numbers vary within a series.
Questions about this code
Why is the status light off on my Bryant furnace?
Official: check for 115VAC at L1/L2 and 24VAC at SEC-1/SEC-2. No light means the board isn't powered.
How do I fix Bryant furnace LED off?
You can confirm the thermostat has power and the blower door looks fully closed. Breaker, door-switch, transformer, and voltage checks are technician work.
How much does it cost to fix Bryant furnace LED off?
Cost depends on where power is lost, whether at the supply, the door switch, or the transformer. A technician's diagnosis narrows it down.
Applies to
Bryant 310/311/312 series
Different Bryant generations use different code maps. If your series isn't listed, don't assume this meaning — check your blower-door label.
Same control platform, same code: Carrier furnace LED off · Payne furnace LED off
Verified against Carrier 58STA/58STX Installation & Service Instructions (1106202L), p.37 — “CONTINUOUS OFF - Check for 115VAC at L1 and L2, and 24VAC at SEC-1 and SEC-2”
Bryant 310/311/312 series furnaces use the Carrier 58STA/58STX control platform. No separate Bryant service document is cited — confirm the code map against your unit's panel label.
Last verified 2026-07-06 · page updated 2026-10-03 · how we verify
Related Bryant furnace codes
These codes use the same status led — short + long flash codes system.