There are several troubleshoots the furnace sticker lists that might be the problem. I point out several of them. If you dont care to learn anything about the furnace and what sets off an error code 33, then just skip to 6:00 to see the fix. But for most people I think it would be helpful to watch the whole thing, (sure would have saved me a ton of time.) But now I know a lot about furnaces!
#33 LIMIT CIRCUIT FAULT – Indicates a limit, draft safeguard, flame rollout, or blocked vent switch (if used) is open. Blower will run for 4 minutes or until open switch remakes whichever is longer. If longer than 3 minutes, code changes to lockout #13. If open less than 3 minutes status code #33 continues to flash until blower shuts off. Flame Rollout switch and BVSS require manual reset. Check for:
- Restricted Vent
- Proper Vent Sizing
- Loose blower wheel
- Excessive wind
- Dirty filter or restricted duct system
- Defective blower motor or capacitor
- Defective switch or connections
- Inadequate combustion air supply (flame rollout switch open)
Bryant Heating and Cooling Systems
Natural Gas
Central Furnace
Model Number 310AAV048135 / 310AAV048135ACJA
Manufactured JUL 2006
1/2 HP Motor
Post time: Jul-30-2017