Error Code 15
Bryant 355MAV Error Code 15: Blower Motor Lockout
TL;DR
Blower failed to reach 250 RPM or failed to communicate to the variable speed furnace control within 30 seconds after being turned ON in two successive heating cycles. Control will auto reset after 3 hours. Refer to status code 41. Disclaimer
This article is for informational purposes only and does not guarantee the accuracy or completeness of the information provided. Always turn off power and gas supply before attempting any repairs. If you smell gas, leave immediately and call your gas company. Consult a licensed HVAC technician for diagnosis and repair. Any actions taken based on this information are at your own risk. What Does Code 15 Mean?
Blower failed to reach 250 RPM or failed to communicate to the variable speed furnace control within 30 seconds after being turned ON in two successive heating cycles. Control will auto reset after 3 hours. Refer to status code 41.
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Failed blower motor | Most common | ✗ Call a pro → |
| Blower motor wiring issue | Common | ✗ Call a pro → |
| Defective furnace control board | Uncommon | ✗ Call a pro → |
When to Call a Professional
Contact a licensed HVAC technician if:
- Basic troubleshooting did not resolve the error
- You smell gas at any point during the process
- You are not comfortable working around gas lines or electrical components
- The unit needs a gas valve, control board, or motor replacement