Error Code Code 14

Carrier 58MVP Error Code Code 14: Ignition Lockout

TL;DR
The system failed to ignite gas and prove flame in 4 attempts. Control will auto-reset after three hours. This fault could also indicate the gas valve relay GVR on the furnace control board is stuck closed, or there is a miswire/short to the gas valve wiring. Refer to fault code 34 for detailed causes.
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 Code 14 Mean?

The system failed to ignite gas and prove flame in 4 attempts. Control will auto-reset after three hours. This fault could also indicate the gas valve relay GVR on the furnace control board is stuck closed, or there is a miswire/short to the gas valve wiring. Refer to fault code 34 for detailed causes.

Common Causes

Cause Likelihood DIY?
Defective hot surface ignitor (HSI) Most common ✗ Call a pro →
Gas valve defective or gas valve turned OFF Common ✗ Call a pro →
Low inlet gas pressure Common ✗ Call a pro →
Oxide buildup on flame sensor Common ✓ DIY fix →
Inadequate flame carryover or rough ignition Uncommon ✗ Call a pro →
Green ground wire not connected to furnace sheet metal Uncommon ✗ Call a pro →

When to Call a Professional

Contact a licensed HVAC technician if:

Sources

  1. Carrier 58MVP Service and Maintenance Manual, p.11 – LED Codes
  2. Carrier 58MVP Troubleshooting Guide, p.16–17 – Fault Code 14