Error Code Pressure Switch Failed to Close
Coleman DGAA056BDTA Error Code Pressure Switch Failed to Close: Pressure Switch Failed to Close
TL;DR
Combustion air pressure switch failed to close — the normally open pressure switch contact did not close at the beginning of the heat cycle. This could be caused by a faulty inducer, blocked vent pipe, broken pressure switch hose or faulty pressure switch. 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 Pressure Switch Failed to Close Mean?
Combustion air pressure switch failed to close — the normally open pressure switch contact did not close at the beginning of the heat cycle. This could be caused by a faulty inducer, blocked vent pipe, broken pressure switch hose or faulty pressure switch.
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