Carrier Heat Pump Error Code 23: How to Fix It

Q: What causes Carrier error code 23?

Error code 23 is caused by a pressure switch that fails to close, typically due to blocked venting, a faulty induced draft motor, damaged pressure switch tubing, or a defective pressure switch itself.

Q: Can I run my Carrier heat pump with error code 23?

No, you should not run the heat pump with error code 23. This safety feature prevents unsafe operation when proper ventilation cannot be verified, which could lead to dangerous conditions.

Q: How much does it cost to fix error code 23?

Costs vary depending on the cause. Clearing blockages may cost $100-200 for service call. Pressure switch replacement typically costs $150-300. Induced draft motor replacement can cost $300-600 including labor.

Q: Is error code 23 dangerous?

Yes, error code 23 indicates a safety issue with ventilation. The system shuts down to prevent potential safety hazards. Do not attempt to bypass this safety feature.

Q: How can I prevent error code 23?

Prevent code 23 by regularly checking and clearing outdoor vents, scheduling annual HVAC maintenance, keeping the area around your unit clear of debris, and promptly addressing any unusual noises or performance issues.

Abstract

Carrier heat pump error code 23 indicates the pressure switch failed to close, which means there's either an induced draft motor problem or a vent blockage preventing proper airflow. This is a high-priority issue that can prevent your heat pump from operating safely and efficiently.