Lennox Furnace Error Code E228: How to Fix It

Q: What causes Lennox furnace error code E228?

Error code E228 is typically caused by restricted airflow due to dirty air filters, blocked vents, faulty blower motors, damaged pressure switch tubing, or a malfunctioning low-pressure switch itself.

Q: Can I reset Lennox error code E228?

You can try resetting the furnace by turning off power for 5 minutes, but E228 will return unless the underlying airflow or pressure switch issue is resolved. Simply resetting won't fix the root problem.

Q: Is it safe to run my furnace with E228 error?

No, never operate your furnace with error code E228. This safety feature prevents dangerous conditions like overheating or improper combustion. Running the furnace could cause serious damage or safety hazards.

Q: How much does it cost to fix E228 error?

DIY fixes like replacing air filters cost $15-30. Professional pressure switch replacement typically costs $150-300 including labor. Blower motor issues can range from $300-800 depending on the problem.

Q: How often should I change my air filter to prevent E228?

Replace standard air filters every 1-3 months, or high-efficiency filters every 6-12 months. Check monthly during heavy use seasons. A dirty filter is the most common cause of E228 errors.

Abstract

Lennox furnace error code E228 indicates that the low-pressure switch has failed to open, meaning your furnace isn't detecting proper airflow through the system. This safety feature prevents the furnace from operating when there's insufficient air circulation, which could lead to overheating or combustion issues.