Split Air Conditioning System - Blogs & Forums On Electric AC & Heating Units

Blog Title: What can cause furnace lock out?

Main Que: What can cause furnace lock out?

  • Category:
  • Query By: Lilly Joseph (Key West, FL)
  • Date: 09/28/2016

Answer: The furnace lock out can be caused by variety of reasons such as faulty flame sensor and defective ignitor. It can also be caused if fuel pressure is not enough or if the heat exchanger is overheating. Dirty filters and venting problems can also cause it.

  • Replied By: J. Moore (Fort Worth, TX)
  • Replied Date: 10/01/2016