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Blog Title: What can cause furnace lock out?
What can cause furnace lock out?
Category: Wall Ac And Heat Units Post By: Lilly Joseph (Key West, FL), 09/28/2016

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.

- J. Moore (Tallahassee, FL), 10/01/2016
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