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View Full Version : Two blinking red lights, not running, open pressure?


Dean1956
Feb 16, 2013, 04:21 AM
My furnace is not running. Two red lights are blinking meaning "pressure open". What does this mean and how do you fix it?

Dean1956
Feb 16, 2013, 04:38 AM
My gas furnace is flashing two red lights saying "pressure open". What is this and how can I fix it? Do I need a professional?

ma0641
Feb 16, 2013, 08:33 AM
One of your pressure switches is not working. Open the front of the unit, at the burners, and look for a round disc with a plastic or rubber tube. Make sure it is unobstructed. You may have also have a partially obstructed vent pipe, especially if you have a 90% heater. Your inducer fan may not be working. It supplies air pressure to close the switch. If you know nothing about heaters, suggest you get someone to look at it.