How to repair 3 blinks error code.Post created: 2016-03-03 Type of Equipment: Furnace Views: 96
This question was created on the page: https://www.furnacecompare.com/furnaces/york/diamond-90.html.
On 2016-03-04 Gary wrote:
3 flashes means "Pressure switch stuck open." This could be a problem with the inducer or with a plugged vacuum hose. You can remove the hose from the pressure switch and blow through it to see if it is plugged. Unless you are experienced with working on furnaces, though, I'd advice you to contact a heating contractor to diagnose and repair it for you. If you'd like to have a contractor take a look at this, we can help you find one, here.