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Navien 180A making noises every few minutes
We headed out for vacation last week, and turned off the water to the house. We returned yesterday, turned the water back on, and noticed our Navien 180A making noises for 30 seconds every 5-10 minutes. See video below. Any ideas of things to try before we call the manufacturer? Thanks.https://photos.app.goo.gl/fyfHSh1ZAsU1xXK19