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  1. W

    Navien NPE-240 Frequent Ignition Failures now that it's below freezing out

    Some may remember a post I made months back for a backfiring issue. I've since had someone in and thought all issues were resolved. It appears not. Below are pictures, video and a timeline of events and attempts. I have a different person coming (soon hopefully), but any feedback is helpful...
  2. W

    Navien Tankless 240 A Making Pop sound from exhaust

    I had a Navien NPE 240a installed in my house 3 months ago. For the most part it works great. I had one instance where I got an ignition failure error, but I hit the reset button and haven't gotten it since. However, in the last week I became aware of a loud pop sound occurring that sounds like...
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