salaghband
I purchased a Navien NCB-240E unit in…
I purchased a Navien NCB-240E unit in mid-2021, and last week it unexpectedly stopped working. After contacting my installer and having the system diagnosed, I was informed that the main control board, circulation pump, and 3-way valve all need to be replaced at a cost of approximately $2,000. I am extremely disappointed with the quality and reliability of this product. A major failure of multiple critical components after only a few years of service is unacceptable, especially given the significant repair cost. I expected much better durability from a premium brand. My experience with both the product and the support associated with it has been very frustrating. A heating system is something homeowners rely on every day, and failures of this magnitude should not occur so soon. Based on my experience, I cannot recommend this brand and would seriously question purchasing another Navien product in the future.

