Rich F.
New Member
Navien 240 Combi. When making DHW for a bath or shower, temp on the unit shoots up to 160-180 and it makes a high pitch whistling and rattling. I popped the cover off and the rattling seems to be coming from the heat exchangers. Unit has been working fine for a few years and flushed once a year by me.
The gas utility did come and swap the meter on my house last year as part of them running a new gas line on my block.
What gives?
The gas utility did come and swap the meter on my house last year as part of them running a new gas line on my block.
What gives?
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