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Posted by Dave on May 20, 2006 at 21:09:23:
I have the Lochinvar boiler with Ergomax tank. It has been practically silent until tonight. I heard this kind of groaning as the boiler was trying to heat DHW. I went downstairs and boiler was definitely making the sound, and I could bfeel vibration in pipes to Ergomax tank.
The only thing I noticed that was weird was that our system pressure was lower than normal (about 15) even though the water was at temp.
Could the low pressure cause the vibration we were hearing? What would cause the pressure to be low like that besides a leak? We have 50:50 water and glycol and have no leaks anywhere. Thanks.
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