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Weil Mclain Ultra boiler noise
We just put in an ultra 80 boiler in the house and works great and can see where it is gonna be very efficent. The problem is that if it has sat idle for a while and starts up we get a loud humming noise through the chimmny vent pipe. It lasts about 15 to 30 sec and then will quit and run quietly after that till is sits for a while again. It really dont hurt anything other than it is annoying to listen to. Any ideas here?