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Mend GWA 175NS Home Heating Systems

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Mend GWA 175NS Heating System Zone Valves Hot Water

boiler bangs when zones shut down?

i have a new gwa hot water boiler model 175ns with 4 honeywell zone valves v8043e1012 controled with a argo az4cp when any zone shuts off i get a bang in the area of the valves it happens even right after i bleed each zone

macko
February 2011
GWAGWA 175NSHeating, Home Heating SystemsHeating System Zone Valves Hot Water
It sounds like the new pump is too powerful, forcing the valves shut/open.
Look to fit a small system by-pass on the primary flow/return pipework.

Carefree
February 2011

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Free repair help for GWA 175NS home heating systems