First time poster...avid reader. In november the oil furnace tech came to do the annual inspection and cleaning. Apparently, he needed to replace the transformer, which he did. So the other day I happen to be down near the furnace and notice a humming sound. It is the circulator pump. It seems even with the heat side of the boiler off, the pump is still running. It never used to be that way. When we turned the heat off, the pump was off as well. It also looks like something is missing. Just from memory, I think there was either a relay or a seperate transformer wired in before the pump to prevent it from running all the time. Does anyone know what is missing and hoe it's supposed to be wired in. I would call the oil company again but were in the country and don't have a choice who to use and I don't like who were stuck with. I really don't want to pay for another service call. Thanks, Rick Almost forgot... it's a John woods JWF 307V boiler White-Rodgers 8A05A-101 transformer Grundfos pump thermostat is wired to the R and G terminals of the transformer, Com is open
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17 years ago