since turning up my heating there has been hot water running from the overflow. i turned it back down again and it is still happening. The pressure on the boiler is 2.
OK, you haven't read the rules on how to post on here fella. We need make, model, type of appliance and how old it is. Going off your limited information, could be the expansion vessel (EV) is defective, or the pipe/flex pipe that goes to the EV. Anyone worked on the appliance lately, or have you adjusted any valves etc etc...
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