Why is my forced-hot-water system heating when the circulator pump is not running?
I have a phoney-hot-water heating system with three zones, first floor, second floor, and water tank. After some subsistence on the system the second floor is constantly heating, even though the thermostat is off. I checked the voltage on the circulator bail out and it is zero, so the pump is not running. It sounds like it is acting like a gravitas-fed system. There are manual valves on the system, but the only things in the loops that are controlled by the thermostats are the circulator pumps. Do the pumps act as valves when they are not pumping? That was my suspicion so I replaced the pump, but my registers are still hot. If the pump does NOT act as a valve, what is assumed to prevent the hot water from moving through the system when the pumps are not running? I require some HVAC basics here. Thanks!
It sounds like your move control valve is stuck! The circulator pumps does not act like a valve. you said you had preservation done. the person doing the maintenance could have turned the lever on the issue control valve accidentally causing it to momentousness feed. If the lever did not get turned TAP on it with a hammer sometimes rust will cause the valve to stake open. I would tap on it first if you are not sure if the valve got turned or not.






















