I have a floor standing oil boiler (Worcester). Header tank in attic.
The overheat cut out was turning off the boiler.
The CH engineer has replaced the solenoid, heat sensor and electronic control. he cited failure of the solenoid.
Now the system is overheating, turning down the boiler thermostat seems to cut off the burners, but the CH system still gets too hot . The domestic hot water heats correctly. tank stat set at 60
The header tank also gets hot, there is a 9" space between water level and overflow pipe.
I drained some water out of the rad and it was black but not sludge , that I could see.
I did wonder if the symptoms had been fixed but not the problem in other words was there an original overheat problem that caused the solenoid to fail?
Anyone have any ideas that might help?
The overheat cut out was turning off the boiler.
The CH engineer has replaced the solenoid, heat sensor and electronic control. he cited failure of the solenoid.
Now the system is overheating, turning down the boiler thermostat seems to cut off the burners, but the CH system still gets too hot . The domestic hot water heats correctly. tank stat set at 60
The header tank also gets hot, there is a 9" space between water level and overflow pipe.
I drained some water out of the rad and it was black but not sludge , that I could see.
I did wonder if the symptoms had been fixed but not the problem in other words was there an original overheat problem that caused the solenoid to fail?
Anyone have any ideas that might help?