Central Heating

water pump won't stop after boiler stopped, and boiler malfunction

Anonymous user 28/02/2024 - 3.17 PM

Hi, I have a santon premier plus PP210B unvented indirect cylinder up at 2nd floor in conjunction with a POTTERTON PROMAX 15 SL boiler placed down in the kitchen, and experience the following problems: 1) During summer time when we only need shower, everything works perfectly. 2) Once we turn the heating on during winter time, we get the following: a) The water pump (SurePump SP65/130) that sits just close to the Santon cylinder won't stop spinning once the boiler downstairs stops burning gas. b) Sometimes, the Potterson shows the lower-right LED (visible after detaching the magnetic lower cap) becomes blinking red, and the boiler won't start burning. c) A shutdown from the switch found close to the Potterson control panel for a couple of hours, puts the system back in function. The system will “recover” or start working normally sometimes if the reset (from the lower-right side of the boiler) button is pressed. When the pump does not stop working, I noticed that @ the reset button, there are visible the normal green LED but also a blinking red LED light … reseting it or power cycling the boiler will get rid of the red blinking light. Does anyone have a guess of what might cause the above symptoms? Thanks, Mark