Thankyou Kash had that done and has worked. Many thanks.
citizensmith
February 2013
u have a hole in the dhw (domestic hot water) heat exchanger. its taking water from the hot supply and feeding it into the heating water. u will need to fix it as it can contaminate the cold drinking water.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.