hot water problem?

I had the same situation couple of years back. Changed the diaphram and all is ok untill now,so went and got another diaphram.

Rajan Patel
April 2009

Without knowing this boiler very well, it sounds like the diverter valve is not functioning correctly. Most combi boilers have a valve which cuts off the heating circuit and then sends the flow through a heat exchanger that heats the incoming cold water. If the valve is unable to close off the heating circuit when hot water is called for, then the boiler is trying to heat both the incoming cold water and the heating water, when the rads are hot, you will get hot water, when cold, you will get slightly warmed hot water. Need to investigate the diverter valve and its actuator

Jason
March 2009