When I take a shower, the temperature of hot water ranning up and down. The boiler turn on/off.
I try to close the cold water supply the boiler, less water but constantly...? why?

Saronno, March 2010

Hi problem with Aqua tronic4+ shower running very hot then cold as water returns hot. Bussing noise from inside unit please help

Joe Brighton, April 2010

light a candel run you hand through flame fast and you do not feel it, run your hand slowy it HURTS.
Same with the boiler water run too fast not hot sloly hot.
Plus the thermiser state on the boiler could fault or the hot water heat exchanger could be choked up, and needs cleaning out.

erj, March 2010