BAXI 105E Combi boiler - No hot water fault.

[majemoss]

Hi all, i've recently been having problems with my DHW. The problem is the boiler seems to be firing up and heating up the water but its still running cold. Although the radiators are boiling hot and their not switched on. Is it possible the water is escaping down the CH flow?

To try and eliminate this i've turned off flow and return but still water is running cold, is there anywhere else it could go?

I've checked the microswitches and the plungers, when i turn on the hot water the hot water plunger comes out ok and presses the switch, at the same time the other plunger i guess for CH comes out also and presses the switch. should this happen? any ideas on whats causing the problem.

 

[baxpoti]

Start with further investigation of the diverter or plate heat exchanger to see if they are operating correctly.

 

[Agile]

Yes, it sounds as if the diverter valve is stuck in the Ch position and when you try to get hot water it only heats the rads!

Tony

 

[majemoss]

hi thanks for replies i will let you know how i get on

 

[LUNAT]

HI

yes both switches operates when hot water is on.and in your case diverter valve need replacing.