Hot water kitchen - Cold water bathroom

[denso13]

Diverter needs toi divert somewhere, so if the combi is detecting the flow, but no hot water in bathroom... Where has it all gone?

You said the heating flow was warming up?

 

[andsotobed]

Assuming that the diverter is faulty, would the radiator water not be diverted into the hot water system. I mean, if it diverts one way should it not also from time to time divert the other way too?

 

[andsotobed]

I have not noticed the radiators getting warm, but will run a test tomorrow morning once the radiators go off.

 

[CountryFan]

Assuming that the diverter is faulty, would the radiator water not be diverted into the hot water system. I mean, if it diverts one way should it not also from time to time divert the other way too?

Not really no.

 

[andsotobed]

so where is the hot water going? Hot water tap is open, boiler fires up, cold water comes out of the tap. What is the boiler heating up, and if it is water, where is it all going to?

 

[andsotobed]

oooh, another thought, could the heat exchanger be responsible somehow?

 

[andsotobed]

radiators all stay stone cold

 

[denso13]

oooh, another thought, could the heat exchanger be responsible somehow?

Get the diverter fixed first.

 

[whistler]

Can you isolate the cold feed to the bathroom then see if hot water comes through the mixer tap?

 

[CountryFan]

so where is the hot water going? Hot water tap is open, boiler fires up, cold water comes out of the tap. What is the boiler heating up, and if it is water, where is it all going to?

I thought it was established that it’s circulating around the heating system.

 

[andsotobed]

UPDATE: Starting to suspect the Secondary/Plate Heat Exchanger: Kitchen tap gets plenty of hot water, however, does not get as hot as before. Batthroom taps will get hot water when running at reduced flow approx. 50% rate. When bathroom taps open full flow I only get warmish water which sometimes drops to stone-cold and then after a while, back to warm.

At no point do any radiators warm up when hot water taps are on, even when only cold water comes out of taps.

 

[denso13]

no point do any radiators warm up when hot water taps are on, even when only cold water comes out of taps.

You said the heating flow was getting warm when the hot water was running?