Baxi Combi 130he hot water problem

[gastec]

Hello all the problem with it is it will not heat the water when running a bath, it fires up but no hot water, the heating works fine and other hot taps get hot but the temperture some times fluxuates. I have changed the plate heat ex, diverter cartridge and actuator. Any ideas?? Thanks

 

[bassmonster]

Have you checked the thermistor for dhw?

 

[kennedy1978mark]

Look at flowswitch or return thermistor

 

[gastec]

Hello. It has not got one there are 3 thermistors flow, return and safety. I have spoken to baxi several times but no joy.

 

[kennedy1978mark]

It should have a flow switch before the manual air vent off the heat exchange , ..

 

[gastec]

Sorry i was replying to bassmonster. Yes changed flow switch as well due to it leaking.

 

[spike.gb]

Is there a mixer shower fitted in the bathroom, could be faulty non return valves or none fitted. Shower could be feeding cold into the hot supply. Isolate the cold to the boiler and see if the water stops running from the hot taps, if water still coming out of hot taps you should be able to hear water passing through the mixer valve.