Hot water not getting into heating system

[PhilT]

Hello, I am look some advice. Our boiler heats the water for the radiators, but the hot water only makes it as far as this component ( pump is above it). It has a temperature sensor in it reading air temperature in the void, but I think it must have a cross over in it from the central heating return I think as the pump runs but just seems to circulate the water at circa 25degC, not adding in the water from the boiler that is around 80C. Ci don’t understand how it’s workings at present so not sure where to start trying to sort it. Any advice greatly received.

Thanks
Phil

 

[Dan]

And you're from Germany yeah?

I assume there are laws there the same as the UK that say you can't mess with boilers?

But pumps. Surely you can mess with a pump?

 

[PhilT]

And you're from Germany yeah?

I assume there are laws there the same as the UK that say you can't mess with boilers?

But pumps. Surely you can mess with a pump?

Hi Dan, yes I live Germany and would not be messing with the boiler, I am just trying to understand how I it works and it is a setting issue or something needs bleeding, flow rate changing etc. I am certainly no expert but have not seen that parrot before or understand how it’s working.

 

[Gasmk1]

Looking at it the first part is probaly a low loss header the bit above w probably contain the pump

 

[PhilT]

Looking at it the first part is probaly a low loss header the bit above w probably contain the pump

Is there anything that needs setting up on these usually or do they not have any moving parts? I think this where the issue is as the hot water from the boiler isn’t getting past this point

 

[Gasmk1]

Have a look under the insulating cover on the one with 2 guages the pump may be there

 

[Dan]

Thanks for helping @Gasmk1 🙂

I'm taking note. New tags will be dished for helpful people. 🙂

 

[Brambles]

That is a Bosch preassembled modular heating system. The pump and bypass et al are inside the larger box with the two gauges on it. They are very common in Austria / Germany, but not in the UK. You can replace the component parts, but the intent is that you replace the complete unit when / if it fails. They are normally seen connected in parallel to feed separate pumped zones.

I would guess that your issue is a pump failure / blockage.