Remeha Boiler - Central Heating Goes Cold When Hot Water Tap On

[Adam135]

Hi,

I have a problem with the following boiler and was wondering if someone could shed some light on it:
Its a Remeha Avanta 28C.

The hot water works fine all the time.

When the central heating is turned on the heaters will get warm perfectly fine.

However when the hot water tap is used the heaters will then go cold until the hot water is turned off and then they will warm up again.

The expansion vessel was found to be faulty and has been replaced.

Any ideas would be appreciated.

Thanks.

 

[CBW]

That’s how a combi boiler works.

 

[MeldrewsMate]

The boiler can only heat one thing at once, and hot water takes priority, so when you draw hot water the boiler power is diverted to it and none to the radiators.
I'm surprised that you noticed 'the heaters going cold'. That would indicate that you have run hot water continuously for 20 minutes or more...and that you are using heating in July.
You can't be a proper Yorkie; they'd only have heating for Christmas and New Year as a treat.

 

[muggles]

Sounds like it's working perfectly

 

[Adam135]

Thanks for the replies everyone.

The boiler can only heat one thing at once, and hot water takes priority, so when you draw hot water the boiler power is diverted to it and none to the radiators.
I'm surprised that you noticed 'the heaters going cold'. That would indicate that you have run hot water continuously for 20 minutes or more...and that you are using heating in July.
You can't be a proper Yorkie; they'd only have heating for Christmas and New Year as a treat.

Love it lol!
Yes I did run the water continuously!
I wasn’t actually using the heating as to heat the house I was rather testing the boiler!
As it’s a recent house I moved into and the boiler wasn’t working at the start and now that it is i left everything running to see if all was in working order. I assumed the heaters should not go cold!

 

[ianmcd]

that is just how your or anyone elses combi boiler works