Combi boiler takes aaaaages to heat the radiators

[Gabriela67]

Hello everyone,

A few months ago I had a new combi boiler installed to replace the old, traditional boiler. New boiler is Vaillant EcoTEC pro 24. The house is a 3 bed terraced with 1 bathroom and 7 radiators.
The hot water works fine and comes on quickly, but the radiators take ages to heat up.
After 15 mins of turning the heating on the radiators are still cold and barely starting to warm up.
After 40 mins the temperature is 42 degrees (the radiators are warm, but not hot). The temperature after an hour shows as 56 degrees and it’s only after 1.5 hours that the radiators are finally hot and the temperature on the boiler goes up to 71-73 degrees.
Is this normal??
I bled all the radiators and they all eventually get very hot but in my previous flat it only took 10 -15 mins for my old combi boiler to heat 5 radiators.

 

[CBW]

What did your installer say?

 

[Gabriela67]

I haven’t managed to get hold of them so I was trying to figure out if this is normal with modern boilers before I persist on getting hold of the installers

 

[JonathanM]

I haven’t managed to get hold of them so I was trying to figure out if this is normal with modern boilers before I persist on getting hold of the installers

Definitely not normal. It should work more like the one in your old flat.

 

[Gabriela67]

Hello, I thought I’d give an update in case it helps anyone reading this post who has the same issue. The installers came round and said that the boiler’s default setting was to increase the temperature very slowly and that installers normally change that setting when fitting a new boiler. So he changed the setting and now it works as intended

 

[JonathanM]

Hello, I thought I’d give an update in case it helps anyone reading this post who has the same issue. The installers came round and said that the boiler’s default setting was to increase the temperature very slowly and that installers normally change that setting when fitting a new boiler. So he changed the setting and now it works as intended

I'm glad there was an easy fix, and it's all working properly now.