Vaillant Combi / New bathroom/ inconsistent hot water

Joined
25 Jan 2010
Messages
1
Reaction score
0
Location
Bath
Country
United Kingdom
Hi all

Diving in with my first post here after being a long term lurker. I've searched for the answer to my problem, which has revealed a few possibilities but thought I'd post the problem to see if there's anything I've missed.

The root of my problem is inconsistent hot water in my bathroom.

I have a Vaillant Turbomax combi, and a newly installed Bathstore bathroom with a Metro (Crosswater, I believe) bath/shower thermostatic valve and Metro single-post mixer basin tap.

The bathroom is a floor below the kitchen. If I turn on the kitchen tap (very near to the boiler itself) I get scalding hot water.

If I turn on the bath filler I get water which isn't nearly as hot, and also fluctuates between hottish and lukewarm. The basin tap produces hot water, but it's not nearly as hot as the kitchen.

I have adjusted the bath/shower thermostatic valve to its max setting, with no improvement. I have also experimented with turning the cold supply to the bathroom off whilst filling the bath. This gives a slightly better result, but the water is still not nearly as hot as in the kitchen.

My diagnosis, from searching this and other forums, is that it could be a combination of
1. Faulty or gunked-up thermostatic cartridge
2. Scaled up heat exchanger in the boiler
3. Boiler not up to the job of supplying hot water to the bathroom

Any further ideas or suggestions?

Thanks!
 
When you are trying the water in the kitchen, is the tap just opened or full bore?

Could be to do with a flow restrictor in kitchen tap, whereas the bathroom stuff is possibly designed to give a greater flow.

The most probable of your thoughts is probably scaled up heat exchanger.

Graham
 

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
Back
Top