Thermostatic Shower Temperature fluctuates between hot/cold

[grh395]

If anyone has come across this problem and found a solution, I would appreciate your advice.
I recently had a Mira Realm Thermostatic shower fitted and although it gives a good forceful flow at a comfortable temperature to begin with, the temperature fluctuates all the time; it switches from hot to cold about every minute - which is maddening. It's ok now because it's summer but in the winter it's not going to be fun at all!

The shower is installed on a Glow worm Betacom 24c boiler system.

I have tried the shower with the flow adjuster fitted, and without, following a conversation with MIRA, but the problem is the same.

I have tried with the water output temperature of the boiler set on high, and low, but this doesn't appear to have any affect either.

I did ask, when I bought the shower, if it was OK for combi systems, and I was told it was.

Now, I wish I had bought an ordinary manual mixer shower but it's expensive to just chuck it away and get another one.

Any suggestions? [/b]

 

[Dan Robinson]

Dirty or clogged plate heat exchanger.

 

[MJGas]

Have you run a tap, like the kitchen or the basin in the bathroom for long enough? See if you have the same problem.

 

[grh395]

Dirty or clogged plate heat exchanger.

Thanks for the suggestion. Is this a common problem?
Is there anything I can do as a user, or is this a job for a specialist?
Thanks

 

[grh395]

Have you run a tap, like the kitchen or the basin in the bathroom for long enough? See if you have the same problem.

Yes - I have tried a tap in the basin in the bathroom and there is a little fluctuation but nothing like the experience in the shower where the hot water appears to shut off.

 

[Fluffster]

Are you sure the hot and cold feed to the shower valve are on the correct side, usually hot to the left side.

Pete

 

[grh395]

Are you sure the hot and cold feed to the shower valve are on the correct side, usually hot to the left side.

Pete

Thanks for your feedback - I checked the supply and hot and cold appear to be on the correct sides.