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Harringay, Haringey - So Good they Spelt it Twice!

Hi

The hot water in my shower has become unpredictable recently. I get some hot water for a little bit then it starts to get cool and then warms up a bit again and so on. I have it turned up to the maximum on the temperature control but it doesn't seem to make any difference. Has anyone else experienced this? Hope someone can help as I really like steaming hot showers not lukewarm ones - particularly when it's this cold!!!

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Very much depends on the type of shower! If it's a stand alone type straight from a boiler it's probably a failed thermostat inside which might just need descaling. If different type please say...

Yes Philip - it's a shower attached to the bath - straight from a boiler.

Do you have a combi boiler?

Yes it is a combi boiler

It might be water pressure got too low on your boiler - check the dial on your boiler. Usually on a combi, you have to raise it once a year as it can drop. It's easy to do yourself.

Thanks Justine. I will give that a go as I haven't done it a while. I really hope that will do the trick as I'm really not enjoying taking a shower at the moment!!!

Justine thanks for your tip!! It seems to have done the trick!! I am so glad it wasn't something more complicated than that!!!

That's great news!

If it's fed from a basic mixer tap on the bath it seems most likely that the diverter is not working properly.that needs looking at but you may need to replace the tap. I assume the hot water to bath/kitchen is ok?

It's not from the mixer tap on the bath. There's a separate shower control. The hot water in the kitchen seems ok but it's hard to say because I don't leave the hot water running for as long and can't tell if it's not getting as hot

Combi boilers usually have a thermal cutout which kicks in at low flow-rates to stop the water getting too hot - perhaps the flow-rate for your shower is (sometimes) lower than that? Certainly my hot kitchen tap runs hot then cold then hot if I turn it down low, as does my shower. Perhaps in this case more IS more?

Run the hot tap in bath or sink to see if it's working properly. Can't think why you haven't already. Check the pressure on the boiler dial is in the green. It can drop gradually and still function ok until it's almost zero. If so you need to pressure it up.

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