Urgent assistance - any plumbers in the house ?

[macp]

Morning all and a happy new year

Not the best start to the year when crawling into the shower to find there is no hot water!!

I dont have an immersion heater or tank my hot water is via a Worcester boiler which is firing and there is hot water through the taps upstairs and downstairs.

My shower set I notice has an external thermostat on the mixer similar to the one below.When I mess around with it there are variations in temp but still not hot.I suspect this is the problem so would the whole mixer set need replacing is this a DiY job & do I have to replace with exactly the same mixer set ?



Thankyou in advance for your help.

[dirkgently]

Remove from wall (turn water off)and clean the filterers.
Remove the temperature control you will find a large nut,unscrew this and the thermostatic cartridge will come out.
boil a kettle (you did fill the kettle didn't you),pour some hot water into a bowl and add some vinegar, drop cartridge into solution and allow to cool.
Reassemble and test.

Sometimes works. HTH

[macp]

Cheers Dirk

There is one philips screw on the thermostat knob which I have unscrewed and taken off the knob.Underneath is a knurled black plastic knob but there are no obvious signs of a nut ?

[Festive Ferg]

Does it have a push on plastic part near the body? Some do. Try pulling stuff. Then exactly as dirk says. I've descaled loads.

[macp]

Just took a couple of pics

This is obviously the thermostat knob




And this is underneath when the knob is removed

[Festive Ferg]

Hmm..never had one of those apart!!

This any good:
http://www.grohe.co.uk/lib/0/catalogue_p1/gw/en_UK...

I'm not guaranteeing that's the right shower...does it look right?

Edited by Festive Ferg on Saturday 1st January 11:52

[macp]

Festive Ferg said:

Hmm..never had one of those apart!!

This any good:
http://www.grohe.co.uk/lib/0/catalogue_p1/gw/en_UK...

I'm not guaranteeing that's the right shower...does it look right?

Edited by Festive Ferg on Saturday 1st January 11:52

Not exactly the same Ferg but very similar in that the retaining ring should come off.

Thanks

[Festive Ferg]

They probably use the same cartridge with different handles etc. Take notes or photos when you take it apart....

[timbobalob]

This is strange - without wishing to hijack (maybe this can help the OP as well), I've had exactly the same problem this morning...

There is hot water coming out of the taps in the bathroom, though even on the hottest setting it's luke warm at best. I've just cleaned the thermostatic cartridge (though the shower is only 3 months old) and it's no better. If I isolate the cold only the shower runs very hot, but as soon as the cold goes back on it's back to luke warm.

It's been fine up to this point...

OP - any joy getting the cartridge out?

Happy New Year!

[macp]

Update:

Got the plastic collar off thanks again ferg the exploded drawing helped.Underneath is this large brass nut which I have tried to turn using a large pair of mole grips and its not budging without wrenching the mixer off the wall.I have soaked it in WD40 in the hope this will lubricate it.

[thinfourth2]

Might have a go at this myself as our shower is getting colder and colder

[macp]

Thanks everyone

All seems well again I havent yet undone the brass nut but pushed the spring in and out and recalibrated the temp knob so it allows more hot water to the mix.

[Festive Ferg]

Excellent!