Warm not hot

[Taff]

Hi, currently in my rental property, we have a shower on the 2nd floor right next to the hot water tank and boiler. We also have a shower on the 1st floor. When we moved in hot water in the showers was lovely however, now the shower next to the boiler on the second floor just gets to Luke warm. If I run the shower downstairs it’s boiling. All taps are boiling too. I’ve even cranked the temp on the tank up still no difference. If I turn a cold tap on the shower becomes a lot warmer. Any ideas here’s a pic 

 

 

[ProDave]

Assuming it's a thermal mixer shower, the thermostatic cartridge has failed and is is no longer adjusting to maintain the temperature.

 

If it's rented, notify the landlord.  If you are the landlord, replace it.

 

Post a picture of the shower, the problem is not at the tank.

[PeterW]

Boiler circuit pressure is slightly low, but that won’t affect the showers. More likely it is the shower itself - thermostatic caps can fail after a while and this is what happens. 

Edited January 7, 2021 by PeterW
Crossed with ProDave

[JFDIY]

Not related, but expansion vessel should be fixed to the wall?

[Taff]

Thermostatic caps is that a big job hopefully only a month or two left in this property

[Taff]

14 minutes ago, JFDIY said:

Not related, but expansion vessel should be fixed to the wall?

Yep it’s been like that from move in it passed all the inspections pre rental

[Taff]

Here’s the offender 

[Temp]

If you don't know the make it might be easier to replace the whole mixer. The distance between pipes can vary so check that before purchase.

 

£46..

https://www.toolstation.com/stroma-thermostatic-bar-mixer-shower-valve/p53764

 

£43

https://www.toolstation.com/modern-thermostatic-bar-mixer-shower-valve/p88398

 

£39

https://www.screwfix.com/p/rize-exposed-thermostatic-mixer-shower-valve-fixed-chrome/491FV?tc=IB6&ds_kid=92700046986170840&ds_rl=1241687&ds_rl=1245250&ds_rl=1245725&ds_rl=1245250&gclid=CjwKCAiA_9r_BRBZEiwAHZ_v15Ak8TZEE0wU5nflU8i1YhawRgvR7PafjZ11XAXATXoCQRVmDT5V3RoCIvwQAvD_BwE&gclsrc=aw.ds

 

£27

https://www.ebay.co.uk/i/264559057107?chn=ps&mkevt=1&mkcid=28

 

£20 !

https://www.ebay.co.uk/itm/Thermostatic-shower-mixer-bar-chrome-finish-1-2-includes-offsets/324364614057?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D2%26asc%3D20160908110712%26meid%3Da5c345efdfa543c1847db15ccb2daa63%26pid%3D100677%26rk%3D2%26rkt%3D30%26mehot%3Dnone%26sd%3D264559057107%26itm%3D324364614057%26pmt%3D1%26noa%3D0%26pg%3D2386202%26algv%3DSimplAMLv5PairwiseWeb&_trksid=p2386202.c100677.m4598

Edited January 7, 2021 by Temp

[ProDave]

Yes I would just replace the whole bar mixer unit.  Simple to change.

 

But if you are the tenant, it is the landlords job to fix it.

[Taff]

Cheers guys landlord will be replacing the unit??