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Ask The Trades › DIY Forum › Plumbing Questions › 1st. Floor hot water is cold?

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1st. Floor hot water is cold? (Read 2802 times)

jaggiethistle GDPR opt-out	1st. Floor hot water is cold? Jan 21^st, 2010, 9:42am Hi all. I have a Potterton Performer 28 Combi boiler fitted in the kitchen. Over the past week i (and the missus!) have noticed a gradual drop in temperature of the upstairs hot tap water. It's now at the point of being luke warm. All radiators and other taps are fine throughout the house! Any ideas??
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thescruff Global Moderator Trade Member Author Offline Who said plumbing was easy. Posts: 6037 Total Thanks: 147 For This Post: 0 Gender: Trade: Plumber	Re: 1st. Floor hot water is cold? Reply #1 - Jan 21^st, 2010, 7:16pm Could the pressure be higher, try opening the tap less than usual. Are they mixer taps that are maybe stopping the hot.
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CWatters Super Member Offline "Daddy fick it" says James Posts: 5150 Total Thanks: 58 For This Post: 0 Gender:	Re: 1st. Floor hot water is cold? Reply #2 - Jan 22^nd, 2010, 7:59am Faulty shower mixer? eg letting cold through to the hot pipe and around to the tap?
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jaggiethistle

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Re: 1st. Floor hot water is cold?
Reply #3 - Jan 22^nd, 2010, 12:43pm

Thanx for the reply folks!
My water pressure is sitting at a constant 2.0 Bar when the heating is on. Is this ok?
I do have mixer taps fitted to the bath and h/w basin. But is it likely that both of these would pick up a fault at the same time? and can you service them?

I also have a mains fed mixer shower. I've isolated the cold supply this morning to the shower and turned the lever to full hot and it's still luke warm with just a moments rise in temp before settling back down to cold(ish) Huh

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thescruff Global Moderator Trade Member Author Offline Who said plumbing was easy. Posts: 6037 Total Thanks: 147 For This Post: 0 Gender: Trade: Plumber	Re: 1st. Floor hot water is cold? Reply #4 - Jan 23^rd, 2010, 12:20pm The gauge on the boiler is system pressure and not the mains pressure, and 2bar when hot is ok. Try turn the cold to the bath off and running the hot, at the same time measure the flow rate into a bucket, it should be 10-12Ltrs/m
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CWatters Super Member Offline "Daddy fick it" says James Posts: 5150 Total Thanks: 58 For This Post: 0 Gender:	Re: 1st. Floor hot water is cold? Reply #5 - Jan 25^th, 2010, 10:25am When you turn on the problem tap does the combi fire up normally or do anything different to what it does when running a working tap ?
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Ask The Trades › DIY Forum › Plumbing Questions › 1st. Floor hot water is cold?