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Ask The Trades › DIY Forum › Plumbing Questions › water going from hot to not so hot

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water going from hot to not so hot (Read 3668 times)

herby

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water going from hot to not so hot
May 26^th, 2008, 10:20pm

Hi everyone just new at this and i wonder can anyone please help me.I have a baxi 105e and had a plumber out fixing it i had a hot water led light flashing and he replaced the switch which it solved., but when i turn the hot water on to get a shower the hot water only stays on for a while and then goes cold not really cold but not as warm as it should be i have the temp switch turned up but there must be another fault. Please can anyone help Cry

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lovejoy GDPR opt-out	Re: water going from hot to not so hot Reply #1 - May 27^th, 2008, 6:14am look at the boiler while the shower or a tap runs / err try both dose it light and go to full flame then got to minimum flame or go out without a flame faliure light flashing ?
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herby

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Re: water going from hot to not so hot
Reply #2 - May 27^th, 2008, 6:59pm

When the water is turned on the flame light comes on and the boiler fires up, when i lower the pressure of the tap the flame still on but lower. The plumber tried this he also had them both running the shower and the tap but still the water is not that hot. Before you couldn't touch the water because it was so warm.

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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: water going from hot to not so hot Reply #3 - May 27^th, 2008, 8:46pm Whats the temperature like at the kitchen sink and basin, it sounds more like a shower problem to me. Is the rose clean (the little holes)
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herby GDPR opt-out Total Thanks: 147 For This Post: 0	Re: water going from hot to not so hot Reply #4 - May 27^th, 2008, 10:42pm The water at the sink starts of really warm then goes lukewarm its the same in the shower and sink.
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herby GDPR opt-out Total Thanks: 147 For This Post: 0	Re: water going from hot to not so hot Reply #5 - May 27^th, 2008, 10:50pm There must be a similar fault in these Baxie 105 this only started to happen when my hot water led light started to flash. the plumber replaced the switch and cured this fault but the hot water was never as warm. Could it be a build up of limescale in the dhw heat exchanger.
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lovejoy GDPR opt-out Total Thanks: 147 For This Post: 0	Re: water going from hot to not so hot Reply #6 - May 28^th, 2008, 1:00pm it could be that or the ntc sensor try changing that first is the cheapest option
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herby

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Re: water going from hot to not so hot
Reply #7 - May 28^th, 2008, 7:04pm

Cheers lovejoy i will try this and let you know. Is this the only 2 things that it could be??? and if it is the heat exchanger could anyone tell me how much it would cost me to get it fitted labour as well cheers. I have a Baxie combi 105e instant. It not the ntc senor because the plumber replaced that so it must be the heat exchanger.

« Last Edit: May 28^th, 2008, 10:27pm by herby »

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lovejoy GDPR opt-out Total Thanks: 147 For This Post: 0	Re: water going from hot to not so hot Reply #8 - May 29^th, 2008, 10:38am yes sounds like it will be 1 of the 2 heat ex is around £60 cannot comment on labour charge as of course areas differ
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herby GDPR opt-out Total Thanks: 147 For This Post: 0	Re: water going from hot to not so hot Reply #9 - May 29^th, 2008, 10:27pm Cheers to everyone who has replied to my questions much appreciated.
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