Heat exchanger! do i need a new one?

This topic has 7 replies, 4 voices, and was last updated 6 years, 2 months ago by Ed P.

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December 14, 2019 at 10:24 am #38845
keith with the teef
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@thinktank
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We have noticed that the hot water is getting colder. I’m not talking about the ambient coming down the pipe.

I put the hot water onto max today and it stayed the same temp as on half power. The funrace went mad when I turned the heat temp to max.

Opinions. Or could it be something else?

Its a worcester 24cdi.
December 14, 2019 at 2:46 pm #38850
isdarit
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@isdarit
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Sounds like heat exchanger. Doubt it’s the diverted valve
December 14, 2019 at 3:14 pm #38851
keith with the teef
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@thinktank
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TY.

I noticed that when having a shower that the water is goodly hot. Could that be because the shower has a small amount of back presure?
December 14, 2019 at 3:24 pm #38852
Wheels-Of-Fire
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@grahamdearsley
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You sure its not an electric shower ?

Not insulting your intelligence honest 😁
December 14, 2019 at 4:55 pm #38854
Ed P
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@edps
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Do a hand check for temperature on the piping when heating the water, it might help you pin down the problem area.
December 14, 2019 at 5:19 pm #38856
keith with the teef
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@thinktank
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Good idea.
December 23, 2019 at 4:08 pm #39091
keith with the teef
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@thinktank
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I’ve ordered a new haet exchanger. Do I have to drain the system or something else? 🙂
December 23, 2019 at 6:52 pm #39093
Ed P
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@edps
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Before you get into serious work, check that the dog or something has not altered your hot water temperature setting or that your circulating water temperature has not been set below your hot water temperature.
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