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Alser

Worcester Green star 37cdi Pressure loss.

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Geoff1946
2 hours ago, Alser said:

Just worked out how to quote, dah!  forgot how to.

Isolating valves was mentioned way back at start of topic, just wasn't sure exactly whether I should shut off all 4, have mobility issues and struggled to get under and shut all 4 off but managed okay.

I'm assuming I now wait to see if pressure drops over a period of time? and if stays at same pressure, it is not a boiler leak issue?

If the gauge is on the boiler, (which is the normal arrangement), then it's monitoring the pressure in the boiler and if it still falls with the isolator valves shut then that's where your problem is; i.e. within the boiler. 

If, as you said earlier, there is water inside your heat exchanger casing, and going down the condensate drain, then there is little doubt in my mind that's where your problem lies.

Note the other post, recently, which talked of a leaking plastic coupling to the HE. Yours just might have been disturbed by the guy who fitted a new pressure vessel, and could be a simple fix.

 

CONVERSELY, if the pressure of the isolated boiler holds up OK, then open the isolators to the heating circuit, (the larger 22mm pipes), and if the pressure THEN falls it must be via your pipework.

 

The other valves, (almost certainly 15mm), are not really relevant to your issue, being the gas supply, the mains water input, and the hot water out.

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Alser

So Folks,  the latest update!,  pretty sure you will have had your fill of this topic but here goes;

 

I phone same company this morning, explain the issue,  guy sends the same  engineer out again.  Pressure is at zero.   Pressures it up to1\12.   I mention to him Geoff's suggestion regarding the possible split in the plastic fitting and he says it is fine. He then takes the condensate trap out, takes pipe off and a good amount of water runs off, perhaps a litre or two.

He then blows through the pipe and says it was blocked and he's cleared it, he's now 100% sure that was the issue. 

      Powers up boiler and!  Happy Days!!  Heating and Hot water again.    I check boiler 10 mins later and notice a constant drip coming from somewhere inside. I get myself underneath and notice that he has not refitted the hose retaining clip correctly to the trap.

Anyway, managed to fix myself and so far so good, fingers crossed.

 

Still watching out for pressure drop though and possible pipework issue.

 

So really mean it folks, A big shout out to everyone who has taken time out to reply to this post and I hope that it will be of benefit to others in the future.

 

    Thanks again.

 

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Sharpend

Thanks for feedback, although I’m not sure how a blocked pipe leads to pressure loss? But here’s hoping. 

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Bruspark

Blocked condensate drain normally raises an alarm but un-blocking it is never a bad thing.   

There is no mechanism I can think of where a blocked drain leads to pressure loss . . If it happens again I'd ask them to send a heating engineer next time  . .

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Murdoch

The MIL's boiler often stops working during very cold weather - the fix is to poor hot water over the condensate pipe outside - once the ice has gone the boiler will operate properly again

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Alser

Hi again,  Situation is that Im having to have boiler on two or three times daily only, enough time to get showered and get some heat in the house for a while at least,

 I am aware that boiler is goosed, heat exchanger fault, ( hot water flowing down condesate pipe when boiler is on) and also a possible under floor pipe leak,  boiler needs to be re-pressurised after around 30 min.

Just trying to coax boiler through another few months until funds allow for a new boiler but at least Ive got heat and hot water for a time,

 

        Cheers

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Geoff1946

Glad to hear that you at least know where you stand now.  For what it's worth I doubt if you will have a second leak in your system, as that would be REALLY bad luck. However, when you are having the boiler changed a competent plumber can pressure test your system to put your mind at rest. Depending on condition, flushing might be a good idea too as would fitting a magnetic trap to protect your new boiler.

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Sharpend

 Competent being the word. 

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