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Post and beam

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About Post and beam

  • Birthday 09/30/1959

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    North Hertfordshire

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  1. No. To be honest i think the boiler that it replaced 3 years ago, at 34 years old, heated the house better than this one. But until we build our new house this is what we have and it has the issues described.
  2. Currently 76, was 82 through the winter because its a 1986 house.
  3. Not sure if 'after' is the condition we experience. Most obvious and annoying is when we turn on the shower. It also happens when we open any hot tap in the house. The water remains cold. So ' after using DHW constantly' does not fit our experience. Remember this is only every few weeks it might happen, it is not an everyday or every occasion condition. I do not know what the actual flow temperature out of the tap is. i will measure it. It is set for 55 degrees.
  4. I have very definitely stated that it is blocking code 2965. And it does clear after about 4-5 minutes. There has never been an actual 'error' code on this boiler that would require a manual reset.
  5. I doubt i would ever be aware of it, dont even know how i could be aware of it. If the radiators were not receiving hot water for 4 minutes the effect would most likely be undetectable.
  6. As an untrained punter( and, the customer ) this is my view. I repeat what i said previously. The boiler documentation says it can heat to 82 degrees if required. It should be able to give hot water for bathing in parallel.
  7. No its 15mm. But the PID algorithm controls the physics. My contention is that if the boiler cannot do what i need it to then it is deficient. I am not after all asking it to do anything odd. Specifically, heat a 1986 vintage 3 bed semi and deliver hot water when asked. The boiler manual does say that in older houses it might be necessary to set the temp to as much as 82 degrees C. There by recognising the need. It does not say ' but we wont always be able to give you hot bathing water if you do'
  8. Not to me. The engineers can see them. The previous engineer in january denied that they are time stamped, which i find unbelievable. Mondays engineer said that error codes and blocking codes are time stamped but that it is ' days since last reset' in some format. so not easy to decipher. Probably why the january engineer said what he did. By the way the boiler is a Greenstar 4000 rated at 25kw. Mondays engineer did say that when it fires up it will be at a % of max that makes the modulation very difficult when engaged water is low. Low as far as the boiler wants to see anyway.
  9. With respect i disagree. The boiler should be able to deliver the needs of my house and its occupants. In fact the engineer agreed and said that we should not have to bend to the will of the boiler. If the house is warm enough by the criteria we set that that is how the house operates. Stone cold showers every now and again are not part of my expectations.
  10. Yes, basically. It appears the boiler overshoots its upper limits and goes into a blocking mode for perhaps 5 minutes. My thoughts are that this is a failure of the P.I.D algorithm not being very sophisictaed, well not sophisictaed enough. The code is very specific '2965' to be precise.
  11. This is a traditional 1986 house with a gas boiler and radiators.
  12. I agree which is why i made the comment about software engineers. Little point in me demanding a replacement boiler under the warranty. But i will use this to try to get some kind of software update. However, i think we are on their latest and if they dont have a better algorithm then i am screwed until/unless they do.
  13. Knowledgeable Worcester engineer visited this morning. Nothing to do with cross bleed via the mixers ( didn't believe it was) and apparently nothing to do with flow switch ( i thought it likely was). Basically it comes down to the PID control of the heater when water temperature is falling just below the set point from an already high winter set point temperature. It does not appear to be able to modulate enough to prevent overshoot of the target. A greater engaged water volume in the radiators would allow the excess temperature to have somewhere to go. Upshot is a high temp 'blocking code' that needs about 3-4 minutes before it will allow any more heat to be produced. Bloody software engineers.
  14. I do have a reported crossover bleed issue. Have you watched the video? I cannot see how a bleed over can reduce the boilers sensed temperature down to the same as what comes in directly off the street. And, why that low temperature does not induce the boiler to fire up. This makes no sense to me. I can imagine the possibility of an affect on the shower supply temperature via a bleed over to a lower than desired delivery temperature. But the onserved scenario i cannot imagine.
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