Hi all. Firstly I do appreciate I am not GSR yet, still have another 13 jobs to do. My issue is I am losing confidence in the guy that is supposed to be training me.
We serviced a boiler last week at a property. I got to do the service whilst being supervised by him. During the service the customer mentioned they were having to top up their heating pressure nearly every day. He didn't seem that bothered about it, just checking the boiler was safe and then off he went.
I asked them to call me if it was still doing it after the service. It certainly is and so I got a call to go and fault find it.
This morning I isolated the boiler from the flow and return pipework using the isolation valves under the boiler. It's a Remaha Avanta Plus combi boiler by the way.
I topped the system up to 2 bars prior to isolating it to give it a good pressure test whilst we did other jobs that day.
On returning 8 hours later the pressure had dropped to 1.7 bars. This was before I had opened up the valves under the boiler so there must be a leak inside the boiler.
I had a bag around the PRV outside all day. The bag was empty when I checked it on my return.
No signs of leaking when the case was removed on the boiler.
My gas fitter thinks it could be the expansion vessel but why on earth would that cause a pressure drop? I think he is speaking out of his rear.
I think the only possible explanation is a pinhole in the main heat exchanger. A drip running down and through the condensate trap and into the drain outside. We didn't remove the front of the heat exchanger as far as I remember in the service as the co/co2 ratio was fine.
That's how I've been taught by him anyway.
I'm going back there on Friday and my plan is to cut the condensate drain pipe and see if any water is leaking down it with the boiler off. If there is then it has to be a pinholed heat exchanger right? The boiler is around 10 years old as it's been in the house from new.
Thanks all in advance.
We serviced a boiler last week at a property. I got to do the service whilst being supervised by him. During the service the customer mentioned they were having to top up their heating pressure nearly every day. He didn't seem that bothered about it, just checking the boiler was safe and then off he went.
I asked them to call me if it was still doing it after the service. It certainly is and so I got a call to go and fault find it.
This morning I isolated the boiler from the flow and return pipework using the isolation valves under the boiler. It's a Remaha Avanta Plus combi boiler by the way.
I topped the system up to 2 bars prior to isolating it to give it a good pressure test whilst we did other jobs that day.
On returning 8 hours later the pressure had dropped to 1.7 bars. This was before I had opened up the valves under the boiler so there must be a leak inside the boiler.
I had a bag around the PRV outside all day. The bag was empty when I checked it on my return.
No signs of leaking when the case was removed on the boiler.
My gas fitter thinks it could be the expansion vessel but why on earth would that cause a pressure drop? I think he is speaking out of his rear.
I think the only possible explanation is a pinhole in the main heat exchanger. A drip running down and through the condensate trap and into the drain outside. We didn't remove the front of the heat exchanger as far as I remember in the service as the co/co2 ratio was fine.
That's how I've been taught by him anyway.
I'm going back there on Friday and my plan is to cut the condensate drain pipe and see if any water is leaking down it with the boiler off. If there is then it has to be a pinholed heat exchanger right? The boiler is around 10 years old as it's been in the house from new.
Thanks all in advance.
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