Yes that I replaced first.
Well i replaced the water pump, I've seen that it has the same problem and then I put my old pump back. I thought that I will get a refund or other part in change. I still have the new pump.
Is it possible to get a new faulty pump? How can I check that?
If the old pump is not working then the water will not circulate and the boiler wil overheat - is the boiler holding pressure now when sat at cold?
When I turn it on, the boilers display was showing 1.2 bar. I have a refill tap in the hotpress with a valve wich refills the sistem automatically if needed. The tap was on and the meter was showing 1.1bar. I turned on the boiler and in a few seconds the temp went to 99 degrees celsius and it stopped and F9 came on again. Bubles in the boiler coud be heard. The pressure inside the boiler went to 2.7 bar. Also the meter up on the hot press went to 2,7 bar and then slowly descend to 1.1 bar in approx 1 min.
And you say it is the same with the new pump?
It didn't make any difference.
Now the air vent from the pump assembly was not puffing anymore.
It sounds like you have air trapped
I just tried to start the boiler again and it shows 1.2 bar 33 degrees celsius and in approx 15 secs it shows F9
Do you have anywhere else you can let any air out - can you try the screw on the front of the pump and see if any comes out of there once it is released
there is some air comming out and after a few secs water comes out. i installed the new pump
I did the above after installing the new pump. I also let some water out from the boilet before installing the new pump. With the pump taken out I turn on the water from the inlet valve and the water came out through the pump assembly.There was black water with black discharge like sand. I let it go out until the water came out clean. i installed the pump reset the overheat thermostat and let it run. It did the same it run for a few secs, then some cracking noise like air in the boiler system, steam comming out from the air vent. I don't know how to check if the new pump is running.
If you take the screw out of the centre completely, you will see the insides spinning if they are
It is not spinning.This is the new pump.
Can you put a small screwdriver in the slot and give it a twist?
I did it spins manualy. It dripps water when you take the screw out.
It doesn't spin when you turn the boiler on.
the pump spins easilly with the srewdriver
When I spin it first anticlockwise, I had a very short thin jet of water and then it only dripps
When you turn on the boiler is there are extra resistance?
Are you able to check power to the pump at the electrical connection block on the pump?
I will get a voltmeter in about an hour and I will respond you then.
No problem - check at the pump, if there is power then the pump is duff
If there is no power, check all the way back to the PCB where the pump gets its power from
If there is no power at the board then check the fuses on the board
If they are fine then it is a PCB fault
I will tell you in approx one hour and a half
No problem - come back when you have checked
I checked on the PCB and when I turn the boiler on it shows me 2.5 with the voltmeter set on 200V~ (alternative)
It shouldn't be 24 volts?
The fuse on the PCB is OK.
So Voltmeter set on 200V AC shows 2.5
Voltmeter set on 200V DC doesn't show anothing (is zero)
I can only set the voltmeter at 250V AC. Please give me 10 minutes to open the front of the boiler again and I will measure it the way you said.
I set the voltmeter on 250V AC and it doesn't show me anything. Being set on 200V AC shows me 2.5
I tried on the PCB. I put the voltmeter on the connection where the wire comes out from PCB
there is only one fuse and is OK
The room thermostat was always on. Still nothing.
I will change it and I will let you know tonorow
Sorry for late reply... I just had the boiler fixed today. It was the PCB... did not power the pump. Anyway, thank you for the great service. You are really pro.