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You can pick up brand new pcb's for around £60 on ebay. Pay for an engineer to install it for around £50.

Sorry- I didn't mean to sound big headed or indeed arrogant. Just really making the point that I didn't get any further leaks and thought that I would share this with the forum members. However, I concede that you are right, this doesn't necessarily mean that all expansion vessel problems can...

An update and two years on! The boiler is still going strong and there have been no problems with the PRV leaking or pressue fluctuations. I guess the expansion vessel wasn't leaking after all. I'll get it changed to a condensing boiler for efficiency savings next year but the boiler is...

On a really cold (sub-zero) day; we normally set the thermostat to around 23 degrees. This is turned down to 20 degrees overnight though.

We tend to set the thermostat to 22 degrees celsius during the day and then turn down to 18 degrees during the night.

Our central heating is on 24/7 and we average about 5 units a day. Our boiler is a Ferroli Falcon combi-bolier and we have eight radiators covering a three storey terrace house. You also need to check if the units are imperial or metric as we might not be comparing like for like (check the...

Hi, Try the reset switch first (left hand side of the boiler) and then ensure the central heating is turned on. Check to see if you can hear the pump spinning. The operating manual includes full instructions for trouble shooting. The boiler should still be under warranty (two years)...

The system pressure when cold is 1.3 bar (not 1 bar as previously stated and the MI recommend 1 to 1.5bar). With the central heating turned on the pressure rises to 1.8bar and the MI confirms that this is within acceptable operating tolerance (pressure rise of approximately 0.5bar). The Fer...

I'll keep an eye on the expansion vessel pressure and if it fails again, I'll fit an external one as suggested.

Ferroli Falcon 2 (aka Fer Falcon) and was fitted three years ago. The PRV only started leaking when I was topping up the system and didn't shut off the tap properly. The filling loop is disconnected from the system as water bye-laws. There was no water leaking from the schraeder valve and...

It has been working for over a week now and still no leakage from the PRV overflow pipe. Why do you think the diaphragm has been permanently damaged? Surely, after a week, I would be seeing the tell tale symptoms by now.

Just to say a big thank you to this forum. The PRV on my boiler was dripping and the boiler pressure would rise to 3 bar when the heating was on. I searched through the forum and discovered that my expansion vessel may also be the problem. The expansion vessel was pumped back up to the...

My Ferroli Falcon boiler does the same thing. According to the user manual, this is entirely normal and when in summer mode the pump is turned on occasionally to make sure everything works.