Recent content by Seb1961

I thought my troubles were over, but now I get this: When I run the DHW only, the boiler runs for about half an hour and then shuts down. This may seem to indicate that the water in the cylinder has reached its temperature, but the zone valve does NOT shut. The pump runs for another minute or...

Thanks Bunnyman. Boiler pressure gauge was showing pressure of 0.0 before I checked the pressure on the EV. I'm not sure whether the cylinder is mains fed or from a tank. We do have one in the loft. I had never heard of the main heat exchanger leaking down the condense pipe. We have...

Sorry, Mick, got your name wrong.

Mike, yes it's the charge in the expansion vessel. I used a a digital tyre prssure gauge. Are these not reliable?

I really don't wish to pretend to have infinite wisdom. I checked it just now. No water is leaking from the valve, and the pressure is 0.9 bar which I believe is as it should be. Also checked the swan neck again into which the PRV copper waste pipe goes. It had a lot of bone dry black...

Thanks, flameport. Seb: I checked the PRV, and the waste pipe is completely dry, so no water has been discharged. flameport: That isn't conclusive - the water coming out of there will be very hot, so would eveporate away quickly. Put a plastic bag over the end and run the heating, if water...

Hi, I have a Vaillant EcoTech 624 system boiler, around 7 years old. Last week after having the boiler serviced (which inluded re-pressurising the expansion vessel), and when we first starting using the CH again after the summer and first cold weather, the CH worked OK for a day or two...

Apologies, this was posted in the wrong place. Hi, I have a Vaillant EcoTech 624 system boiler, around 7 years old. Last week after having the boiler serviced (which inluded re-pressurising the expansion vessel), and when we first starting using the CH again after the summer and first...

After writing my latest post I decided to double check if there is any air in the radiators and found that in two or three there was some. Previously I had been hearing some gurgling sounds in the rads when the system was running. Could air in the system explain the fluctuations in pressure...

Hi, Thanks for the replies. I'm aware that there is expansion when the CH/HW is running, but perhaps I wasn't very clear in describing what was happening. When I switched the system on, the pressure went up to 2.7, then came down (system still running) to 1.1/1.2 where it stayed for an...

Thanks to everyone who replied to my previous post earlier this week. I have been having problems with the pressure on my Vailant ecotec 624. It was going right up to 2.7 and then, when switched off it came right down to 0.4 and needed topping up. Since then the EV has been repressurised a...

I can't hear any water running away. I don't have an external drain for it. And Popeye, wouldn't the engineer have spotted a faulty expansion vessel? He re-pressurised it and would have noticed water coming out, no? How much would it cost to replace an expansion vessel on a Vaillant if...

I have a pressure problem with my four year old Vaillant ecotech plus 624 system boiler. I've just had an engineer round who re-pressurised the expansion vessel. When I switched the boiler on for heating and hot water in the afternoon  after he left the pressure went right up to 2.8 bar...