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What is your pressure like on the cold main coming into your house. The pressure relief valve on the hot water side is rated at 10bar so it will take a fair amount of mains pressure to make it drip. I've only ever seen 2 go. If your mains pressure is very high then the best solution would be to...

Are they wired or wireless room stats?

What sort of system have you got? One thought is that if the boiler is firing for frost protection because it's cold and from memory I don't think the pump is wired back to boiler on this model it might be calling for heat but has no circulation as the pump is not going. Or if it's on an s plan...

Just go for a decent wired or wireless programmable room stat rather than the clima or system pro.

Is it not covered under warranty?

Sounds like it might be piped up incorrectly to me.

What happens when the pump sucks the water out faster than the very small cold water store can be replaced by the ball valve???? :roll:

:D

The majority of problems with no display are due to a faulty pcb. On the rare occasion a faulty fan can cause loss of display and on a very very very rare occasion a faulty pressure sensor can cause the same problem. If your unsure disconnect the low voltage wiring harness plugs on the left hand...

Funny that I put my 418 in 3 years ago on a 30 year old system and surprise surprise no noise. System wasn't power flushed it just had fernox cleaner run through it after installation. Biggest problem with noise on this boiler is installers putting it on the wall, filling it up, giving it a...

One thing you could try is going into the d codes on the boiler. If you press the i and + button together. Then use the + button to go up to d88 and if you alter this it will cause a slight delay to the hot water start up.

Sounds like it might be a burner problem. They changed the design a few years ago and can cause dodgy ignition on some boilers. Hopefully if they fit a replacement it will be of the older more reliable design. Also if it is just over 12 months old be careful when they ask if it's been serviced...

It's been a while since I worked on one. It similar to a glowworm but the components are fitted the wrong way round to them. The pressure sensors are the same as vaillant but be careful as the plastic components have a habit of getting a pin hole near the plate connection. On the glowworm...

Basically group service have a computer system that is so dog manure it doesn't work properly. The to make things even better the management are arrogant and choose to ignore it. Hence the reason good experienced engineers are leaving in droves and being replaced by agents that aren't as...

It won't be a problem with the pcb it will be due to a bad connection on the wiring loom. From the thermal fuse on the main heat exchanger the lead connects on the harness near the right hand side of the main heat exchanger. There is also a resistor that tells the boiler what size it is...

Does the green light come on on the receiver? If not try pressing the top button to see if it comes on

How can you say the boiler is safe to use. The reason the boiler is making a farting noise is because stable combustion cannot be achieved. This can be due to various reasons including a badly adjusted gas valve, low working gas pressure at the boiler or even possibly a break in the flue causing...

The best way to get it checked and signed off is to contact your local authority building control. They will be able to send out one of their contractors to check the installation complies with current building and gas regs. It will cost you you but the only way to get a certificate of...

How was the hot water before the replacement pcb? If it was ok then it might be a case of the new pcb not being set up properly.

Why is everyone giving this bloke such a hard time. Yes he installed his own heating system 25 years ago and yes over time it may of contributed to the overall problems but hey how many installers are out there that haven't got a clue how to install a modern boiler properly AND ensure the system...