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Bump! Any advice or shall I just break it off?

Turns out it just needed a second powerflush :whistle:

Thank you all for your replies. I've got the boiler working with a second powerflush. We had it run through the boiler with each radiator. In the normal flow, we had the boiler on (where it ran on full heat and full flame like a dream) and in reverse, we had the boiler off. As per my previous...

Some beautiful looking work. Turns out the system just needed a second powerflush and now works in a way that we've never experienced since moving in. Every room heats up and the boiler is running constantly on full flame at whatever temperature we set! Thanks. Thanks. We got it working with...

We only had this fitted around a year ago and it's already difficult to remove....just like its predecessor! Any tips on how to get these pesky buggers off without breaking them?

Just had a quick look in the spare parts catalogue and can see that there is no filter for this boiler (637): https://www.vaillant.co.uk/downloads/ecotec-plus-spare-parts-manual-261420.pdf

Can you take a look and see it's it's the big shiny brass/copper thing to the left of the pump or the red knob to the right of the pump, or something else in here:

I think he was a boiler engineer, just used the wrong term

I was looking at this plastic container that protrudes outside of the bottom of the boiler. Is that the one? If so, it has a small layer of blackness at the bottom of the container. I can't see any other filters in the flow or return pipes. Edit: just seen that the plastic container is a...

I'm worried about fitting a gate valve because I want the hot water cylinder to get a good amount of heat when it needs it. The zone valve is working because it switches on and off with the programmer. I think the cylinder thermostat needs replacing because it's doing nothing to cut off the zone...

Just had a look at a video on low loss headers: Is this the same as a hydraulic separator? Would this be useful in my set up where I only have 2 zone valves? Would a bigger pump still be beneficial with a LLH? You mean add more zone valves to separate out parts of the house? Why would this...

It's 250L

I agree that I need a bigger pump. Reading on hydraulic separation, are you suggesting that to help our problems with the hot water circuit being given priority over the heating circuit due to its proximity? Sounds like a good idea if we have multiple zones in the house, but as we only have the...

I agree that it's a lot to process. Hopefully my breakdown has helped make it easier to digest. Yes, the system has worked over the years, albeit not in an ideal fashion (see https://www.diynot.com/diy/threads/overheating-and-cut-off-on-vaillant-ecotec-plus-637.497900/). Two radiators just...

Do the noises indicate any apparent problems like trapped air or pump issues? Drained and re-filled system last night to remove any trapped air but no joy as you can see; even if it's just on hot water to only heat the cylinder which is the closest 'radiator' to the boiler (also tried heating...

Let me first list the set-up we have: Vaillant ecoTec Plus 637 system boiler Zilmet unvented hot water cylinder with external expansion vessel 1 zone valve for Central Heating 1 zone valve for hot water cylinder 1 Grundfos 15-50/60 circulation pump (on flow pipe from boiler) 16 radiators...

Thanks for the reply. We have decided to not go ahead after weighing up the cost/benefit. I have since read up on boiler wiring and understand what is needed to replace the time programmer. I might start a separate thread for further advice if required.

Thanks Mandrab. Turns out all that we needed to do was open the filters at the end of the taps and clean them out.....D'OH! :cry:

Looking for advice on UFH as well as general heating system. We have made the choice to get water underfloor heating in the middle of our refurb works for the kitchen. Rather than placing PVC pipes in plastic castellated floor panels, we will have them routed between joists and on top of...

Hi all. We are having trouble with water pressure from our unvented hot water cylinder tank (a.k.a megaflo/megaflow). Over time, the pressure has reduced so much that we can't get any decent flow rate from the taps in the loft. Ground floor and first floor are very powerful as you can see on the...