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I have attached a couple of photos showing the dirt on the wall. Would a 1:1 ratio of household bleach and water, along with a light jet wash be OK to use in trying to clean the dirt off the wall?

Thanks @kp00110 Is there any solution I could look to initially spray on before using a jet wash?

I had a new 20m retaining wall built last year in my garden. The face of the wall was coated with a light grey colour of Premium Bio Silicone Render. Due to splashback of rain water from the patio and general dirt, parts of the wall are dirty with dirt stains. I tried scrubbing the dirt off with...

I just noticed on the UFH manifold pump (see attached) that the green light is displayed on the first light which has the symbol of a 'radiator'. The second light, which is not lit, appears to show the symbol of an UFH system. Should the pump setting be on the 'UFH' symbol instead of the...

no problem @JonathanM. Am I experiencing this problem because I have a Vailllant boiler or would I have the same issue regardless of the boiler make/type? I am happy to change the boiler to either a Vaillant ecoTEC plus 637 (recommended by an engineer) or an alternative boiler if gets round the...

thanks @JonathanM. I would like to give your suggestion a go by changing the d.17 setting. However, since I do not have a d.17 status on my boiler, I need to scroll through to d.97 as you mention. If I scroll to d.97, you mention about a password. I am not clear on what you mean by this...

Thanks everyone. I have a system boiler and does not have a d.17 setting. @jeff the gasman - I have a 1970s 4-bed detached house with 3 living rooms plus the orangery (which is heated through UFH). The house is brick construction. Ceiling height is 2.3m with large, double glazed UPVC windows...

thanks @jeff the gasman. The boiler is currently set to a maximum heat output of 20kW (by setting d.00 on the boiler to 20). Even with this setting, the boiler is continuously cycling when only the UFH is on. If the boiler is 'down rated' any further, will this not be insufficient to cater for...

Apologies if this has already been answered before but I recently had installed a wet Underfloor Heating (UFH) system to a newly built orangery 6m x 4m). The rest of the house is a wet central heating (CH) system containing 21 radiators. I have a Vaillant ecoTec Plus 438 condensing boiler...

@Johntheo5 - photo attached showing pipes from expansion vessel

Thanks @Johntheo5. I will try to answer some of your queries on the attached tomorrow where I can. My boiler is covered by British Gas and they carried out an annual service on 26/9/22 which included cleaning out the magnacleen. From the attached, I’m 99% certain that the boiler flow pipe is...

@Johntheo5 - I have attached some photos. - 2 photos showing the boiler in the garage and the expansion vessel gauge - hot water zone valve (labelled in yellow with the number 1). Within this photo, the 2 white pipes at the front are coming from the UFH manaifold - zones valves - the one...

thanks @Johntheo5 but before I turned on the UFH, the boiler was not cycling through S2 --> S4 --> S7, and the boiler happily stayed at S4. Has, by turning on the UFH, caused some poor circulation within the Grundfos pump/CH system? I am now really baffled :(. I have now turned off the CH...

thanks @Johntheo5. I now have just the CH running but the boiler is continuing to cycle from S2 --> S4 --> S7 at 7kw When the boiler shows S4, d.40 rapidly goes up to 67 before S7 kicks in. d.41 stays at 37 What has changed? Before when only the CH was ON, the boiler was staying at s.4 and...

@Johntheo5 - I have turned off the UFH as I am concerned I might be causing damage to it. The UFH pump is on but is cold too. I have attached some photos of the UFH while the UFH system was on

@Johntheo5 - the zone valve for the UFH is open so don't understand why the UFH is not turning on unless when the engineer power flushed the boiler pipes, this has an effect

So after about 15 mins with both CH and UFH on, I have been by the boiler and it keeps going from S.2 to S.4 to S.7 which is not what it was doing before when just the CH was on. D.40 rapidly climbs to 68 when the boiler is firing and d.41 is 38 when S.7 kicks in and the boiler stops. Both...

Ok @Johntheo5. Stupid question but where to I take the readings from for the UFH flow rates?

oh, @Johntheo5, I turned everything off as the house was getting too hot . Shall I turn back on the heating with d.00 at 7kW and then also turn on the UFH? Do you want me to note down d40 & d.41 after a period of time?

@Johntheo5 - the minimum I can knock it back to is 7kw. After 10 mins, readings were d.40 = 62, d.41 = 45 Attached are some photos of the labels shown on the boiler; one of them shows that it is a Vaillant ecoTEC plus 438 along with its serial number. The furthest rads are still struggling to...