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Is it a cmbi? or conventional with a cylinder in the airing cupboard?

Is this a 105 instant? If it is then this is the common problem with the diverter valve to prove what i think go and turn the instant off on the hot water thermostat. The water should then run cold for 30 sec then run hot continuously.

Ofcourse to do a proffesional job you could wrap the pipe in air felt opposed to duct tape or overflow pipe. These materials will not prevent pipe sweat in the wall. Air felt will. With regards to how mush to chase, i recommend you wrap your pipe and try them in your channel if its not deep...

THe equation to work out a rad size is: Height of room X Width of room X Lenght of room Divided by 20. This will give you what you need in Kw. If you want to convert Kw to Btu 1kw= 3412 btu.

Nope i know what your problem is. You fitted you own bathroom and i bet you used flexi hoses. The cold will be ok as it is under mains pressure. HOwever, the hot is more than likely under gravity pressure. In short rip out the flexi and put some 15mm copper in place.

If your not sure what i mean read the box does it say what Kw the shower is? Is it a shower in the box or a small unit with 4 pipes off it?

On some boilers they have a water pressure switch that has a rubber diaphram in the unit. I will bet you pound to a penny it is either gone brittle or split. Hence the reason it may work sometimes but not always.

Power shower? What a unit? Or do you mean an electric shower?

NO NO NO NO!!! How many people live in your house? How many bathrooms have you got? 9 times out of 10 24kw is a drop in the ocean. Get yourself a 28kw Baxi Platinum. They are awesome machines. They come with a 5 year guaretee parts and labour. They are a little dearer but hey you get what you...

to be honest there is usually very little you can do. I would concur with the chap that said you should add some sentinel into the system. However, if the heat exchanger is blocked up there is very little you can do. You could try powerflushing but there are no guarantees.

Let me tell just try to clarify what are you trying to achieve? Is the boiler broken? Is the system not working? What is the situation?

Let me just explain the current situation with boilers. Since april last year there was a government drive to fit only efficient appliances, whether it be a washing machine or a boiler. however, where boilers were concerned the most efficient boilers available are condensing boilers. Theses come...

Yep i think i know this one. Cant remember the exact whereabouts on this boiler but there is a manual reset on the boiler a small red button press this in and you should get the boiler back on.

Not a clue either. Did he mean LST low surface temperature radiatior?

Yeah i would concur with that. You see the thermacouple sits in the flame and creates a millivoltage. this then holds the magnet in the gas valve which keeps the gas ways open. If the magnet in the valve has lost its magnetism it wont keep the gasways open.

Is there any debris, lint or dust on the themacouple? DId the themacouple get changed?

Is the flame sitting on the themacouple ok?

Obviously when running any pipe from the boiler you must for the first meter run them in copper. I usually run 22mm flow and returns across the landing and tee off to rads in 15mm. Never go under 15mm it causes no end of problems. If money is a problem don't use plastic. It is expensive and i...

3 things cause that problem. Either a blocked cold feed, the vent pipe doesn't go 18 inch (450,,) over the tank or the pump is set to high. Firstly check your pump. if it is set too high turn it down. If this seems normal open a radiator vent and if it fails to thrash water out at you, you...

First of all you need to determine what is causing this 'whistle'. Usually those sorts of noises are caused by the fan ceasing. However, if it is the system which is causing the noise yes it may pay to put some sort of inhibitor into the system. Don't feel daft for asking how you administer it...