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F5 = Boiler overheated. Allow to cool and reset. It also sounds like you have a pcb problem F13 or that could be a faulty thermistor causing both problems

its overheating

turn your boiler and town mains off. Then the little header tank that your water was overflowing into, pour the sentinal in there. Then go down stairs and drain about twice the size of the sentinal bottle of water from the radiator, this is to lower the water level and allow the sentinal to...

Yes that should be good as it is mostly used in industrial. Never seen any on a residential installation and they guarantee it for 50 years

have you tried closing the lock shield then cracking it open by 360 degrees ( 1 full turn) this will reduce the return allowing the water to enter the rad quicker than it is leaving. Also is the btu output big enough for your system if you have upgraded the rads to 50-100%

you could have one of many problems. 1. a Leak either on pipework, boiler or radiators. 2. The blow off valve is failing and releasing water 3. Water is passing in the heat exchange from your heating to the water(not good) Have you seen any water or is there any wet patches on carpets...

if it is blue then i might start worrying as it sounds like they have used mdpe pipe. Never seen blue pipe for heating only for towns main.

ps hep20 states that the system would have a life at LEAST of the traditional installation of metal pipe and fittings. It has a safe operating pressure and maximum rating at 7bar of 82C and can operate at 3bar at 114C for a limited period in the event of malfunction of the boiler like chris...

This is an older polypipe fitting which can only go upto 82C and 3bar of pressure so if the blow off valve fails the above picture is the outcome and that is why i recommend hep20

The development in plastic piping has come a long way in the last few years and we use hep2o as it is the only one i would recommend on heating but polypipe has now managed to perfect their fitting so it too will be capable of working at hotter temperatures. If you boiler is running at 80C...

If you decide to channel out your floor for the pipework you will create work and problems that you don't really need. If you have a solid floor then i would recommend what we use in conservatorys although it is not a cheap option, but is very easy to install. Visit www.hepworth.com Or...

isn't copy and paste one of the best ideas if you cannot type :P

Building regs state that all new installations require a fused spur with a 3 amp fuse installed. First check your plug has a 3amp not a 13 amp fuse fitted. When you turned it off did the boiler reset? or do you have the same problem? From the feedback on this site the boiler you have installed...

then go outside and adjust the soil stack because you will be lower than the original entry point on the stack. If you get a basic error like the pipe the wrong way round than I would not like your chances of doing this job. Get a plumber to give you a quote and see what he says with regards to...

If you look around the boiler, you should be able to see a fused spur. A socket with a red light above the switch. Turn that off for 2 minutes and then turn it back on again making sure the pressure is correct.

Hi Claire hope xmas was good news let us know how you are

Having done some sub contracting for british gas I know that the power flush that they do includes a magnaclean and various chemicals to clean and maintain the installation. This adds a cost of an extra £150 and a return call after a week. My price is a standard £450 (unlimited amount of...

Our home was built in 1919, the boiler was originally coal-fired, then converted to oil and then, 16 years ago, converted to natural gas. I think its time for a new boiler :lol:

the problem will be sorted out once and for all if you carry on messing with the boiler. You wont need the heat in a grave. What makes you think you know more than the engineers who do not know the problem. The gas should burn blue not orange except at the tips. Get an engineer out and turn your...

i have serviced loads of these boilers for a large brewery and you can pick up a gas valve for this from any parts centre (part of plumb centre) To be honest this sounds like you have a permanent live feed as it should not fire up when you turn off the fused spur