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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Central heating - water boiling
I have a Myson boiler. The water boils, the overflow pipe make a noise
like thunder as hot water overflows into the header tank in the loft with a tremendous gush. The overflow pipe is very hot to touch, and the water in the header tank is hot and steaming. Is this a boiler thermostat problem? The boiler does this after a couple of hours of being on for HW and CH and is up to temperature. When I turn the temperature control on the boiler front panel down to off, it stops. The pump is working. What's the likely cause, and is it a DIY job to fix it? Thanks Kevin |
#2
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Central heating - water boiling
On 1 Mar, 22:29, wrote:
I have a Myson boiler. The water boils, the overflow pipe make a noise like thunder as hot water overflows into the header tank in the loft with a tremendous gush. The overflow pipe is very hot to touch, and the water in the header tank is hot and steaming. Is this a boiler thermostat problem? The boiler does this after a couple of hours of being on for HW and CH and is up to temperature. When I turn the temperature control on the boiler front panel down to off, it stops. The pump is working. What's the likely cause, and is it a DIY job to fix it? Thanks Kevin certainly sound like boiler stat failed pete |
#3
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Central heating - water boiling
On the side of your hot water tank you should find a thermostat held onto
the tank with a spring wire,this is likely to be your problem. |
#4
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Central heating - water boiling
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#5
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Central heating - water boiling
On Thu, 01 Mar 2007 14:29:59 -0800, kevinbecken wrote:
I have a Myson boiler. The water boils, the overflow pipe make a noise like thunder as hot water overflows into the header tank in the loft with a tremendous gush. The overflow pipe is very hot to touch, and the water in the header tank is hot and steaming. Is this a boiler thermostat problem? The boiler does this after a couple of hours of being on for HW and CH and is up to temperature. When I turn the temperature control on the boiler front panel down to off, it stops. The pump is working. What's the likely cause, and is it a DIY job to fix it? Thanks Kevin Is this a boiler with a dial thermostat or simply a high/low switch? Either way the thermostat in the boiler has gone. This model clearly doesn't have any sort of over-heat stat. -- Ed Sirett - Property maintainer and registered gas fitter. The FAQ for uk.diy is at http://www.diyfaq.org.uk Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html Choosing a Boiler FAQ http://www.makewrite.demon.co.uk/BoilerChoice.html Gas Fitting Standards Docs he http://www.makewrite.demon.co.uk/GasFittingStandards |
#6
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Central heating - water boiling
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#7
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Central heating - water boiling
Thanks everyone. I'll check all the things you said, but the likely cause is unanimous. Can anyone recommend a good place to buy a replacement? Cheers Kevin |
#8
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Central heating - water boiling
The thermostat control is a dial. There's a little orange light next
to it that is off when running normally. A couple of times the boiler has shut itself down and the light comes on. The two wires disappear into two tubes and held in place with k clips. Certainly seem very firm in there. |
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