Hi,

The above boiler was fitted in my house when I moved in. The problem was that the hot water temperature adjuster had been snapped of the PCB by the previous owners or someone they had paid to "fix" it. This meant that the heating worked fine but the hot water would only run for a 30 seconds before running cold.

Yesterday I replaced the PCB and expected this to solve the problem but still only the heating is working. There seems to be another problem. I can only assume that since I now know that the temperature selection is OK that there must be something wrong with the signal that tells the unit that the hot tap is drawing from the boiler and to therefore heat the water. The water temperature guage is always sitting on the very minimum.

I have read the the diaphragm may be damaged but reading my service manual it seems that there are two (domestic and flow). Which one of these should I replace and also is there anything else that I should consider in this problem?

Thanks in advance for any repsonses.

Ritchie, February 2008

you need a T0019 service kit! £20 to change the lot

Mr C, March 2008

apparantly if you drop the cover on the rhs remove the wire and unscrew the thermistor then clean the end and it will be ok

hope that helps

steve

Steve knight rider, March 2008

Domestic diaphragm operates the hot water micro switch.

Flue venturi can get dirty causing air switch to cut out & domestic hot water temperature cycling. You can change the diaphragm yourself (microswitch can also fail), but the venturi (though quite an easy job) is best left to a gas man (to comply with legislation).

Clean all remnants of the old diaphragm from casing/pusher plate if you dont want to do the job again in six months.

I think theres an eclipse/excel service kit with the diaphragms etc in on ebay at the moment.

Google and you shall find.

c, February 2008