I have a old central heating system that has a back boiler ,seperate hot water cylinder and a vented water tank in the loft.
Both my hot water and central heating have packed in.I have a drayton timer switch that powers up ok as it should.If i select either hot water or central heating on it ,the switch lights up as usual and appears to work fine,but nothing else happens.
Anybody any ideas what would cause both the HW and CH to fail? I have located the pump under the floor and gave it a couple of taps as was suggested by a friend of mine but it made no difference.
I suspect it could be either the pump,back boiler or immersion heater in the cylinder at fault.
Any help appreciated to point me in the general direction.
The house is old and the back boiler is situated in the chimney breast behind a gas fire.The gas fire works ok.
Im not sure how to check if the pilot light is on as you cant see the boiler and im not sure how you would light it.
All my previous systems have been combi boilers in previous houses and they were straight forward.
Im pretty sure its the pilot light that is out.Ive tried to light it as per the instructions without success.When i press the grey knob i can hear the gas flow and i can see the spark when i press the igniter button.It doesnt seem to want to light although it is very difficult to see.
Ive held the grey button(gas ) for at least 15 seconds and a lot more.Is this as far as i can go myself or is there anything else i can do?
I have removed the fire facia and can now see the pilot light okay.I can get this to light everytime i try now but as soon as I release the grey gas knob the light goes out. It alwaysd lights straight away but will not stay on.
I followed the instructions and turned the grey gas knob to the right instead of pushing it in and waited 3 minutes but the same problem keeps happening.
THE FAULT IS THE THERMOCOUPLE. i ADVISE THAT YOU GET THE SYSTEM SERVICED. CHECK YOUR HEADER TANK IN THE LOFT TO ENSURE NO BUILD UP OF DEBRIS. ENSURE HEADER TANK HAS BYELAW 30 KIT FITTED. ADVISE GENERAL MAINTENACE EVERY THREE YEARS; DRAIN DOWN ENTIRE SYSTEM AND FLUSH OUT, AND THE TOP UP AND ADD INHIBITOR
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