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Worcester hiflo boiler the water heating system is also heating the central heating system without being selected

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It turned out to be a filter blocked by inhibiter

Posted on Sep 06, 2008

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Posted on Jan 02, 2017

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Worcester 24i boiler..how do i re-ignite the pilot light??


Overheat thermostat has tripped. If a modern Worcester need to press reset on control panel.

If older style Worcester - Pull front cover off the boiler (just above control panel flap pull the cover from both sides forward to unclip and then lift upwards to remove cover) and you will see a little brown reset button - press this back down.
However the over heat thermostat trips for a reason - was the system running on low pressure? It could be the pump is sticking a bit (dirt in the system) which can be sorted easily by adding an additive (DIY packs available at Home-base) . Or it could be the pump has completely gone. If this is the case it will trip again as soon as the boiler clicks back on.

Apr 27, 2011 | Heating & Cooling

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Need to know how to switch off hot water by combi boiler worcester bosch 240 to be able to fix leak on pipe downstairs


its the vavle 3 one in from the left its a 15mm pipe and there will be a iso vavle what you can turn with a flat point screwdriver and that will turn off the main water to the boiler these are the manual
http://www.worcester-bosch.co.uk/homeowner/literature/discontinued-boiler-literature/discontinued-gas-boiler-literature/240-bf-discontinued-december-1997-literature

Jan 23, 2011 | Heating & Cooling

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We have a Worcester Bosch Highflow 400 (10 year old) combi boiler. Over the last few weeks when we have put on the heating the boiler kicks in and fires up and the heating comes on (the water comes on fine...


The by pass pipe may be limed up. This apparently causes a reduced flow which will stop the heating side of the thing working. Call out Worcester Bosch engineer. It costs £210 including VAT and most parts and they almost guarantee to get it working.

Nov 06, 2009 | Ruud Matching Split Air Conditioner

1 Answer

We seem to have developed a problem with our boiler, worcester 20/25 heatsave. Every time we turn on a hot water tap, when we turn the tap off, there apears to be a loud noise from the boiler or pipes for...


it seams the valve that senses water flow is not operating properly,causing the boiler to keep heating the water when it has nowhere to go,i,e the taps turned off,thus boiling the water.

Jan 12, 2009 | Heating & Cooling

1 Answer

Central heating system boiling


more information required but if the boiler supplies the domestic hot water cylinder then the stat on the cylinder may be bringing on the boiler also the boiler stat may be up too high try turning it down.

Jan 05, 2009 | Heating & Cooling

1 Answer

Bosch greenstar 30 CDi - no central heating or hot water!


it sounds like the system was not cleaned properly when the new boiler was fitted. all new boilers need to have the pipework flushed to remove any debris scale sludge and flux from the system. this is now usually done by a power flush which is basically a big pump mounted on a big bucket and it washes the dirt out of the pipework and collects in the bucket. if this is not done the dirt will block up the small passages in the heat exchanger. i suggest the system is cleaned flush and the heat exchanger changed to help protect the boiler a filter should be fitted (for example a magna clean) if the company who installed the boiler is corgi registered then they are liable for the damages. call corgi for advice.

Jan 04, 2009 | Heating & Cooling

1 Answer

Domestic heating system


Contacted supplier and they have arranged a visit.
Thanks

Sep 14, 2008 | Heating & Cooling

1 Answer

My Worcester Bosch 35cdi boiler is flashing temp then backwards t forwards t, whats wrong with it.?


35 cdi worcester combi about 3 years old,heating not working,hot water works fine.It's been serviced not long ago.Room stat turned up and trv's ,but boiler want fire up,there's power to the boiler and the room stat the built in time clock is switched to on, but still nothing. do you think it could be the diverter valve, when i got there it was flashing SE which mean's it needs a service,cleaned the heat exchanger and burner with the proper worceter brush etc then re set boiler with technical, they also said it could be the built in clock and told me to disconect it, and just use the heating stat to control it.It still want fire.

Sep 03, 2008 | Heating & Cooling

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My central heating system comprises a worcester bosch system boiler and honeywell smartfit controls. The problem I am having is that the central heating doesn't seem to knock off at the preset temperature...


You could possibly have an ignition problem. The controller will go into a lock-out condition if flame is not established. Turning the temperature control down and then back up may be serving to reset the control system so it tries again.

May 21, 2008 | Honeywell Heating & Cooling

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