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Need free Worcester Highflow 3.5 user manual

Where can I download a free Worcester Highflow 3.5 bf HW/CH boiler user manual (one which shows how to set the on/off programme clock)?

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  • Anonymous Mar 28, 2014

    pilot light



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Thanks for that mike, it is a worcester bosch combi 24cdi heating and water can stay on for an hour then everything goes off and the red light flashes. it will come straight back on when reset, but then...

Check the pressure reading, should be about 1 bar when system is cold. Various models in the range of 24cdi. If you do not have a manual, go to,
Get the manual for your unit, to wards the end of install manual it has a fault finder, Also has a basic 1 in the user manual. Number of flashes how fast the light flashes which one flashing can all mean different, So get the manual and check, Some parts are easy to fix, as long as you do not touch the gas side the rest is plumbing. Come back if needed.

Mar 05, 2013 | Water Heaters

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sounds like your not getting gas...maybe a vapor lock,,,,,,,make sure you are compressing the pilot button all the way.....try to listen and see if you hear gas flowing....

Jan 19, 2013 | Bosch Worcester Spark Electrode...

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Boiler Programmer user manual

contat worcester bosch they will be happy to send you a manual as you already have there product installed.

Dec 11, 2012 | Water Heaters

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I have a worcester 28cdi combi boiler. The pressure keeps going up yo 3 bar when the heating is on, and venting of via the pressure valve. When the boiler cools down the pressure drops to zero, and I have...

Your boiler has an expansion vessel that is like a bladder full of air. Yours has lost it's air pressure. Check your manual for this vessel and where the valve is to re-inflate it and what pressure to inflate to. It should have a simple tyre valve, pump it back up (usually to about 1 bar after releasing the water pressure) and should be all fixed. If you can't re-inflate the bladder is holed and the expansion vessel will need replacing.

Dec 05, 2010 | Water Heaters

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I inherited a Worcester Highflow 3.5 GC 41-311-39. The motor for the diverter has failed, so I can only get hot water by turning on the tap, then switching on the hot water on the boiler and heling the...

It may well be a honey well which you can just change the motor . The top cover should come off 1 screw holding it and lift off you should see the motor there . Most plumbing and heating shops will stock replacement motors .

Apr 19, 2017 | Bosch Water Heaters

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Worcester Bosch Highflow 400 Boiler - no hot water or heating

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Although we don't currently offer live technical support online, our Technical Support department will be able to help. Their number is 0844 892 3366 - they're open 6 days a week and on average answer calls within 20 second. If you want to know more about our Technical Support department visit our website

We look forward to helping you

May 13, 2010 | Bosch Water Heaters

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Worcester combi gas boiler 3.5 highflow is constantantly dripping water at the external flue position over flow pipe

water vapour is one the main products of combustion of gas. With a standard efficiency boiler, upon initial heat up when the flue is cold this vapour can condensate on the inner wall of the flue but should stop once the flue heats up, to stop this condense dripping back on to the heat exchanger the flue should be tilted towards the outlet and thus on initial heat up water can drip from the flue. with high efficiency (condensing) boilers, condensation will occur in the flue and secondary heat exchanger during normal operation, dispense of this condensate is accommodated for in the boiler and therefor the flue should be tilted towards the boiler, if not the flue will drip constantly.

Apr 06, 2010 | Water Heaters

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