Fix Fault Worcester 28si

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We have 65 questions about fixing 'worcester 28si'

which way do I turn the pressure valve please?

I would very grateful if somebody could answer what must seem like a dumb question. I have a Worcester 28si Combi Boiler and the pressure is holding between 3 and 4. I have bled very rad and think I ... more


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boiler works for a short period?

i have a worcester 28si mark 2 it fires up on hot water or central heating and works fine for a while then cuts out it tries to reignite but no joy then it will not reignite for about another half hou ... more


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Instruction Booklet for Worcester 28Si Mk 2 boiler?

Can anybody help? I need an instruction booklet/leaflet for my Worcester 28Si Mart 2 boilers. Mine has disappeared!! Regards Liz


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how can i fix my worcester 28si?

due to building work, i have disconected the radiators on my system. my boiler now keeps overheating, and cuting out. is this because of no pressure in the heating side?


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worcester 28si?

Ignition is sparking,no gas coming thro gas valve,can i adjust start sequance, then on to run full flame,by a adjusting valve.


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How can I fix my Worcester 28si?

I ordered a new PCB board for my boiler, everthing fitted back of apart from the code plug does not fit the new board. My question is what does the code plug cotrol? If I order with the part number fr ... more


how to check the pump on a worcester 28si boiler?

i want to know if the pumps going on my boiler. the ch is still working and hot water still working but wont work together...fault lights flashes fast when we have the heating on...any ideas..mick


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what should i do ?

my boileris making a thumping noise when lit it is a worcester 28si make 2


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Worcester 28SI 11?

Hi, anyone know how to boost the pressure on one of these boilers, ours is showing 0.5 bar plz text me on 07983 766 853 cheers


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worcester 28si boiler loses pressure ?

My worcester 28si boiler loses pressure when the heating is on and off seems to lose it slowly continuously can see no leaks on system


flashing light on worcester 28si ii combi boiler?

My worchester 28si ii boiler red warning light keeps flashing . I have held button in and boiler works again , but this is happening twice a day . Pressure isnot low have checked that . Could problem ... more


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Sunvic Select 107 Problem, Help Please?

I have a Worcester Bosch Boiler 28Si, with a Sunvic Select 107. The boiler produces hot water ok, but when the central heater is on the Sunvic select 107 switches on and off rapidly, attempting to swi ... more


does my combi boiler have an economy mode ?

i have a worcester 28si mk ii do i have a dial where i can put it on economy


How can i fix my worcester 28si boiler?

I need help getting the hot water to work.it was working but now the water tap light is flashing and there is nothing i can see wrong.ie pressure valve at 2.5 Can anyone help me.


worceter 28si II?

no hot water or heating red light flashing reset no change 28si 11 worcester


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worcester 28Si?

I have a flashing 'on' red light where I usually have a solid light??? No Heating any suggestions


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worcester 28si ii, heating not working but hot water still works?

How can i fix this problem


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no hot water?

central heating ok, no hot water on demand. how do you test turbine? 5 vaults registering, should be3.Worcester 28si


Advice on possible reasons for Combi Boiler problem?

I have a Worcester Bosch 28si Junior Combi Boiler, (3 years old). No problems until very recently when having a shower at night, through mixer tap on bath, hot water running cold for periods before re ... more


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Worcester 28Si II problem?

Since a burst pipe in my house, when I turn my boiler on, it works for a few hours and then stops working. Then it fails to ignite altogether. I'm assuming at this stage it is water damage. Do they dr ... more