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If you have a balanced flue or open flue 3.5 then you have a perm pilot re lit by depressing the grey gas valve button and pressing the ignighter button as per the instructions on the back of the front panel , if you have a fan flue model this has a reset button, again se back of cover for the...

24I does not have a plate heat exchangern ? Expect to pay around £220.00 for a replacement heat ex from Worcester supplied and fitted

Sounds as if you need a de scale or replacement as well as a scale preventr/reducer fitted.

The 9.24 uses two diff diverter valves, the one noted plus 87161567100 so you would have to find out the exact model 9.24 you have. Both valves are still available and nothing on the 9.24 is obsolete (yet)

Your boiler if it is a 24i has only one heat exchanger with a double matrix ,in other words two coils above the main flame one full of domestic water circulated by mains pressure when you run a hot tap and thje other coil full of heating water circulated by the pump on demand . If you run the...

The slow flash of the CH light means burner lockout and all the compoments that could produce this fault are dificult to test,gas valve flame senser etc, you would be best off getting Wircester to look at at .The pump is supposed to run on to cool the boiler down when the gas to water heat ex is...

As long as you replace it with the corect switch "part number 87161424140 " then you will have no problems the new switch comes complete with new wireing instruction if you have the old black switch.if you do wire it wrong it will fail safe.Im giveing you the part number as its obvious your...

JTW when you say the ch isnot hooked up yet ? i hope you have at least one rad on full of water or you have damaged your boiler

IF your fan is running the you could hav a flue fault, your air pressure switch should pick up the air movement through the flue then start the ignition so check visually that nothing at all is blocking the flue terminal.If your boiler has a black air pressure switch as originally fitted then...

Comon fault on the 280 Worcester is the diverter valve not working. Drop down the controll panel and look at the white diverter valve body you should see a small black button between A and B when you switch on the cental heating it should move across from one to the other, check the demand light...

The filling knobs do get tight and sometimes need a pair of pliers to get them going. look on the inside of the boiler case for instructions as to what way to turn, if your right handed then its your thumb going right to left as you turn it

your corect pressure should be around 1 bar when cold and then rise to about 2 when hot. Any leaks from the rad valves etc will be small but will still result in the gauge dropping but no need to turn it off if its above 0.5 and if it does fall fill it back up from an external filling loop or...

Do you mean it trys to fire for a second or runs constant hot water out the tap?

Unless you have X ray vihion you cant tell the condition of a heat ex by looking in its ports ? I f you have an early 9.24 the the pump speed is a swine to get at if its the original pump tehn you would do no harm to replace it at around £35 trade

Most comon thing to blow a fuse on a 240 would be the pump, then the fan.The board itself wont blow the fuse but could get damaged if you blow too many. Do you have the abilaty to test the pump ? Just rememberd one other thing sometimes the diverter valve will leak from the spindle into the...

As above it has no perm pilot ? so what will it do.

You have a restriction somewhere in the boiler if its not a hard water area then the first place to look would be the filter fitted inside the top manifold, instructions on how to remave it are in the fitting instructions book. If no instructions in your book then your boiler does not have a...

Hve you tested ut in CH only with the hot water stat at off and the timer off at hot water.How old is your 400 ?

Your last paragraph sounds correct,you have a poor transfer of heat but you cant assume your pump is ok just because the heatind is. Your gas output is lower on heating than hot water and stored in a larger body of water ,when on dhw the boiler is on max gas and only circulateing around the...

Thr PRV on the 24 i is held in place with 1 clip and one 1/2in nut ,new washers are supplied with the new valve ,simply turn off the power drain down the boiler (twist and hold open the red cap)and replace the valve.