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The pilot Injector blocking or electrode lead Shorting out are a problem with the ultimate boilers

I have a ford transit and have just noticed what appears to be a broken switch on the frame where the sliding door touches {not the contact switch at the front of the door} it is on the right hand side of the opening can any one tell me what it is for?

Possiblle flat expansion vessel may need recharging,this can give F9 fault.

Vaillant now do a system turbidity test and put on the report if it is below 200ppm nothing to do with the combustion reading.

Vaillant now do a system turbidity test and put on the report if it is below 200ppm nothing to do with the combustion reading.

Call out worcester to repair

You do not need a 140 if you have a 360 it would not work anyway.Personally i would buy a Honeywell prog. roomstat much better in my opinion .

Go into d codes see what flow is registering also s code will tell what boiler is doing if no leak on system could be plate h/exch passing into system, check prv for leak.

Fitted one last week fantastic, cistern already fitted took 30 mins to connect no problems since fitted quality good reccommend them.Basically idiot proof

I had similar on a glow-worm energy saver combi traced mine to a dripping tap preventing heating coming on or for short cycle.Basically pre heat kept over-riding central heating,To prove turn dhw off on boiler or rising main and see if heating comes on then.

F6 central heating flow ntc fault sounds like your plumber is telling porkies

Could be a shower or mixer tap letting bye if you have any ?

If it has orange led then give the boiler a thump it usually springs into life then change pcb when convenient.

Had a flow sensor fail under warrenty Vailant fitted new sensor within 24 hours sprung a leak.Another vailamt engineer apologised and said clip was wrong orientation and had moved under mains pressure no problem since fitting clip correctly.

J1 is just telling you the boiler model.

F23 could also denote flow and return pipes wrongly piped up.The combustion cover is on the heat exchanger so contrary to corgi is not illegal to remove cover.

Quick question has the tolerances for lpg w/p on propane changed i work to 37mb +/- 5mb . Have been told some regulators now +8/-12mb if upso not fitted.

Blocked plate heatexchanger F9 on your age boiler is a generic code.

Gasguru has told you the problem ,i had one leaking down the condensate.

The diaphrams are easy to source P/No S801191 .