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A said by chris your boiler has 240v connections and poss 240v switches hence not allowed near the basin, the clearences around the boiler and the need for ventillation are in the manufactures instructions some dont require ventillation if the clearences are ok you will allso require cross...

All gas appliances have to have the manufacturers instruction left at the site in there is the correct way to service that particular model as recommended by the manufacturer, but apart from cleaning its basically check that all settings are correct and that all safety devices work and all regs...

The Greenstar range you mentioned are codensing boilers, they use a90% ali and 10% silica heat exchanger ,ive worked on this heat exchanger hear and abroad for years (wb5 heat ex) and have never seen any signs of corrosion if it was a problem i would not think Bosch would be spending millions on...

The hole on the right is for the overheat stat on the RSF model. You say you have a pilot lihgt still on so you cant have an overheating problem such as slow pump or lack of water as the interupter stat would have turned off the pilot, there is no low water pressure switch on the 400 and the...

The 400 has two overheat stats one linked into the pilot ,that must be ok as you say the pilot is on the other is a resetable stat under the controll panell. look under the panel and you should see it ,press the button and if it is tripped you will feel the resistance as you press it if has not...

pos probe of multi meter to the boiler earth and negative probe to the contact end of the tc ,but you need a steady hand

You need a good contact with the earth, crocodile clip on a tag is good and meter set at DC mv and as said above a max of around 30 but if below 20 check flame and tip position if ok then replace if fluctuateing wildly then you prob have a bad connection ,most honywell gas valves will hold above...

You need to find out if you have power to the gas valve, have you a multimeter and are you competent to use it plus what model hiflow is it , the data plate on top of the boiler will tell you if its an RSF the plate ison the front, the age would help as well as it was updated a few times, the...

The 80ic is not a common boiler only sold to contact jobs ,it does not have a built in filling loop so get looking for that silver braided hose or simillar.

As Corgigazza said but tru to replace only the motor its only two screws ,a bit tricky but a lot simpler than replaceing the complete valve as the replacement supplied is differant from the original and can be a sod to fit.

Hot water is the bigest demand with the smallest water content. Boil a kettle ,or buy a new stat its a an on the shelf part at any decent suplier,about£12 ,cheaper than a new wall.

Even if the boiler left the factory spot on, the installation is not in the facory. All gas appliances should be commissioned before handing over to the customer even if its just a case of checking the figures without adjustment. As an extra point i like reading some bench mark books to see if...

DONT RUN YOUR BOILER WITH THE LIMIT STAT LIKED OUT,UNLESS YOU LIKE BIG BANGS. The limit stat is tripping because its overheating,its set at around 104 deg C, without it you could end up with a very big bang,ive seen one after someone wedged the button down with timber,not a pretty site. You...

It does sound like your diverter valve has gone if you drop the front panel down and look at the diverter valve you will see a slot with A and B marked on it and an indicator, if you have someone run a hot tap the indicator will not move then shut off the hot tap and select heating the indicator...

If your pressure rises but does not fall after water loss then it cant be your expansion vess as it would fall down to zero ,you have one of two problems,first your filling key is in place and the tap is passing(easy to check) second your plate heat exchanger is cross leaking,thats to say the...

The corect pump pressure is on the data plate atached to the boiler, dont try adjusting anything unless you have the corect tools to check it. You have a two year warenty with worcester so give them a ring, you only need proof of the commission for the second year warenty. the nozzle cant be...

He has been talking to Worceser as they are the same Worcester heat systems is part of the Bosch group.

Only replaced the diagphram with the Worcester kit,nothing special just the iagphram and its atached spring. If the diverter valve head has been leaking and any wter gets into the micro switch head it goes to pot, one switch is 240 and the other 24 any link between the two and you can get all...

Sound like a water to water heat ex problem from what you say, as the 9.24 is around 17 years old you may want to price a new boiler rather than fixing an allmost obsolete one.

if you loose system pressure the boiler will overheat and emit steam and some water from the auto air vent.re pressurise and check for leaks if the auto is working you will hear it his as the boiler fills if it leaks then it willl require replaceing, check the prv pipe to outside for leaks and...