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please be carefull check with your installer first putting a zone valve on a gravity circuit could cut off the expansion pipe.

we to do warranty work for a boiler manufacturer and at least 70% of benchmark forms make no sense at all, and a good proportion filled out with figures from the instruction book ,as for installers with fga's in our area a good proportion own them but never see the light of day.we completed cpa1...

Hi Sam check the earlier posts but unlikely to be the diverter more likely gas pressures or blocked Domestic hot water heat exchanger

Tony DF facility? I know this is going a little off topic here but I think we have spoken before we are a member of argi and used to post on there site as mudd my wife used to help when they first got started unfortunately work load got the better of her so she doesnt do much posting etc now.

In sunny Morecambe

if you have a new plate type heat exchanger they are difficult to clear even with a powerflushing machine,and probably better to replace it

make sure your heating is switched off so you know your hot water switch is activating and staying on, the diverter valve will move across to the right. if the temperature guage is working on the front of the boiler and you have a blocked heat exchanger you will see a sharp rise in temperature...

DUHHH!

we deal with powermax but unfortunately are nowhere near,a common fault is incorect setting of the gas pressures they are odd to set up.the pressure is set up as a differential between the gas valve and fan at minus 0.13 millibar( powermax 155x) .then the gas pressure should be checked...

they also do a copper pipe kit which removes the rubber hose problem altogether.

what size of property is it how many occupants if you have this information you can work out aprox size of cylinder and pannel requirement 50 litres of hot water per person per day plus 50 so three people will require aprox 200 litre store ,this will in tern require aprox 4sq meters flat plate...

I agree, constant toping up causes corosion within your heating system this then accumulates in the main and especially the secondary hot water heat exchanger.the servo valve has a red microswitch on the back the switch should make fully when you run the tap,you will need a new servo valve and...

we have fitted quite a few 400 series boilers and have had a problem with one particular installation even after powerflushing the system was innitially very dirty the only way we cured the problem was to fit another pump on the return ,that was nearly 18 moths ago and has been fine since seems...

I now this may sound stupid but I have come across this before check E N L are all correct we had a house wired back to front and that blew fuses,you should have 240v on three power out and 4 power in to fire the boiler when initially powered up the boiler checks resistance on fan pump gas valve...

OOps so used to advising other installers wasnt thinking

firstly you have deffinately emptied the expansion vessel and it will need recharging secondly if you read the instructions the boiler needs the fan to run at high speed for the the boiler to ignite correctly once the flame has been established and indeed the green light comes on the boiler...

hi Im presuming you have the same problems with all your taps not just your shower but do check your shower is not passing and blending your hw temperature.first turn off the right hand return service valve to your boiler if you then have hot water you may have a diverter problem,this is unusual...

just behind the pump top left is a pressure differential switch black a small 4mm pipe attached and a red microswitch on the top there is a white lever on the top when the boiler opperates the pump starts and this white lever lifts breaking the microswitch it then goes into the ignition sequence...

If you turn off the right hand service valve off this would stop anything passing down the heating if you then have hot water you could have a problem with the diverter valve but it is unusual on that model.once you have checked that you need to check the gas burner pressures min 1.5 max 7 the...