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just check that when u have had the front disassembled u have not pulled a wire off the back of the main switch on the front.have had this happen before

yes u can still do this on the newer ones

need a bit more info ie what type of boiler and set up.sounds like u have a open system on a combi?

yep they certainly keep warmsure in a job lol

ahhhhhhhhhh xxxx for brains lol got ya

sfb?

had a lot of these.it is the return thermistor bad readings or oc or short.2 min to change and cheap.should read in region of 9700 to 10300 ohms when at 25 c.waste of time changing pcb he needs a meter

could just be a simple faulty clock

is it a 2 channel time clock and what is the hw set on cont once twice ?.if on cont just hw up to temp n turning boiler off

assuming this is a condesing combi.what about condo by product?.always the option of a by law kit and lift pump

aaaah reading this has made me smile thought i was the only one who sufferd from there hands :lol:

sounds like thermistor part no e69-342 2 min to fit

does it ever need resetting on ch mode?

the screw missing from the auto air vent makes no difference

sounds like a dodgey flow switch if u a sparkey check inside the boiler cover should be wiring diagram.shows you were the flow switch is ( the boiler cover not combustion cover )

get a gas fitter to check it out probs just thermocouple and replace wire both cheap.just need a honest plumber who doesnt see work

do the red leds climb to the top of there range when u switch heating on ? if so it may just be the thermistor resistance is reading wrong .if so just change this is very quick and cheap to change.and sounds most likely culprit

check fill and vent are on the negative side of the pump.many are not on older systems and have to be moved when changing to a fully pumped system

the reciever needs live and neutral.then connect 1 and 2 from the boiler to 1 and 3 on the reciever

not a bad boiler nice n simple to mend. change plate exchanger and poss diaphram in diverter valve.should take any decent plumber under a hour to do.these boilers run for years with simple maintance