How to test the spark generator on a Baxi boiler

hello and welcome to the latest installment of baxicam now zahira's been in touch and he's left a comment on one of our youtube videos and he wants to know how you test the spark generator now there's a couple of ways of doing this one mate so for those of you that have been on the three-day course with us here at baxi you might have been lucky enough to back yourself one of these little fellas which is a spark tester so what you can do is pull the spark electrode lead off the back of your ignition electrode bung that on the back there now grab your spark lead and bug him on the back of your spark tester if you turn the boiler on and put a heating or hot water demand on then hopefully that little fella should start flashing up red if it does flash up red your spark generator is doing the business for you now if you're not lucky enough to have one of these or it's not flashing up red there's another way of testing a spark generator and that's with a multimeter so with class a spark generator as a working component so in order for it to do some work we're going to have to send some voltage to it and we can also check the resistance of it as well with our multimeters so enough talking let's get to it okay then here we'll make a start mate so if you think you've got an issue with the spark generator especially on one of these boilers you're going to get the fault code with e1 33 if we have a look down there it says e133 is the gas supply fault so before you go diving in and taking the covers off what i personally do hold them in reset and let go and just see how far he gets on his sequence of operation so what i'm going to need to do just to uh hurry along a bit is pop a hot water demand on there we go so green lights on the tap there so i can hear the fan running now shortly after the fan runs i'll be expecting it to spark i don't know about you mate but i can't hear it sparking so i'm instantly thinking maybe i've got an issue with the generator on this one like i said before the generator is classed as a working component now in order for it to work the circuit board needs to send voltage to it and we could also check the resistance of it as well so i'll give it three or four times and he'll lock himself out on e133 there he is he won three three i can knock that tap off now so i've already done my electrical safe isolation my earth continuity short circuit and resistance to earth are good and i've also checked the polarity as well so i know my polarity readings are correct so if i just turn the boiler off from here now because what i want to be doing first is measuring the resistance of that spark generator and when we're measuring in resistance we set our multimeter to the ohm scale with the power turned off so the spark generator on this boiler itself is that pretty green one the top of the boiler there okay so if i grab my multimeter and set him onto the ohm scale like so right if i remove the plug there and what i'll be able to do is go across them two pins there and i should be getting a resistance reading now the resistance of that generator is 3 million ohms or three mega ohms which you'd be able to find by phoning tech support or if you've been on one of our training days in the past you would have got one of our engineer manuals that will tell you that now it is important to uh to kind of get to know your multimeter as well because some multimeters they only go up to two million ohms so if you're trying to get a reading of three million ohms your multimeter is going to show you that reading there but this multimeter as far as we're aware reads up to 40 million so i should be able to get some resistance on this so i'll go across them two pins there and you'll see the resistance i've got it's open line okay so i'm already thinking okay so i've got an issue with my spark generator because it should be three million but i've got open line instead what i need to confirm as well is i've got power going to the spark generator like i said before the power ultimately comes from the printed circuit board okay so i'm going to have to turn the power on to the boiler and we're going to set our multimeter to volts dc now dc is the flat line because it's direct current it's flat and it's smooth so let's pop my multimeter down there grab a screwdriver undo these two screws so you'll be able to get the the wiring diagram online on parts arena which should show you where the connections for the spark generator are but i'd be able to tell you that it's the brown wire there on the right and the end blue one unplug x2 okay so we want to with our multimeter probe we want to go um red to positive so red to brown and the black to the the blue now a reading of anything around 110 volt dc is a good reading for that so let's see what we've got just uh set the multimeter up already on volts dc i don't need the power turned on all right so let's reset him because he locked out previously on b133 oh yeah look the fan's running so it's going to be a flash voltage as well it's not going to be something that you're going to see all the time so as soon as the fan runs i'd be expecting i'd say anything over 100 volts dc to flash up there you go 152.9 and it's gone okay it's gonna have another go so there's my probes there like so red to positive that's a negative i'm trying again there he is 252 volts dc okay so i know my circuit board is sending power to the generator i also know that the resistance of the generator is open line so there can only be one problem with this and it is the generator so if you replace the generator on that as a here you'll find you fixed the boilermate so guys and girls i hope your families are doing well and you're staying safe until next time take care you

Channel: Baxi - sustainable heating and hot water solutions

Views: 39,634

Keywords: Baxi cam, Baxi training, Heating engineer, Baxi boiler, spark generator, Multimeter, spark tester

Id: yz5dpbzdngo

Length: 7min 4sec (424 seconds)

Published: Tue Oct 06 2020