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Had usual no heating on this one, decided it had to be the board (done so many). Although unlike before there was no sign of damage at relay on the board. Also I had checked the heater and wiring to the heater.
Board fitted today and still no supply to heater. Tried test to I presume the safety stat located on the heater assy and ok. Also next to it again I presume a thermister and it tested .863kohms.
I am going for faulty thermister, anyone got any other ideas?
Brian
Couple of things i would check for Brian –
Water levels – low water levels will stop the heater from firing up – Check the pressure chamber and hose on the left hand side.
Wash motor – whats the circulation of water like when the machine’s running ? It will need a certain amount of pressure to operate the safety pressure switch situated on the end of the water heater.
How are you testing the heater is not getting any voltage ? Dependant on the cycle , the heater may not come on for quite a few minutes. I find the best way is to put it on a quick wash , close the detergent door and then start the cycle. When the detergent door thumps open , thats the time heating should commence…give or take a few seconds
Re: Bosch Dishwasher SGS43A12GB/12
You could try test program.
Selecting the programme:
– Switch off the appliance
– Press and hold down buttons S2 and S4
– Switch on the main switch
The following displays are indicated on the control panel:
– LEDs L2 and L4 flash.
– For as long as the two buttons S2 and S4 are held down after the appliance has been switched on,
an identifier for the version coding is displayed following a successful overtravel contact scan.
– If one of the buttons is pressed, the associated LED lights up.
– If button S3 is pressed, the display and the refill indicator LEDs also light up.
– If the preselected starting time button is pressed, an 18h illuminates in the segment display.
Starting the programme:
– Press buttons S2 and S4 again.
If button S1 is pressed during alternate rinsing (WS), the water points remain in the top basket position the next time the water points change (within 60 s). LED L1 illuminates for as long as
the top basket function has been selected. Preselected starting time is not possible. The test programme is ended by switching off the appliance via the main switch.
The following fault codes can be displayed:
Fault code
0 There is no fault
1 Fault with the Aqua sensor system Note: Display even if there is no sensor!
2 Heating fault
4 Filling fault
8 Fault with the NTC system
16 Water points
If more than one fault is identified, the fault codes are added together (e.g.: fault code 3 = fault code 1 + fault code 2)Re: Bosch Dishwasher SGS43A12GB/12
Why bother with the test prog…. just stick it on a quickwash, the heater should come on a couple of minutes after it stops filling.
Never had an NTC fault yet.
Re: Bosch Dishwasher SGS43A12GB/12
superfix wrote:Why bother with the test prog…. just stick it on a quickwash, the heater should come on a couple of minutes after it stops filling.
Never had an NTC fault yet.
Problem is it isn’t as the OP stated it is not heating.
You should bother because A) You’ve checked everything and not found the fault B)You can skip test straight to heat C) its the appliance monitoring the fault, so if the board states the NTC is out of range no matter how much your multimeter states its ok, the module will continue to default.
So in the test programme one of two things will happen, it’ll tell you the faulty component or it will not.
If though it tells you the NTC or heater is faulty, ignore your tests and replace the component, if it tells you nothing, then the module is rogered, but since you’ve already replaced it.
Maybe you have never had an NTC fault, that just means you’ve never had one faulty, does not mean that they don’t go faulty. :rolls:
Re: Bosch Dishwasher SGS43A12GB/12
Thanks for info Lee.
I am aware of how rare the thermister fault may be, but I did have another thermister back at the shop and the readings are well different.
So here goesthanks again all
and
A MERRY CHRISTMAS TO EVERYONERe: Bosch Dishwasher SGS43A12GB/12
Lee, you can be a right ar$ey get.
In 11 years of working for BSH I have NEVER had an NTC fault, of course they may go faulty, buth there are other things that are far more common to check first.
Has the OP checked the pressure chamber and sump hose as Nomad Paul suggested ?.
Those two are by far and away the most common fault for no heat.
Re: Bosch Dishwasher SGS43A12GB/12
yep have checked both pressure chamber and sump
going back today with replacement thermister so we shall seeBrian
Re: Bosch Dishwasher SGS43A12GB/12
superfix wrote:Never had an NTC fault yet.
Me neither!
I wonder if the new Control Module was configured OK before fitting it in place?
Re: Bosch Dishwasher SGS43A12GB/12
I did a call for a major brand yesterday, there guys been there 5 times, the client stated the longest an eng been in the house was 15 minutes.
Funny there name started with a B.
It started with an heater fault, then a leak, then by the time the guy had finished it needed new circ motor.
You’d think a company engineer was capable of fitting a hose clip properly and wet testing afterwards.
Client asked on the 4th visit why he never tried m/c after doin repair, his reason, I’ve been in the job for years and I no what I’m doing.
Really.
I guess there more interested in getting home than keepin there jobs, then again they can always become self employed.
Re: Bosch Dishwasher SGS43A12GB/12
Hi Martin
Board config ok, I usually put it on quick wash after fitting boards to do a full check.
Countdown time 33mins or was it 35 anyway at no time was there a live to the heater even left it untill it started to drain.When I say live to heater I mean no live to the micro switch situated at the heater terminals.
Well hopefully I can prove or not whether its a NTC fault as am heading there now.
Mind you she lives on a farm and just phoned in saying the road up to the farm is bad with snow.Thanks for all the inputs and I will let you know.
Brian
Re: Bosch Dishwasher SGS43A12GB/12
Made it to her farm JUST!! hooked the thermister on to check and YES I was right, well second time anyway, customer more than happy now.
Thermister installed and running great.Just goes to show never say never
MERYY CHRISTMAS AND ALL THER BEST FOR 2010
Brian
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