[Pw98]

Re: bosch 1200 classixx express not heating water

Thanks – I removed all the connections on the PCB one by one and and checked them and they all look clean and good. I replaced the heater element with the orginal one and it still (not surprisingly) not work.
This has a reading of 26 Ohms.

I see that one wire goes to some kind of device at the top of the machine, but held on the side of it. This has 4 wires to it. Its about size and shape of a fist The other wire goes to the main PCB. (Pressure switch??)

I cant see the heater relay on the PC (or is it that white square housing just behind the dial)? When the motor clicks in to turn the drum I think I can hear it click from hear. so I dont think this is it.

many thanks

[Pw98]

Re: bosch 1200 classixx express not heating water

Sorry yes the connections are now very good. The “melted” one I have cut the wire and replaced it with a brand new push on spade connector. If there is power in the cables then it will get to the element I am 100{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} sure.

[Pw98]

Re: bosch 1200 classixx express not heating water

Ok. As best I could with the machine at 45 degrees and on a 90c program after filling with water, I assume it then heats the water, it reads zero on a multimeter. I have tested with an electrical screwdriver for any power at both element connections and it shows no power. The multimeter test I am not 100{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} sure the contacts were good 100 {e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} of the time but the reading was always zero. I tested the electrical screwdriver in a wall socket and it works fine.

So there is no power to the element, which it pretty much a good conclusion as the element is brand new.

Where now ? Tracing the many brown cables to the circuit board is a bit of a hit and miss affair as there are about 6 that head that way.

Many thanks

[Pw98]

Re: bosch 1200 classixx express not heating water

thanks – any other clues? It is worth lifting up the machine, so I can access the conectors to the elements and fit a pair of crocodle clips to a voltmeter to see is power is getting to the element, or is it far to say that no power is getting there and the problem is elsewhere?
what are my next steps (apart from the high st for a new machine)

many thanks

[Pw98]

Re: bosch 1200 classixx express not heating water

thanks – I have measured the NTC and it has a resistance of 6.4 on a 200k scale. Is this ok?
I think I can see the relay on the circuit board, and have pushed all the connections hard. although none seemed loose.

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