Hotpoint Aquarius FDL 570 Fault

[Steve RM]

Well I’ve searched high and low to find out what these flashing lights mean on my daughter’s dishwasher but no joy, so here’s a video:
[video=youtube_share;qBFFth_Dveg]https://youtu.be/qBFFth_Dveg[/video]
I reckon that’s LED1 and LED3 flashing, but haven’t been able to establish the meaning.

The behaviour is this:
a) Switch on – machine drains as expected
b) Then the tank fills up
c) Then the flashing business begins. The circulating pump seems to be operating and continues to operate even when the door is open.
I checked the float switch and base which interestingly were all gummed up with gunk from a previous bad experience so after cleaning all that off, was hopeful that would fix things. Alas no. But it does raise the question of how that got there in the first place. And there does seem to be a leak because after each attempt to get the machine going, there’s water appearing from somewhere. The drain pipe seems OK though.
Any ideas?

[electrofix]

pressure sw fault

Dave

[Steve RM]

electrofix wrote:pressure sw fault

Dave

Thank you – will check that.

[Steve RM]

Right – thanks for the idea but it didn’t work:

• I removed the pressure switch and tested it by blowing into it, and measuring the electrical resistance. The switch closed when the pressure was applied.
• I also checked the pipe, which was intact – and I blew through it – it was clear.

So, perhaps the pressure switch is out of calibration? Likely, or not? Is this how pressure switches fail?

The operation of the cycle also may provide a clue:

• The machine drains
• The machine fills
• At the end of the fill, there’s a clunk and for a fraction of a second the main turbine seems to spin – can hear the characteristic “whoosh” – but then everything stops and the lights flash.

Any ideas?

[Steve RM]

Edited the above post to include latest information… still stuck.

[electrofix]

2 things you could try

1 remove and reconnect the wires to the pcb in case of bad joint

2 let it fill up and the switch off at plug with water in and see if pressure sw has operated

Dave

[Steve RM]

electrofix wrote:2 things you could try

1 remove and reconnect the wires to the pcb in case of bad joint

2 let it fill up and the switch off at plug with water in and see if pressure sw has operated

Dave

OK – will check that – good idea!

[Steve RM]

The latest news: changed the pressure switch, cleaned the contacts oin the ciurcuit boards. Also pulled out the turbine and cleaned it – full of gunk.
Now this:
[video=youtube_share;DtpVSgoE9sk]https://youtu.be/DtpVSgoE9sk[/video]

So for the first time the symptoms have changed which makes me feel happier. Is this now a water leak?
(Also – what colour are the wires that go into the float switch – blue or orange? I fear I may have mixed them up with the pressure switch – same connector, same lead length, stupid error on my part)

[electrofix]

wire to the overflow sw will probably be thinner

overflow goes back to connector CN5 on the board

pressure switch goes to CN02 which is one of the bigger connectors

Diagram does not give colours

Dave

[Author]

Posts