ADG7550 not heating

[davidkerr]

Hi,
I have a F3 fault and no water heating. I have checked the continuity and resistance of the heater element and the NTC and believe they are both normal. Is there any method to test the RE2 relay on the control board? Is there any other fault I should be looking for.
Thanks.
machine info is 8542 755 15860
SER 33 0543 007421
ADG 7550 Typ N1C
Board service 212954
Data 712944

[electrofix]

Re: ADG7550 not heating

only way you can check the relay is to measure the coil voltage when its live

ie 12 volt relay and coil is at 9v dc or above and its not closing its gone

Dave

[davidkerr]

Re: ADG7550 not heating

Thanks Dave,
I set out to check the relay but found the fault before I reached the relay. No continuity between one side of the heater and relay. One wire was broken by fatigue where it bends at the bottom of the door when it opens and closes, as was the flexible cable sheath.
A nice easy and cheap repair, although it took me a while to find.
This is a brilliant service.
Many thanks.
David.

[Author]

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