adg7540 fault codes

[psumm]

Hi I have read all the posts concerning adg7540 dishwasher but I cannot find the fault codes. Does anyone have a list of these? Mine flashes 3 times and I can't figure out what the fault is. Sometimes it works and mostly it doesn't. Rinse cycle always works and it drains, heats, releases the tablet during washes. I have replaced the NTC and this hasn't made a difference. Thanks in advance

 

[Diyisfun]

//www.diynot.com/forums/viewtopic.php?t=68427
//www.diynot.com/forums/viewtopic.php?t=117212

Have a look here http://www.whirlpool.com/custserv/index.jsp#SearchFAQs
also you could try & email them

 

[Sleepyhead]

3 flashes indicates a heating fault. Only 3 things in the heating circuit, NTC (which you've replaced), heater and the pcb itself.
Logically it should be the heater at fault. Easily tested by unplugging from the pcb and metering. You'll be testing the wiring, toc and heater in one go.

 

[psumm]

Cheers lads, thanks for quick reply. I have checked the heater and I'm getting 28ohms through it which seems about right. I removed the module in the door and checked for dry solder joints, broken tracks etc and nothing to note. i cleaned the card edge connections and reconnected. the dishwasher worked fine. tried it again and same fault appeared. the board looks like it is stable enough with no obvious components either blown or blackened. There doesn't look like much to go wrong with it. Is this a common fault? I'm currently checking continuity through cabling and connectors and will get back to you.

 

[Sleepyhead]

Clean the edge connectors on the pcb, maybe even give them a thin coat of solder (resolder the joints on the heater part of the pcb while you've got the iron out), clean and tighten the plug connectors, do the same with the connectors to the ntc and heater.
If none of that works, you're looking for a wiring fault before you start replacing parts.