Siemens iq700 SN26T597GB/76 Error E31

[Monkeyboy10]

Hi,

Have this beautiful Siemens dishwasher that has suddenly stopped heating up. No matter what cycle its put on, always completes the programme and on time. No heat what so ever and shows E31 at the end of the cycle.
Heater checked and has continuity between 2 of the pins on terminal. PCB checked and no obvious signs on that…
Any suggestions welcomed…

TIA..

[electrofix]

Re: Siemens iq700 SN26T597GB/76 Error E31

got a bosch dishwasher ( same design) with this very problem. since heater is ok and ntc are also ok am assuming a board fault

am doing some investigation on the board will post if I find anything

Dave

[Monkeyboy10]

Re: Siemens iq700 SN26T597GB/76 Error E31

Cheers Dave,

Also looked on Siemens page and found exploded view parts diagram. On there (item no 0470 ) it has a heating element as well as the heat pump. I though that it was the motor/heater pump combined thing.. Is it worth looking to find and check that for continuity ??

Scott..

[electrofix]

Re: Siemens iq700 SN26T597GB/76 Error E31

looked and see what you mean. if you look that heater is attached to a fan motor which seem to suggest a form of hot air drying. If I am right this heater is meant to heat air and not the water

Dave

[Monkeyboy10]

Re: Siemens iq700 SN26T597GB/76 Error E31

Think that is correct Dave, the code E31 when looked up on Siemens site says “A fault has occurred in the dishwasher’s drying system, resulting in the water not heating up during operation and the dishwasher not drying. Your dishwasher might need repairing. To book a repair please call Siemens customer service on 0344 892 8999 and choose option one, or you can book online. For more information about booking a repair please click the “arrange an engineer visit” link below.
It has this Zeolith drying thing on it. I’ve removed the heater element and it’s like a tumble dryer element with the heater coils on it. Even though there are rubber “o” rings sealing it, it’s fairly damp and grimy in there. The compartment of the drying system where it sits is also damp.. my thoughts are it would have to be completely dry in there.. I’ll try and attach photos on here and let you have a look. Also I’ve checked across terminals and I’ve still got continuity. Bit of an expensive gamble for £105..

[Monkeyboy10]

Re: Siemens iq700 SN26T597GB/76 Error E31

Pic of heating/drying element

[Monkeyboy10]

Re: Siemens iq700 SN26T597GB/76 Error E31

Another

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