Question about Bosch SHU9955UC Built-in Dishwasher
The long cycle times indicate a fault in either the water heater circuits or the timer.
I'm assuming from the model number you are in the US and therefore on a 120v supply. The heater is about 2000 watts, so a 10 amp draw is indicative of increased resistance (and therefore a fault) on a 120v system. If resistance through the coil (in ohms) in the water heater increases, the draw (in amps) will drop.
2000 (w) / 120 (v) = 16.7 amps
If you are using a 240 volt supply:
2000 (w) / 240 (v) = 8.3 amps
I suspect your water heater is failing. Either burning out or possibly shorting to earth. This is consistent with the symptoms of the fault, i.e. long cycle times but with evidence of heating. If there is a short to earth within the heater, it will still heat and draw current. A short to earth within the heater wont necessarily trip a breaker, but it will trip an RCD if you have one fitted.
You need to test for resistance (Ohms) between the hot/live and common/neutral terminals on the water heater. I'd also advise testing between the hot/live and earth terminals on the water heater. If you have continuity between hot and earth, the water heater has failed and needs to be replaced.
I'm assuming you have a multi-meter for conducting these tests? Please can you resistance test the water heater as described above and let me know the results. I also need to know whether you are on a 120v or 220-240v supply.
Please disconnect the dishwasher from the power supply before conducting electrical testing.
Posted on Mar 11, 2011
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Posted on Jan 02, 2017
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