Thread: Bosch SHU43 problem

Hi,

If you have a burnt solder joint, do you need to get a new board?

Most times yes.....esp if under the 5 year parts warranty!

jeff.

Unfortunately, I am out of warranty.

Since the heater was working when I measured the temp last night 160 degrees, and it still had the same problem would you think the temp sensor is defective?

Or should I start by buying the replacement circuit board?

A test that may help....

http://www.applianceaid.com/boschDW.html

jeff.

I tried the test

"If NTC probe (f2/f4) has failed (opened), CLEAN light will come on immediately and testing will end shortly after water has started circulating."

The clean light is on for the duration of the test. But the test does not stop. It just keeps on going.

That is what I do not understand.

Another NTC test....Normal resistance is approx. 50K ohms @ room temperature. Resistance decreases as temp. increases.

If ok, sounds like new control time.

jeff.

OK, I checked the resistance on the NTC. Temperature of water in bottom of dishwasher was 70 degrees. Resistance was 63.7K ohms. Is that close enough to spec? Or does that mean NTC is bad. I am not sure how big a range is acceptable.


Thanks for the help!!

-Sounds- too high to me....might be worth replacing. + or - 5% is usually ok.

jeff.

I have a similar issue - water not hot and runs forever, had to replace the control module cover - then this issue with low water temp and runs forever. looked at the circuit brd and it had a burnt solder joint, reheated but still not running correctly. My delima is do I change the heat or the control pcb firts? Any suggestions are appreciated..

Hi,

My delima is do I change the heat or the control pcb firts?

My guess, control board.

jeff.