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Runs many hours before finally shutting down Related Models Bosch  SHU9956 UC/12 (FD 8105 -)   Bosch  SHV4303 UC/06  

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  #1 (permalink)  
Old 02-26-2012, 11:20 AM
DRA DRA is offline
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Default stays on too long
Model Number: shu9955uc-14   Brand: Bosch   Age: 5 - 10 years   

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Runs many hours before finally shutting down


Related Models
Bosch SHU9956 UC/12 (FD 8105 -) 
Bosch SHV4303 UC/06 
Bosch SHV4303 UC/06 (FD 7712-8002) 
Bosch SHV4303 UC/11 
Bosch SHV4303 UC/11 (FD 8002-8003) 
Bosch SHV4303 UC/12 
Bosch SHV4303 UC/12 (FD 8003-) 
Bosch SHV46C03 UC/14 (FD 8211-) 
Bosch SHV4803 UC/06 
Bosch SHV4803 UC/06 (FD 7712-7812, 7905-7907) 
Bosch SHV4803 UC/07 
Bosch SHV4803 UC/07 (FD 7812-7905, 7907-8010) 
Bosch SHV4803 UC/12 
Bosch SHV66A03 UC/14 (FD 8301-) 
Bosch SHV6803 UC/12 (FD 8105 -) 
Bosch SHV99A03 UC/14 (FD 8212-) 
Hoover SHWA2501A WASHER-TOP LOADING
Hoover SHWA2501W WASHER-TOP LOADING
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Hoover SHWA2506W WASHER-TOP LOADING
Hoover SHWA2506WT WASHER-TOP LOADING
Hoover SHWA2507V WASHER-TOP LOADING
Bosch SHX33A02 UC/14 (FD 8211-) 
Bosch SHX33A05 UC/14 (FD 8211-) 
Bosch SHX33A06 UC/14 (FD 8211-) 
Bosch SHX43E02 UC/14 (FD 8211-) 
Bosch SHX43E05 UC/14 (FD 8211-) 
Bosch SHX43E06 UC/14 (FD 8211-) 
Bosch SHX46A02 UC/14 (FD 8211-) 
Bosch SHX46A05 UC/14 (FD 8211-) 
Bosch SHX46A06 UC/14 (FD 8211-) 
Bosch SHX46A07 UC/14 (FD 8211-) 
Bosch SHX46B02 UC/14 (FD 8211-) 
Bosch SHX46B05 UC/14 (FD 8211-) 
Bosch SHX46B06 UC/14 (FD 8211-) 
Bosch SHX46B07 UC/14 (FD 8211-) 
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Bosch SHX56B05 UC/14 (FD 8211-) 
Bosch SHX56B06 UC/14 (FD 8211-) 
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Bosch SHX99B06 UC/14 (FD 8212-) 
Bosch SHY56A02 UC/14 (FD8301-) 
Bosch SHY56A05 UC/14 (FD8301-) 
Bosch SHY56A06 UC/14 (FD8301-) 
Bosch SHY66C02 UC/14 (FD8301-) 
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Bosch SHY66C06 UC/14 (FD8301-) 
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  #2 (permalink)  
Old 02-26-2012, 11:55 AM
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Could be a faulty water temperature sensor, it won't close the cycle without the water reaching the proper temp.
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  #3 (permalink)  
Old 03-06-2012, 09:52 AM
DRA DRA is offline
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Default Bosch diswasher run excessive long.

Quote:
Originally Posted by prschroeter View Post
Could be a faulty water temperature sensor, it won't close the cycle without the water reaching the proper temp.
I'm presently looking at a possible faulty water trmperature sensor. Thanks for the suggestion. I read somewhere on line that it should read 55 ohms with an ohm meter at room temperature.

Running the machine through the diagnostic mode did not provide any usuable information.

I will update findings

Doug
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Old 03-10-2012, 08:53 AM
DRA DRA is offline
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Quote:
Originally Posted by prschroeter View Post
Could be a faulty water temperature sensor, it won't close the cycle without the water reaching the proper temp.

Thanks for the heads-up. I tested the input current with my Amprobe and found I got the correct value (1.5 to 2 amperes) when the drain pump or the circulator pump were running. When it was time for the heating element to function, I didn't read the normal 11 amperes. I now proved that the water is not heating during the wash cycle. Your were spot-on!

My next step to measure the voltage out of the control board, using a voltmeter. I sould measure 120 VAC on the RED wire when it is time for the water to heat during the wash cycle.

Getting a correct 120 VAC reading will prove that the relay in the control module is functioning and sending the required voltage to the heating element circuit. Unfortunately, there is also 2 sensors/switches in this loop, so further testing will be required to deterime which of the 3 components is actually defective.

No measured voltage will comform a defective control module. I will post updates.

Doug
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