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Customer Questions and Answers for Heater Assembly by Bosch

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Manufacturer Part
4.89 (64)
By: Bosch
Part Number: OEM8407359
Manufacturer Part Number: 00480317

The Heater Assembly is an OEM part for Bosch dishwashers. This part heats the water during the wash cycles, ensuring that dishes are cleaned effectively and sanitized.

Causes of a bad heater assembly can include electrical issues such as short circuits, mineral buildup from hard water, or wear and tear from regular use.

Symptoms of a bad heater assembly include:

  • The dishwasher not heating water properly
  • Dishes coming out dirty or not fully sanitized
  • The dishwasher taking longer than usual to complete cycles
  • Error codes related to heating issues

This OEM Bosch part is also compatible with Thermador, Gaggenau, and some Kenmore models.

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Questions & Answers

For Bosch Heater Assembly (Part Number: OEM8407359)

1 Answer

Hello Betsy, Yes, you will need to pull out the dishwasher and lay it on its back to access and replace the heater in the unit. Thanks.

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1 Answer

Raj, You will want to test the heater and thermostat on this unit to make sure that they are good. You will test them for continuity. The model number that is listed is not coming up as being valid. In most cases on this unit you would need to pull the unit out and lay it on its back and remove the bottom tray from the unit. This will give access to the heater assembly on the unit.

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Bill C for Model Number SHX46A06

My unit is not functioning correctly. It seems to be not heating. I've run the diagnostic program and it shows heating error (1 blinking light at the end of the cycle - it's a hidden control type and so doesn't display codes or times). I've looked at the control panel and visually it seems fine. There is 120V +/- at the heater terminals when it is circulating. However it's not drawing any amps and the entire dishwasher is only drawing about 1 amp during circulation. So it seems like the problem is more likely to be the heater than the control panel or wiring? This part looks like the correct part for my unit, but in another answer you indicated that this part comes with the hi-limit, NTC etc. however that stuff is not shown in the picture. Is there a complete assembly I can order/is this it?

1 Answer

William, We do not have much information on the unit but the Error code indicates Ionization Failure during operation and says to check the following things 1. Check gas type, see Fig. 2, page 6. 2. Check three wire connections to ignition group on the lower front of the heat exchanger are secure. 3. Check venting specifications are met. Improper venting may cause unstable burner flames and loss of flame ionization. 4. Check that the minimum power fan speed has been adjusted to the proper value. See page 18. 5. Check gas pressure, see section 3.12, page 27. 6. Check and adjust CO2 readings, see section 6.4, page 33. This information also appears to be in the owners manual.

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Patricia for Model Number SHX46L05UC/24

Our dishwasher has been taking longer and longer to run the usual cycles. When starting the dishwasher the times displayed are 192 (normal), 156 (econ) whereas before they were around 120 and 90 respectively. The dishwasher runs for even longer than the time indicated and gets stuck at 1. I ran the test program and got an E1 code. I have looked at the control board and don't see any burnt out solder joints. Any ideas on how to further assess this issue? I'm trying to narrow down if it's the control board, heater assembly or something else. Thank you for your help!

1 Answer

Patricia, You will want to check the heater assembly to make sure that it has continuity and check the hi limit that is on the heater to make sure that it has continuity. If they check ok then the control board is faulty and would need replaced.

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2 Answers

Ken, Unfortunately it appears that the water heater assembly 488136 has been discontinued and the manufacturer does not list a suitable replacement.

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2 Answers

Ken, The 00480317 / 00480317 Heater Assembly is the correct part to order based on the post information and model number. The assembly includes all components (aqua sensor, hi limit, etc.) needed to replace the heater assembly. The part is in stock and available at this time. Thanks

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