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Customer Questions and Answers for Relay by Bosch

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Manufacturer Part
4.89 (64)
By: Bosch
Part Number: OEM12225120
Manufacturer Part Number: 00663802

The Relay is an OEM component specifically designed for select Bosch built-in ovens. As a basic electronic switch, it receives signals from the control unit to energize heating elements. 

Durable plastic encapsulation protects delicate components from accidental spills. Precise switching facilitates customized baking and broiling temperatures within close tolerances.

Causes signaling relay failure related to prolonged thermal stresses from consistent oven use. Impacts of electric abnormalities could also cause malfunctions over time.

Symptoms requiring replacement include:  

  • Inability to power top or bottom heating elements during cycles
  • Erratic temperature fluctuations beyond adjustment capabilities
  • Buzzing or loud clicking noises emitting from the relay housing

This OEM Bosch replacement part is also compatible with Thermador, Gaggenau, and select Kenmore built-in ovens employing identical temperature modulation methods. Reinstallation ensures continued customizable and safe cycle performance.
 

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Questions & Answers

For Bosch Relay (Part Number: OEM12225120)

Mike for Model Number Thermador PODC302J/05

Hi, l have a Thermador PODC302J/05. Yesterday we had a power outage. I saw that we had a low voltage to the home as some lights were on but very dim. l shut off the power to the home until full voltage was restored a couple hours later. The oven was not turned on during the low voltage state (but had power supplied it). Later I tried using the oven, when setting it to bake there was a delay of about 5 seconds before it would turn on. Usually it's instant. Some of the modes would not work. I tried resetting it by turning off the breaker for 5 minutes, no difference. When I switch to a mode that won't work the blue power light will blink steadily. If I then turn on the bottom oven more of the modes on the top won’t work. The same happens to the bottom oven. With both ovens on, more modes on both ovens won't work. I get the flashing light for either if I switch to a mode that won’t work. No error code on the screen not sure if this model will show codes. At times all modes will work on one oven but if I turn on the other oven some modes will not work again. Just tried the top oven and everything worked. Speed convection will not work on both ovens at the same time. If I set one to speed convection it will work, but the other one will not. I get the Flashing blue power light. This happens to both ovens. It will work on one oven at a time, but not together. The power supply #00663802. Do you have the output specs so I can check it? It seems either the power supply to the control module #12022214 or the control module itself. It Seems to not be able to run both at the same time. I used both ovens a couple of days ago with no problems. It's been installed 6 years with not a lot of use. Thanks

1 Answer

Mike,

Based on what is happening, this would most likely be an issue with the control module on the unit.

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1 Answer

Peter, the display 00703850 would need to be tested for 9.6VDC from pin 1 to pin 3 during the time of failure. If the display is flashing and voltage has not fluctuated, the display control would need to be replaced. If the voltage fluctuates when the display resets, the control module 12022214 would need to be replaced. It is likely that the failure is in the control module causing both failures. However, there is a small chance the display could be sending an improper signal to the module when it resets, causing the temporary oven operation.

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1 Answer

Kiva,

If the temperature keeps rising then this will most likely be a faulty relay on the control board. The control board part number is 00655358.

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Josh Kelley for Model Number HBL5750UC/06

My Bosch electric wall oven will begin to heat up but it never reaches the correct temperature, it's always about 30 degrees lower when it says it's reached the set temp. It then slowly drops off and will try to maintain heat but loses it over time. You can hear it cycling on, but not for very long. When we turn on the broiler it never gets up to the full temperature and also seems to drop lower over time. I've replaced the sensor and heating element, what's next?

Kerri for Model Number HBL345OVC/08

My Bosch Oven HBL345OVC/08 is stuck on broil, no matter what setting I use. The first time I caught it the oven had been pre-heating for awhile and I was distracted and didn't catch the error code. I haven't been able to get it back. However, in testing, it seems to stay in broil mode no matter what oven setting is set. Seems like the relay needs to be replaced from what information I've been able to gather. I would like to confirm this and get part number.

Korry Nguyen for Model Number HBL5650UC/06

Both upper and bottom oven are not working. See 4 bars on the top left. Have no clue what is the problem. As recommended by appliancepartpros, I ordered and replaced the control and relay boards. But it still doesn’t work. After I set the clock, things seem to work. However, the clock reset over night. Right now, to use the oven I have to set the clock first. Anyway, what cause the clock to reset by itself? Perhaps, the relay and control boards were not the problem.

1 Answer

Korry,

It would be recommended to check to make sure that you do not have a loose power supply connection as this would cause the unit to reset overnight.

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1 Answer

Brandon, the error E118 is indicating that there is a hall sensor failure in the cooling fan. With access to the control module 12022213, the sensor would be tested for voltage at the cooling fan connection from the black wire to the white wire while the unit is operating. If the voltage is 1.7VDC, the fan is operating properly and the module would need to be replaced. If the voltage is not 1.7VDC, the cooling fan 00643600 would need to be replaced. This would need to be done for both the upper and lower fans.

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