Molly Ayala
Bosch electric ovens are popular appliances, but they may occasionally require calibration to ensure accurate temperature readings. This is particularly important for cooking and baking, where precise temperatures are crucial for optimal results. While some Bosch oven models offer built-in calibration features, others may require manual adjustments or professional assistance. Inaccurate oven temperatures can be caused by various factors, including faulty sensors, defective control boards, or blocked heat circulation. Proper calibration ensures your Bosch electric oven functions correctly and efficiently, so you can enjoy perfectly cooked meals every time.
| Characteristics | Values |
|---|---|
| Oven temperature not correct | Check if the oven is a convection oven, check automatic settings, or leave space around the back sides of the oven shelf for heat circulation |
| Oven temperature calibration | Press the "Settings" button, select option "9", change the offset to -35ºF |
| Oven temperature verification | Use a dial thermometer or a digital thermometer to verify the temperature |
| Oven temperature inaccurate | Test the temperature sensor and other components before replacing the control board |
| Oven not heating up | Use a multimeter to determine if voltage is reaching the spark module |
| Service mode | Press and hold both the i and the hour glass buttons, then press the power button |
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What You'll Learn
Check if the oven temperature is incorrect
If you think your Bosch oven's temperature is incorrect, there are several steps you can take to check and address the issue.
Firstly, if you are using a convection oven, review the automatic settings. Convection ovens can automatically change the set temperature by around 15 degrees lower to optimise convection cooking performance.
Secondly, if you have recently purchased a new oven, it is normal to experience differences in cooking performance compared to your previous oven. In such cases, it is advisable to follow the recipe times, temperatures, and rack positions recommended in your oven's manual.
Another important factor to consider is heat circulation within the oven. Ensure that there is sufficient space, approximately 2 inches, around the back sides of the oven shelf for heat to circulate effectively. Additionally, avoid covering the entire shelf with aluminium foil, as this can obstruct heat circulation.
If your oven is not heating evenly, it may be due to malfunctioning elements. In such cases, it is recommended to contact Bosch Customer Service for troubleshooting assistance.
To verify the oven temperature, you can use a dial or digital thermometer. Place the thermometer inside the oven, ensuring it touches a cast iron skillet to maintain an even temperature reading. Set the oven to 350 degrees Fahrenheit (177 degrees Celsius) and let it cycle on and off for at least 20 minutes. Then, check the temperature reading on the thermometer. If the oven temperature deviates from the set temperature by more than 35 degrees Fahrenheit (2 degrees Celsius), the oven thermostat, oven sensor, or oven control may be faulty. In this case, refer to your owner's manual for recalibration instructions or consider contacting customer support for further guidance.
If you own a Bosch Built-in Oven Serie 8 HSG636ES1, you can access the service mode by following these steps: Turn off the oven, then press and hold both the "i" and the hourglass buttons. Once you hear a short click, press the power button as well. This will boot your oven into service mode. Once in service mode, you can use the selector ring for calibration and then test all the touch buttons.
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Test the oven sensor
If you suspect that your Bosch electric oven is not reaching the right temperature, you can test the oven sensor to see if it is faulty.
To test the oven sensor, first, open the oven door and locate the thin metal rod attached to the back wall. This is the oven sensor. Remove the two screws holding the sensor in place and pull it forward gently until you can disconnect it from the oven.
Now, take a multimeter and check the resistance of the sensor at room temperature. The resistance should be around 1080 ohms. If the reading is significantly different, the sensor is faulty and needs to be replaced.
You can also test the sensor at higher temperatures. For example, at 250 degrees, the resistance should be around 1400 ohms, at 350 degrees, it should be around 1600 ohms, and at 450 degrees, it should be around 1800 ohms. If the sensor readings deviate from these values, it is indicative of a faulty sensor.
If the sensor tests fine at room temperature and at higher temperatures, the issue may lie with the control board. However, testing the control board is more complex and may require professional assistance.
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Check the control board
If your Bosch oven is not getting up to temperature, you may have a bad oven sensor or a bad relay control board. Unfortunately, you cannot test the control board, but you can test the sensor.
To test the sensor, first, open the oven door. You should see a 3-4" long thin metal rod attached to the back wall. This is held on by two screws, which you can remove, then pull the sensor forward until it disconnects. Next, use a multimeter to check the resistance of the sensor at room temperature. It should be approximately 1080 ohms. If it is not, you will need to replace the sensor. If the sensor is functioning correctly, you will need to replace the relay board.
If you are experiencing other issues with your Bosch oven, such as the oven light not turning on, you may need to test the control board. First, check that the oven is receiving power. The outlet should be giving 120V, which is the correct power for the oven. You should also be able to see 120V across the terminal block ends, and 2 wires from the terminal block to the L1 and N connectors on the control board.
If the oven is receiving power, the next step is to test the board itself. You can do this by plugging the oven in, disconnecting the power connector from the board, and putting leads in the connector. Alternatively, you can leave the connector in place and push your meter leads into the backside of the connector, testing for voltage.
If you are still experiencing issues, you may need to check for burn spots behind the capacitor solder joints. Bosch boards sometimes burn the solder on the back of the relays. You can also check that no relays have welded contacts.
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Adjust the temperature settings
Adjusting the temperature settings on your Bosch electric oven can be done in several ways. Firstly, it is important to verify that the oven temperature is incorrect. This can be done by using a dial or digital thermometer to check the oven temperature. Heat the oven to 350 degrees Fahrenheit (177 degrees Celsius) and let it cycle on and off for at least 20 minutes. If the temperature is over or under by 35 degrees Fahrenheit (2 degrees Celsius), the oven thermostat, oven sensor, or oven control may be faulty.
If your oven is a convection oven, the automatic settings may be changing the set temperature by around 15 degrees for better convection cooking performance. Therefore, it is recommended to follow the recipe times, temperatures, and rack positions suggested in your oven manual. Additionally, ensure that heat circulation is not blocked by leaving enough space around the back sides of the oven shelf and avoiding covering the entire shelf with aluminium foil.
If the issue persists, you can attempt to calibrate the oven temperature. For the Bosch oven model HBL8451UC/0, press the "Settings" button, select option "9", and follow the instructions to change the default offset of 0ºF to -35ºF, which will calibrate the oven temperature 35 degrees lower.
For Bosch built-in oven Serie 8 HSG636ES1, a German video outlines the following steps to enter service mode: Turn off the oven, press and hold both the "i" and "hourglass" buttons, and then press the power button. Once in service mode, navigate using the ring and press the start button for calibration.
If your oven temperature is not reaching the set temperature, it could be due to a faulty oven sensor or relay control board. You can test the sensor by removing the thin metal rod attached to the back wall of the oven. There are two screws holding the sensor in place, which can be removed to disconnect it. Use a multimeter to check the resistance of the sensor at room temperature; it should be about 1080 ohms. If it is not within this range, replace the sensor. Otherwise, you may need to replace the relay control board.
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Calibrate the touchscreen
To calibrate the touchscreen of your Bosch oven, you will need to enter the service mode. This can be done by following the steps outlined below:
- Turn off the oven.
- Press and hold both the "i" and the hourglass buttons. You will hear a short click.
- When you hear the click, press the power button as well. This will make another click, and the oven will boot into service mode.
- Once in service mode, navigate using the ring and press the start button to begin calibration.
- Use the flat backend of a screw bit to calibrate the touchscreen.
- Only use light force when using your finger.
After calibration, you can test the buttons to ensure they are working correctly. Touch the number buttons on the touchscreen, then touch the red-lighted options until they all turn off. Then, click the jog shuttle a few times clockwise and a few times counterclockwise, followed by the start button and the on/off button. At the bottom right of the screen, it should say "Calibration finished" or something similar.
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Frequently asked questions
If your Bosch oven is not reaching the correct temperature, this could be due to a faulty oven sensor or a bad relay control board. You can test the sensor by removing it and checking the resistance with a multimeter. If the resistance is not about 1080 ohms, replace the sensor.
To calibrate your Bosch oven, you will need to adjust the temperature offset. Press the "Settings" button, select option "9", and follow the instructions to change the offset to the desired temperature.
If your oven temperature is off by more than 35 degrees Fahrenheit, the oven thermostat, oven sensor, or oven control may be faulty. Refer to your owner's manual for instructions on recalibration or contact Bosch Customer Support for assistance.
To enter calibration mode on a Bosch Serie 8 oven, turn off the oven and press and hold both the "i" and the "hourglass" buttons. Once you hear a click, press the power button. This will boot your oven into service mode. Use the selector ring to navigate and press the start button to initiate calibration.
