Whirlpool AccuBake Oven Temperature Too Low: Relay Board... | appliancefaults.com

Technical Background:

The Whirlpool AccuBake system uses an electronic oven control (EOC) which manages oven temperature. The EOC receives temperature data from the RTD sensor. When the oven is turned on, the EOC sends a signal to the oven relay board to energize the bake or broil element, as necessary. The relay board acts as a high-current switch. The MCU within the control board provides low voltage signals that trigger high voltage paths.

Symptoms:

The oven takes a long time to preheat, or the oven temperature is significantly lower than the set temperature. Food may not cook properly, or may take much longer than expected.

Possible Causes:

Faulty oven temperature sensor (RTD).
Defective oven relay board.
Calibration issues with the oven control board.
Wiring harness problems between the control board and heating element.
Weak bake or broil element.
Incorrect voltage supply to the oven.

Solution:

1

Disconnect power to the oven at the breaker panel.
2

Locate the oven relay board, typically behind the control panel or at the rear of the oven.
3

Using a multimeter, test the oven temperature sensor (RTD) for proper resistance. It should be around 1100 ohms at room temperature (70F).
4

Inspect the oven relay board for burned or damaged components.
5

With the power OFF, check the wiring harness connections to the relay board and heating element for continuity and proper connections.
6

If the wiring and sensor are OK, replace the oven relay board. Ensure you get the correct replacement part for your model.
7

After replacing the relay board, restore power and test the oven temperature using an oven thermometer. Calibrate the oven temperature if necessary, following the manufacturer's instructions.

Safety Warning:

Disconnect power to the oven at the breaker panel before performing any repairs. Lock-out/Tag-out (LOTO) procedures must be followed. High voltage (240V AC) is present in the oven wiring. Improper handling can result in serious injury or death.

Prevention:

Avoid using harsh oven cleaners that can damage the temperature sensor. Regularly check and clean the heating elements. Periodically check for loose wiring connections at the relay board.

Expert Tip:

Whirlpool AccuBake ovens often have a hidden service mode. Consult the service manual for your specific model. You can often access it by pressing a sequence of buttons like “Cancel-Cancel-Start”. This mode allows you to run diagnostic tests and calibrate the oven temperature.

Frequently Asked Questions

•How do I calibrate the oven temperature on my Whirlpool AccuBake?

Calibration steps vary by model. Refer to your owner's manual or the service manual. Generally, you'll enter a service mode and adjust an offset value (in degrees Fahrenheit) to compensate for temperature differences.

•What is the correct resistance range for the RTD oven temperature sensor?

Typically, the resistance is around 1100 ohms at room temperature (70°F). This value increases as the temperature rises. Consult the service manual for your specific model.

•How do I test the oven heating element?

Disconnect power to the oven. Disconnect the element wires. Using a multimeter set to ohms, test for continuity across the element terminals. A reading of approximately 20-40 ohms indicates a good element. Also, check for continuity from each terminal to the element housing. If there is continuity, the element is shorted and needs to be replaced.

Whirlpool AccuBake Oven Temperature Too Low: Relay Board Testing Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I calibrate the oven temperature on my Whirlpool AccuBake?

•What is the correct resistance range for the RTD oven temperature sensor?

•How do I test the oven heating element?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: