Whirlpool AccuBake Oven: Temperature Probe vs Infrared... | appliancefaults.com

Technical Background:

The Whirlpool AccuBake system relies on an oven temperature probe (typically an RTD or Thermistor) to provide temperature feedback to the main control unit (MCU). The MCU uses this information to regulate the heating element and maintain the set oven temperature. A voltage divider circuit provides an input to the MCU from the RTD/Thermistor. Deviations from the expected voltage range trigger error conditions or temperature discrepancies.

Symptoms:

The oven temperature as displayed on the control panel is significantly different than the actual temperature measured with an infrared thermometer. The oven may take too long to preheat or may not reach the set temperature. Food may be undercooked or overcooked.

Possible Causes:

Faulty oven temperature probe (RTD or Thermistor).
Defective oven control board (MCU).
Loose or corroded wiring connections to the probe or control board.
Incorrect oven temperature calibration.
Failing heating element.
Incorrect voltage supply to MCU.

Solution:

1

Disconnect power to the oven at the breaker panel. Verify zero voltage with a multimeter.
2

Locate the oven temperature probe inside the oven cavity. It's typically near the top.
3

Disconnect the probe wires from the oven control board. Often located behind the control panel.
4

Using a multimeter, measure the resistance of the probe at room temperature (approx. 70-75°F). Refer to the Whirlpool AccuBake service manual for the expected resistance value (typically around 1080-1090 ohms at room temperature).
5

If the resistance is significantly different than the specification, replace the oven temperature probe. Use a 1/4-inch nut driver to remove the probe.
6

Inspect the wiring connections at the control board. Look for corrosion or loose connections. Clean or tighten as needed.
7

If the probe resistance is within specification and the wiring is good, suspect a faulty oven control board. Replacement of the control board may be necessary. This is best left to a qualified technician.

Safety Warning:

Disconnect power to the oven at the breaker panel before performing any repairs. Lock Out/Tag Out (LOTO) procedures should be followed. High voltage (120V AC or 240V AC) is present in the oven. Do not touch any electrical components with wet hands.

Prevention:

Avoid placing aluminum foil or oven liners directly on the oven floor, as this can interfere with temperature sensing and air circulation. Clean the oven regularly to prevent grease buildup. Periodically check the oven temperature with an external thermometer.

Expert Tip:

Many Whirlpool AccuBake ovens have a service mode that allows you to recalibrate the oven temperature. Consult the service manual for instructions on entering the service mode and adjusting the temperature offset. This can often correct minor temperature inaccuracies.

Frequently Asked Questions

•What is the typical lifespan of an oven temperature probe?

Oven temperature probes typically last 5-10 years, depending on usage and environmental factors. High oven temperatures and frequent use can shorten their lifespan.

•How do I access the oven control board on my Whirlpool AccuBake oven?

The oven control board is usually located behind the control panel. You will typically need to remove screws from the top or front of the control panel to access it. Be sure to disconnect power before attempting to access the control board.

•Can I use a generic temperature probe instead of a Whirlpool-branded one?

It is generally recommended to use a Whirlpool-branded temperature probe to ensure compatibility and accurate temperature readings. Generic probes may have different resistance characteristics that could lead to inaccurate temperature control.

Whirlpool AccuBake Oven: Temperature Probe vs Infrared Thermometer Test

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical lifespan of an oven temperature probe?

•How do I access the oven control board on my Whirlpool AccuBake oven?

•Can I use a generic temperature probe instead of a Whirlpool-branded one?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: