Admiral Oven Not Heating Up But Broiler Works:... | appliancefaults.com

Technical Background:

The Admiral oven uses a Main Control Unit (MCU) to manage oven functions. The MCU receives input from the oven temperature sensor (RTD) and controls the heating elements via relays. Separate relays control the bake and broil elements. The bake element receives 240V AC during normal bake operation. The MCU logic determines when to energize these relays based on user input and sensor feedback.

Symptoms:

The Admiral oven does not heat up when set to bake. The broiler function, however, is working correctly.

Possible Causes:

Faulty bake element
Defective oven temperature sensor (RTD)
Failed oven relay on the control board (MCU)
Problem with the wiring harness connecting the bake element
Blown thermal fuse (though less likely with broiler working)
Malfunctioning oven control board (MCU)

Solution:

1

Disconnect power to the Admiral oven at the breaker panel. Lock Out/Tag Out (LOTO) is critical.
2

Locate the bake element at the bottom of the oven. Inspect for visible damage like breaks or blisters.
3

Using a multimeter, test the bake element for continuity. A reading of 20-50 ohms is typical. An open circuit indicates a failed element. Replace if needed.
4

Locate the oven temperature sensor (RTD), typically at the top rear of the oven cavity. Disconnect it and measure its resistance with a multimeter. It should read approximately 1000-1100 ohms at room temperature (70-75°F). Refer to the service manual for the exact resistance value at a known temperature. Replace if outside the specified range.
5

Check the oven relay on the control board (MCU). With the oven set to bake, carefully check for 120V AC at the bake element terminals using your multimeter. If voltage is present at the control board but not at the element, suspect a wiring issue. If no voltage is present at the control board when baking, the relay is likely faulty and the control board needs replacement.
6

Inspect the wiring harness connecting the bake element to the control board for any loose connections or burnt wires. Repair or replace as needed.
7

Reassemble the oven and restore power. Test the bake function to verify the repair.

Safety Warning:

Disconnect power to the appliance at the breaker panel before performing any repairs. Lock Out/Tag Out (LOTO) the breaker to prevent accidental re-energizing. High voltage is present in the oven circuitry and can cause serious injury or death.

Prevention:

Regularly clean the oven to prevent food buildup, which can lead to element overheating and premature failure. Avoid using abrasive cleaners on the temperature sensor.

Expert Tip:

Many Admiral ovens have a service mode that allows you to test individual components. Check the tech sheet usually located behind the lower access panel or online for the specific sequence to enter service mode for your model. This can aid in diagnostics without needing to fully disassemble the oven.

Frequently Asked Questions

•What is the correct resistance range for my specific Admiral oven temperature sensor at room temperature?

Refer to the service manual for your exact model. The resistance varies slightly depending on the model and manufacturer. Search online with the model number and "service manual" to find a downloadable copy.

•How do I access the control board (MCU) in my Admiral oven?

Usually, you can access the control board by removing the back panel of the oven or the top console. Disconnect power first. Screws typically hold the panels in place. Be careful not to damage any wires when removing the panels.

•Where can I purchase replacement parts for my Admiral oven, such as a bake element or temperature sensor?

You can purchase replacement parts from online appliance parts retailers like AppliancePartsPros.com, RepairClinic.com, or Sears PartsDirect. Be sure to have your model number handy to ensure you order the correct part.

Admiral Oven Not Heating Up But Broiler Works: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the correct resistance range for my specific Admiral oven temperature sensor at room temperature?

•How do I access the control board (MCU) in my Admiral oven?

•Where can I purchase replacement parts for my Admiral oven, such as a bake element or temperature sensor?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: