Whirlpool Gas Cooktop Igniter Buzzing But No Spark:... | appliancefaults.com

Technical Background:

The cooktop's Main Control Unit (MCU) sends a 120V AC signal to the igniter module when a burner knob is turned on. The igniter module then steps up the voltage to several thousand volts and sends it to the spark electrode, creating a spark across the burner. If the voltage path is broken, the igniter will fail to spark. Buzzing indicates the module *may* be attempting to step up the voltage, but failing.

Symptoms:

The Whirlpool gas cooktop burner igniter emits a dull buzzing sound when the knob is turned, but no spark appears to ignite the gas.

Possible Causes:

Faulty igniter module
Clogged burner ports
Defective spark electrode
Open igniter switch
Wiring harness issue between module and electrode
Weak or failing MCU (Main Control Unit)

Solution:

1

Disconnect power to the cooktop at the breaker panel. Verify power is off using a non-contact voltage tester.
2

Inspect burner ports for debris. Clean with a small wire brush if necessary.
3

Check the spark electrode for cracks or damage. Replace if damaged.
4

Locate the igniter module, typically beneath the cooktop. Use a 1/4-inch nut driver to remove any access panels.
5

Using a multimeter, test the igniter module's output voltage while attempting to ignite a burner. You should see approximately 3-4 kV AC.
6

If no voltage is present, test the input voltage to the igniter module. It should be 120V AC.
7

If the input voltage is present but the output is not, replace the igniter module. If the input voltage is absent, trace the wiring back to the MCU or igniter switch and repair any breaks.

Safety Warning:

Disconnect power to the appliance before performing any repairs. Lock Out / Tag Out (LOTO) the breaker panel to prevent accidental power-up. High voltage is present in the igniter system; use caution when testing.

Prevention:

Regularly clean burner ports to prevent clogging. Avoid using excessive force when cleaning around the spark electrode.

Expert Tip:

Many Whirlpool cooktops have a service mode that can be accessed by pressing and holding specific burner knobs while powering up the unit. Consult the service manual for the exact sequence; this mode may provide error codes related to the ignition system.

Frequently Asked Questions

•How do I access the igniter module on my cooktop?

The igniter module is typically located beneath the cooktop surface. You may need to remove the burner grates and burner caps, then lift the cooktop surface to access the module. Some models may require removing screws from the underside of the cooktop frame.

•What type of multimeter should I use to test the igniter module?

Use a digital multimeter (DMM) that is capable of measuring both AC and DC voltage. Make sure the multimeter is rated for at least 600V AC to safely measure the input voltage to the igniter module.

•How do I test the igniter switch?

After disconnecting power, use a multimeter to check for continuity across the igniter switch terminals when the burner knob is turned on. If there is no continuity, the switch is faulty and should be replaced.

Whirlpool Gas Cooktop Igniter Buzzing But No Spark: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the igniter module on my cooktop?

•What type of multimeter should I use to test the igniter module?

•How do I test the igniter switch?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: