Wolf Gas Range Broiler Won't Stay Lit: Troubleshooting... | appliancefaults.com

Technical Background:

Wolf gas ranges use a flame rectification system. The oven control module (MCU) sends AC voltage to the igniter to heat it up. Once the igniter is hot enough, the gas valve opens. The igniter ignites the gas. A flame sensor (thermocouple or flame rod) senses the flame and sends a DC millivolt signal back to the MCU. This signal tells the MCU that the flame is present and to keep the gas valve open. If the flame signal is lost, the MCU will shut off the gas valve.

Symptoms:

The homeowner observes that the broiler ignites initially, but the flame does not stay lit during continued use. The broiler may light, and then after a few seconds, the flame goes out.

Possible Causes:

Faulty flame sensor (thermocouple or flame rod)
Weak or failing igniter (glow bar)
Insufficient gas pressure to the broiler
Defective gas valve (broiler valve)
Issues with the oven control board (MCU)
Blocked or dirty broiler burner ports

Solution:

1

Disconnect power to the range at the breaker panel. Verify 0V AC at the range outlet using a multimeter.
2

Locate the flame sensor (thermocouple or flame rod) near the broiler burner. Visually inspect for damage or carbon buildup. Clean gently with fine steel wool.
3

Test the flame sensor with a multimeter. Heat the tip with a lighter. A good thermocouple should generate a DC millivolt reading (typically 20-30 mV DC). If the reading is low or nonexistent, replace the flame sensor.
4

Inspect the igniter for cracks or damage. Measure the igniter resistance with a multimeter. Resistance should typically be between 40-400 ohms. If open circuit or significantly out of range, replace the igniter.
5

Check the gas pressure regulator. A manometer can be used to verify proper gas pressure (typically around 4-inches water column for natural gas, 11-inches water column for propane).
6

Verify the broiler gas valve is opening fully when the broiler is activated. Use a multimeter to check for 120V AC at the valve terminals during broiler operation. If no voltage is present, the issue might be the oven control board.
7

Inspect the broiler burner ports for blockage. Clean with a small brush or wire. Reassemble and test the broiler operation.

Safety Warning:

Lock Out/Tag Out (LOTO) the breaker before working on the range. High voltage (120V AC) is present in the control circuit. Gas leaks can cause explosions. If you smell gas, immediately evacuate the area and call your gas company.

Prevention:

Regularly clean the broiler burner and surrounding area to prevent debris buildup. Periodically inspect the flame sensor and igniter for signs of wear or damage. A yearly licensed technician service call is recommended.

Expert Tip:

Some Wolf ranges have a hidden service mode. Accessing this mode will display error codes and allow for component testing. The specific sequence to enter service mode is model-dependent. Consult the service manual for your range.

Frequently Asked Questions

•What is the typical lifespan of a flame sensor in a Wolf gas range?

The lifespan of a flame sensor can vary depending on usage and environment, but typically it lasts between 3-7 years. Regular cleaning and inspection can extend its lifespan.

•How do I access the broiler burner assembly to inspect it?

Accessing the broiler burner usually involves removing the broiler drawer (if equipped) and any internal panels or shields. Refer to your owner's manual or a service manual for specific instructions and diagrams for your model.

•If the flame sensor is good and the igniter glows brightly, what else could be causing the flame to go out?

If both the flame sensor and igniter appear to be functioning correctly, the issue could be related to gas pressure, a partially blocked gas valve, or a problem with the oven control board not properly regulating the gas flow. You may also want to check the burner itself for debris.

Wolf Gas Range Broiler Won't Stay Lit: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical lifespan of a flame sensor in a Wolf gas range?

•How do I access the broiler burner assembly to inspect it?

•If the flame sensor is good and the igniter glows brightly, what else could be causing the flame to go out?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: