Roper Range Oven Igniter Slow to Light: Troubleshooting... | appliancefaults.com

Technical Background:

The Roper range uses a 120V AC hot surface igniter. When the oven is turned on, the oven control board (MCU) sends voltage to the igniter. As the igniter heats, its resistance drops, drawing more amperage. When the amperage reaches a specific threshold (typically 3.2-3.6 amps), the MCU opens the gas valve. A weak igniter will not draw sufficient amperage, delaying the gas valve opening. The oven temperature sensor also plays a role in monitoring the oven temperature and telling the board when the temperature is reached to start the ignition sequence.

Symptoms:

The homeowner observes that the oven igniter takes approximately 2 minutes to light the gas burner. This is significantly longer than the typical 5-10 seconds. The user suspects the igniter is failing.

Possible Causes:

Weak igniter failing to draw sufficient amperage.
Partially blocked gas supply to the burner.
Faulty oven temperature sensor affecting ignition timing.
Defective oven control board (MCU) not providing proper voltage.
Incorrect gas pressure at the supply regulator.
Loose or corroded wiring connections in the ignition circuit.

Solution:

1

Turn off the gas supply to the range at the shut-off valve behind the unit.
2

Disconnect power to the range at the breaker panel. Lock Out/Tag Out (LOTO) procedure.
3

Remove the oven racks and bottom panel to access the burner and igniter assembly.
4

Visually inspect the igniter for cracks or damage. Use a multimeter to test igniter resistance (should be around 100-400 ohms). If open circuit, replace igniter.
5

Check the gas supply line and burner ports for any obstructions. Clean with a wire brush.
6

Use a manometer to check the gas pressure at the burner (typically 3.5-4.5 inches of water column for natural gas). Adjust the gas regulator if necessary.
7

Reassemble the range and reconnect the power. Test the oven's ignition sequence.

Safety Warning:

Always disconnect power and gas before performing any repairs. Use proper Lock Out/Tag Out (LOTO) procedures to prevent accidental energizing. This range operates on 120V AC, which can cause serious injury or death.

Prevention:

Periodically clean the burner assembly to prevent gas flow obstructions. Inspect the igniter for damage during annual maintenance. Ensure proper gas pressure at the supply regulator.

Expert Tip:

Many Roper ranges have a hidden service mode. Typically, pressing and holding the 'Bake' and 'Broil' buttons simultaneously for 3 seconds will enter the service mode. This will show error codes and component test functions. Check the tech sheet behind the lower panel for specific entry procedures.

Frequently Asked Questions

•What is the correct amperage draw for the igniter on my specific Roper range model?

Check the range's tech sheet (usually located behind the lower access panel) for the specified amperage draw. General ranges are around 3.2-3.6 amps, but refer to the OEM documentation for your model number.

•How do I adjust the gas pressure regulator on my Roper range?

The gas pressure regulator is usually located near the gas inlet. To adjust, remove the cap and use a screwdriver to turn the adjustment screw. Turn clockwise to increase pressure and counterclockwise to decrease pressure. Monitor the gas pressure with a manometer during adjustment to ensure the correct setting (typically 3.5-4.5 inches water column for natural gas, 10 inches for LP).

•Where can I find the tech sheet for my specific Roper range model?

The tech sheet is often found folded and tucked behind the lower access panel or attached to the back panel of the range. It contains wiring diagrams, troubleshooting steps, and component specifications specific to your model number.

Roper Range Oven Igniter Slow to Light: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the correct amperage draw for the igniter on my specific Roper range model?

•How do I adjust the gas pressure regulator on my Roper range?

•Where can I find the tech sheet for my specific Roper range model?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: