Bosch Appliances NGM manual Maintenance, Before Calling for Service, Troubleshooting Chart

Cooktop Part / Material	Suggested Cleaners	Important Reminders
Grates and Grate Bridge	• Nonabrasive cleaners: Hot water	• The grates are heavy; use care
Porcelain Enamel on Cast Iron	and detergent, Fantastic®,	when lifting. Place on a protected
	Formula 409®. Rinse and dry	surface for cleaning.
	immediately.	• Blisters/ crazing/ chips are
	• Mild abrasive cleaners: Bon Ami®	common due to the extreme
	and Soft Scrub®.	temperatures on grate fingers and
	• Abrasive cleaners for stubborn	rapid temperature changes.
	stains: soap-filled steel wool pad.	• Acidic and sugar-laden spills
		deteriorate the enamel. Remove
		soil immediately.
		• Abrasive cleaners, used too
		vigorously or too often can
		eventually mar the enamel.
		• Do not clean in a self-clean oven.
Igniters	• Carefully wipe with a cotton swab	• Avoid excess water on the igniter.
Ceramic	dampened with water, ammonia	A damp igniter will prevent burner
	or Formula 409®.	from lighting.
	• Gently scrape soil off with a	• Remove any lint that may remain
	toothpick.	after cleaning.
Maintenance	instructions.
	“Cleaning and Maintenance” on page 12 for detailed

The appliance requires only regular cleaning for proper operation. No other maintenance is required. See

Service

Before Calling for Service

Troubleshooting Chart

Problem	Suggestion
Burner(s) do not light / Ignitors do not	• Make sure that the gas shut off valve is in the ON position and the gas
spark	supply to the house is not shut off.
	• Make sure the burner caps are properly positioned and the burner
	ports are not clogged. Clear ports with a wire or straightened paper clip
	if clogged.
	• Make sure the igniters are clean and dry.
	• Check the power supply. It should be properly grounded with the
	correct polarity. Make sure the unit is plugged in and the circuit breaker
	is not tripped.
Burner flame goes out unexpectedly	• Make sure that there is no draft in the room.
Ignitors spark even though knobs are in	• When the electrical power connection has been activated at the first
the off position	power up or reconnected after an outage, the igniters may spark once
	or twice even though all burner knobs are in the off position.
English 14