Many modern gas stoves, ovens, furnaces, and other similar appliances use an electronic ignition rather than a continuously burning pilot flame to ignite the fuel. These are actually simple high voltage pulse generators.
Where starting is manual (there is a 'start' position on the control(s), a set of switch contacts on the control(s) provides power to the ignition module.
A problem of no spark with only one control indicates that the fault is with it or its wiring.
A problem with continuous sparking even with all the controls off or in their normal positions indicates a short - either due to a defective switch in one of the controls or contamination bypassing the switch contacts.
Where starting is automatic, an electronic sensor, thermocouple, or bimetal switch provides power to the ignition module as needed.
The Harper-Wyman Model 6520 Kool Lite(tm) module is typical of those found in Jenne-Aire and similar cook-tops. Input is 115 VAC, 4 mA, 50/60 Hz AC. C1 and D1 form a half wave doubler resulting in 60 Hz pulses with a peak of about 300 V and at point A and charges C2 to about 300 V through D2. R2, C3, and DL1 form a relaxation oscillator triggering SCR1 to dump the charge built up on C2 into T1 with a repetition rate of about 2 Hz. C1 A D1 T1 o H o----||----------------+-------|>|-------+-------+ +-----o HVP+ .1 uF D2 1N4007 | 1N4007 | | o ::( 250 V +----|>|----+ | +--+ ::( | | | )::( +---/\/\----+ | #20 )::( 1:35 | R1 1M | C2 _|_ )::( | R2 / 1 uF --- +--+ ::( | 18M \ DL1 400 V | __|__ ::( | / NE-2 | _\_/_ +-----o HVP- | | +--+ | / | | +----|oo|----+---------' | SCR1 | C3 | +--+ | | | S316A | .047 uF _|_ R3 / | | 400 V | 250 V --- 180 \ | | 1 A | | / | | R4 2.7K | | | | | N o---/\/\---+-----------+------------+----+-------+
Answers & Comments
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Many modern gas stoves, ovens, furnaces, and other similar appliances use an electronic ignition rather than a continuously burning pilot flame to ignite the fuel. These are actually simple high voltage pulse generators.
- Where starting is manual (there is a 'start' position on the control(s), a set of switch contacts on the control(s) provides power to the ignition module.
- A problem of no spark with only one control indicates that the fault is with it or its wiring.
- A problem with continuous sparking even with all the controls off or in their normal positions indicates a short - either due to a defective switch in one of the controls or contamination bypassing the switch contacts.
- Where starting is automatic, an electronic sensor, thermocouple, or bimetal switch provides power to the ignition module as needed.
The Harper-Wyman Model 6520 Kool Lite(tm) module is typical of those found in Jenne-Aire and similar cook-tops. Input is 115 VAC, 4 mA, 50/60 Hz AC. C1 and D1 form a half wave doubler resulting in 60 Hz pulses with a peak of about 300 V and at point A and charges C2 to about 300 V through D2. R2, C3, and DL1 form a relaxation oscillator triggering SCR1 to dump the charge built up on C2 into T1 with a repetition rate of about 2 Hz. C1 A D1 T1 o H o----||----------------+-------|>|-------+-------+ +-----o HVP+ .1 uF D2 1N4007 | 1N4007 | | o ::( 250 V +----|>|----+ | +--+ ::( | | | )::( +---/\/\----+ | #20 )::( 1:35 | R1 1M | C2 _|_ )::( | R2 / 1 uF --- +--+ ::( | 18M \ DL1 400 V | __|__ ::( | / NE-2 | _\_/_ +-----o HVP- | | +--+ | / | | +----|oo|----+---------' | SCR1 | C3 | +--+ | | | S316A | .047 uF _|_ R3 / | | 400 V | 250 V --- 180 \ | | 1 A | | / | | R4 2.7K | | | | | N o---/\/\---+-----------+------------+----+-------+
Please specify the name and manufacturer of the product ..
Do you have a model number for the oven and what make and model?
What does this "motor" do? Ventilation?