Whirlpool 4322452 manual 50 to 1100 Ω Amps

The Oven Ignitor is made of a silicon-carbide material (see Figure 4-13).

Oven Glo-Bar

Ignitor

Figure 4-13

When voltage is applied to the ignitor, it heats up to 2000˚F. As its temperature increases, its resistance decreases, allowing 2.5 to 3.0 amps to flow to the bimetal in the safety valve. This measurement is critical to the proper operation of the ignitor. In many cases, the ignitor can glow red, but not provide the proper amperage to the safety valve. At a room temperature of 75˚F, the resistance of the ignitor should be between 50 and 1100 Ω. At room temperature the ignitor can not provide enough amperage to properly operate the safety valve (see Figure 4-14).

Amperage = voltage divided by resistance (cold ignitor)

Amperage = 120 volts ⎟ 500 ohms

Amperage = .24

L1 50 to 1100 Ω .24 AMPS N

Thermostat	Oven Ignitor	Safety Valve
Switch Contacts			Bimetal

Figure 4-14

As the ignitor heats toward 2000˚F, its resistance drops to approximately 40 to 45 Ω, and can then operate the safety valve (see Figure 4-15).

Amperage = voltage divided by resistance (hot ignitor)

Amperage = 120 volts ⎟ 40 ohms

Amperage = 3.0

L1 50 to 1100 Ω 2.5 to 3.0 AMPS N

Thermostat	Oven Ignitor	Safety Valve
Switch Contacts			Bimetal

Figure 4-15

Page 4-8