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Customer Questions and Answers for Electric Range Oven Thermostat by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM18033360
Manufacturer Part Number: WP74009277

Oven won't turn off or stays on low heat? This temperature-sensing thermostat regulates oven heat and prevents overheating. Moderate DIY repair.

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Questions & Answers

For Whirlpool Electric Range Oven Thermostat (Part Number: OEM18033360)

1 Answer

Mike, the thermostat used will depend on the series of your model. If the serial number starts with 10 to 18, then the thermostat needed is part number WP74003267. If the serial number starts with 19 or higher, the thermostat WP74009277 is used. If the serial number is 19 or higher, (wit the power cord unplugged from the wall outlet) the wiring would need to be inspected to ensure there are no loose connections or broken wires. The last item would be testing the switch for continuity from L1 to H when in the on position. Then from terminal 4 to BK when set to bake, and 4 to Br when in the broil position. If there is not continuity when set accordingly, the thermostat is bad and would need to be replaced.

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1 Answer

Mary,

On the white part of the new thermostat you will have a single black and double black wire. The single black wire which is from the power supply L1 will go to the end where the thermostat probe comes off. The double black will go at the opposite end. On the 2 switches you have one that has 2 connectors. On that switch the silver connector will have the single red wire and the double red will go on the brass looking connector of the 2 connector switch. On the other connector there are 3 terminals. The other single black wire which comes off the double black will go on the silver looking terminal. The tricky part will be the blue and yellow wire. This may take putting the wires on each connector and see which element comes on when put on bake and broil. It should be the blue for broil closest to the black wire and the yellow to the other terminal. This part may require reversing those 2 wires.

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1 Answer

Hello Clyde, depending on the first two digits on your serial number will determine which thermostat is correct for your unit. If your first two digits are from 10-15 you will use WP74003267 and from 16 to above it will be WP74009277. Thanks!

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