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Customer Questions and Answers for Gas Cooktop Switch Harness by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM18028536
Manufacturer Part Number: WP4456901

Fix sparking or non-working igniter switches with a new switch harness. Connects control switches to cooktop wiring. Moderate DIY repair, 1-2 hours.

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Questions & Answers

For Whirlpool Gas Cooktop Switch Harness (Part Number: OEM18028536)

1 Answer

Debbie, a pair of needle-nose pliers can be used to grip just where the flat part starts to become widest as there is likely a push tab at this spot. The pliers will help to push it down so that it can be pulled away.

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1 Answer

Suzie. Thanks for the question!!! Yes, the burners need to be removed. After the burner caps are lifted off, there will be two screws holdings the burner down. The cooktop will also need to be lifted from the counter to give access to screws in the front and rear of the unit that hold the glass on.

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1 Answer

Ethan, You will need to check for a good solid ground and polarity at the wall outlet, Then check the gas valve ignition switch circuit(s) . They should all have an "open" circuit, when the knob(s) are in the "OFF" position. Reversed polarity and a weak or intermittent earth ground can cause the spark module to maintain a "charge" and arc the igniters even in the OFF position.

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Cj for Model Number GLT3657RB05

As soon as the ignitor is plugged into the electrical outlet it trips the breaker. Opened up the Glass top to look underneath and it appears one of the ignitor switches is shorted (slightly burnt). it emits a spark and pop when plugged into the electric outlet, immediately tripping breaker. Do i just need to replace the switch or also the spark module? If i buy part 4456901 how easy is it to replace it? I tried to pull out the cables for the existing part but it seemed difficult to extract from the positive terminal. The switch itself just popped out easily. thanks. CJ

1 Answer

CJ, The issue with the harness being burnt could cause the breaker to trip if it is shorting to ground. You would just need to replace the switch harness which has the switches on it.

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1 Answer

John, Yes the glass cooktop can be removed after the control knobs and the burner base screws are removed. Remember to label the location of the burner caps and bases before you remove them, it makes it a lot easier to reconstruct the cooktop, if you do. It's also a good idea to remove the drip pans under the burner bases as well, it'll give you better leverage and room to remove the glass top ( the glass panel can "stick" to the burner box frame and is a little difficult to remove).

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1 Answer

Hello Chris, To remove the cooktop, 1. Turn off the gas supply and electrical power to the cooktop. 2. Remove the grates and burner caps. 3. Remove the knobs from the controls. 4. Remove all of the burner bases. To remove a burner base, remove the two screws, and lift it off the drip pan. 5. Lift the maintop off the countertop. NOTE: If you are replacing the maintop, unclip the control bezels from the mounting holes, otherwise leave them installed.

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1 Answer

Hi George . On the wiring harness with switches part # is WP4456901, there are switch holding locator pins on the back of each switch. You can use a small straight blade to push out on the back of the body to release from the valve body. Then you can pull off the switches from the valve stems. Use the ceramic wire nuts to hook into the original harness. Thank you.

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