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Customer Questions and Answers for Microwave High Voltage Capacitor by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM17997573
Manufacturer Part Number: W10850446

Microwave not heating or making loud humming noise? The high-voltage capacitor supplies power to the magnetron. DIY repair in under an hour.

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Questions & Answers

For Whirlpool Microwave High Voltage Capacitor (Part Number: OEM17997573)

Janine for Model Number Jenn-Air Microwave (30+ years old but appears new)

We experienced a costly power surge due to a loose ground wire at the meter and as a result lost several tv's dvd players, radios and the microwave. How can I tell what part I need to remedy the problem. There is absolutely no "life" in the unit. Hopefully, replacing the fuse will do it. Electric company claims no liability so the cost of repair is on me. The microwave matches the oven so hopefully I can repair the unit. The oven escaped damage.

1 Answer

Hello Janine, in that case the control board would have been damaged. If you will supply the model number we can then check if the control board is still available.

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1 Answer

Hello Patricia, the manufacturer has an interlock switch kit for this problem, part W11244490. It replaces all interlock switches and cams.

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1 Answer

Dewayne, If the display is working but will not respond then this would most likely be caused by a faulty touchpad. If there is no display then you will want to check the other thermal cutofffs in the microwave to make sure that they have continuity.

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1 Answer

Tom, The HV capacitor would have no bearing on the fan motor. This will most likely be a faulty fan motor. Check the motor to make sure that it is getting 120 vac to it and if it is then the fan motor will need replaced.

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1 Answer

Hello John. White goes to one side from the transformer. Then black, red, and the diode goes to the other side.

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1 Answer

Maw, Normally with an issue of a microwave not heating would be caused by a faulty magnetron. You will want to test the magnetron which should have <1 ohms of resistance. If the magnetron reads more than that or open then the magnetron would need to be replaced.

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1 Answer

Ray, It is recommended to install a new HV Capacitor and diode on the unit instead of a used one. The part number for the diode is W10850446 and the capacitor is W11256462.

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