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Customer Questions and Answers for Microwave High Voltage Diode Wire by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM18036198
Manufacturer Part Number: WP8205489

This is a high voltage diode wire assembly used in the microwave's power circuit. It works with the capacitor and magnetron to convert electrical current and generate microwave energy for cooking. Replace this part if the microwave runs but does not heat, or if the diode has visibly burned or shorted out.

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Questions & Answers

For Whirlpool Microwave High Voltage Diode Wire (Part Number: OEM18036198)

1 Answer

Hello Steven. You most likely have a "high voltage" side malfunction. Transformer, diode, magnetron, Capacitor. You will need to be extremely careful if you decide to test the components with a multi meter, Very high residual voltage is present, so make sure you remove power to the microwave and short across the terminals on the capacitor. The magnetron should have a reading of less than 1 ohm resistance across the two terminals, and an "open" circuit between each terminal and chassis ground. The diode/rectifier should have a resistance reading in one direction only, no resistance, or resistance in both directions indicate a faulty diode. The primary winding on the trans former should read approximately 450 Ohms resistance, the secondary winding should read 80 ohms resistance, and the filament transformer should read 100 ohms resistance. If all the readings are proper and in range, replace the magnetron.

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1 Answer

Hello Clifford, This will be a bad relay on the control board 8183756 and it will need to be replaced to correct the issue.

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1 Answer

IIProbe, You will want to check the ceramic fuse and all thermal cutoffs for continuity. If there is no continuity then the part will need to be replaced.

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Jim for Model Number Whirlpool Gold Microwave GT4185SKB3

We have a Whirlpool Gold built-in microwave model #GT4185SKB-3. We have not had one single problem in 10 years! Well, yesterday it suddenly stopped working midway through a cycle. Dead. The display is lit and working, but when we press 'start' the interior light comes on and the timer starts to count down BUT the microwave will not run at all. It is silent. What part could this be that has suddenly failed with no warning? Thanks!

1 Answer

Hello Khanh. You most likely have a "high voltage" side malfunction. Transformer, diode, magnetron, Capacitor. You will need to be extremely careful if you decide to test the components with a multi meter, Very high residual voltage is present, so make sure you remove power to the microwave and short across the terminals on the capacitor. The magnetron should have a reading of less than 1 ohm resistance across the two terminals, and an "open" circuit between each terminal and chassis ground. The diode/rectifier should have a resistance reading in one direction only, no resistance, or resistance in both directions indicate a faulty diode. The primary winding on the trans former should read approximately 450 Ohms resistance, the secondary winding should read 80 ohms resistance, and the filament transformer should read 100 ohms resistance. If all the readings are proper and in range, replace the magnetron.

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1 Answer

Hello Jojo. It sounds like the control board is bad. As for the heating issue, it could be the magnetron or the HV transformer. The control board 8184747 has been permanently discontinued by the manufacturer and we don't know of any source or replacement for the part.

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