See part 4 in the diagram
Transformer
The W10329903 is a transformer for Whirlpool microwave. Basic tools needed. Compare prices from top sellers.
Replaces: 1877478
Moderate Repair
Fits Maytag appliances
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3 stores · Updated May 16, 2026
Lowest$173.95
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$194.23
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$218.41
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Common Problems This Part Fixes
Not heating
Trips breaker or blows fuse
Repair difficulty: Moderate - basic tools and 1-2 panels to remove
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