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Performance Analysis

Site Speed Report

Prototype vs. Projected React Build

This Page Loaded In
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seconds (HTML prototype)
Projected React Load
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seconds (estimated)
Estimated Improvement
Calculating...
faster load with React + code splitting + image optimization
JSON-LD Schema

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What improves in the React build (all else equal):
  • Code splitting — only the current page's JS is loaded
  • Image optimization — WebP conversion + lazy loading via React Image
  • CDN caching of static assets via Vercel/Netlify edge network
  • Tree-shaking removes unused CSS and JS from the bundle
  • Prefetching — next pages load before the user clicks

Developer note: Remove this banner and modal entirely from the React production build.

Same-day shipping on in-stock parts ordered by 3 pm CST Mon–Fri · Free diagnosis help: 817.472.7740

Home / Shop / Refrigerator Parts / ER 4389102 Ice Maker Optic Board for Refrigerator

ER 4389102 Ice Maker Optic Board for Refrigerator

Other · Refrigerator Parts

ER 4389102 Ice Maker Optic Board for Refrigerator

Part # b1da4bbd5a7cSold by U-FIX-IT Appliance Parts

$99.80

In stock
  • Ships same day if ordered by 3 pm CST Mon–Fri
  • 1-year replacement warranty unless stated on your receipt. Warranty & returns
  • Free pickup at Arlington, East Dallas, South Dallas or Tyler
  • Not sure it’s the right part? Free diagnosis help: 817.472.7740
  • Secure checkout

Complete the repair

Related parts from the same appliance. Ask us if you’re not sure you need them.

Total $178.28  

Part details

The ER 4389102 Ice Maker Optic Board for Refrigerator (part # b1da4bbd5a7c) is a refrigerator replacement part and replaces 4389102. $99.80 at U-FIX-IT.

Part #b1da4bbd5a7c
BrandOther
ApplianceRefrigerator Parts
Replaces4389102
Price$99.80
Availability6 in stock

ER 4389102 Ice Maker Optic Board for Refrigerator

Part No. ER 4389102

Part Purpose: Monitors the ice level in the ice bin and signals the ice maker to stop producing ice when the bin is full.

Part location on appliance: Located inside the freezer compartment, near the ice maker.

Part failure symptoms: Ice maker not producing ice, ice maker not stopping when the bin is full, or error codes related to the ice maker.

Part diagnosis: Inspect the optic board for visible damage or loose connections, test with a multimeter for proper function, or call the U-FIX-IT store for free diagnosis assistance.

Cross Reference Info: Replaces 4389102

What customers say about U-FIX-IT

Store reviews from ufixit.com. This part has no product reviews on the live site yet product reviews: none on live site

“Honestly I called to check and see if they had a part in stock, and didn’t even end up using them or buying from them, but was just generally impressed with the customer service that I received on the phone. The…”Kirby J · customer review on ufixit.com
“Came in to ask about a part for my washing machine and was assisted by this newer gentleman, Josue. He gave me some great tips for installing and now, thanks to this extremely helpful young man, my washing machine is…”Lisa Panelli-Valentin · customer review on ufixit.com
$99.80

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