Bradford White is a household name renowned for manufacturing top-quality water heaters for their durability and reliability. If you own a Bradford White Water Heater Model MI403S6FBN and need to replace some parts, or if it’s not working right, you’re in the right place. This blog will give you lots of information about MI403S6FBN water heaters. We’ll talk about the parts they have, how to fix them, and what common problems you might face with this kind of gas water heater. We’ll also help you choose where to buy the needed parts, comparing two popular options: Amazon and Home Depot.

MI403S6FBN Parts & Water Heater Model Repair Help and Bradford White

Whether you’re knee-deep in a repair project or want to keep your water heater in top-notch condition, acquiring the right parts is essential. Bradford White stands by its MI403S6FBN customers, offering comprehensive support for those in of replacement components. Here’s how you can navigate the path to successful repairs:

1. Part Selection:

 You can easily find the exact part your MI403S6FBN water heater needs by Filtering your search results by part category.

2. Part Title: 

Find the specific part you’re looking for by searching for it using its name, ensuring precision in your repairs.

3. Symptom-Based Assistance: 

Bradford White provides a symptom-based search feature, enabling you to identify the issue you’re experiencing with your water heater. The system can then suggest relevant parts and repair solutions tailored to your problem.

4. Diagrams and Manuals:

 Access MI403S6FBN parts diagrams and user manuals to assist you in the repair process, making it easier to visualize and execute your maintenance tasks.

5. Video Guides: 

Visual learners fear not! Bradford White offers related video guides that can walk you through the repair or maintenance procedures step by step, making it accessible even for those new to DIY repairs.

6. Common Problems:

Get insight into known issues associated with the MI403S6FBN water heater, helping you identify if your problem is recurring.

Please get in touch with Bradford White’s customer service if you require additional assistance or have questions. They are available 24/7 via phone at 1-800-269-2609 or through the live chat feature on their website, ensuring you have expert guidance at your fingertips whenever you need it.

Bradford White MI403S6FBN Problems & Repair Solutions

Over the years, Bradford White has learned much about common problems encountered by MI403S6FBN gas water heater owners. Here are some crucial issues to keep in mind:

1. Pilot Light Failure:

 If your pilot light keeps turning itself off, culprits may include a faulty thermocouple or problems with the gas supply. The solution often involves replacing the thermocouple or ensuring proper gas flow.

2. No Hot Water: 

A malfunctioning thermostat or heating element could cause a sudden loss of hot water. You may need to replace these components to restore your water heater’s functionality.

3. Strange Noises: 

Unusual noises from your water heater may indicate sediment buildup in the tank. A simple tank flush and cleaning of the burner assembly can often solve the problem, restoring peace to your home.

4. Leaking Water:

 Water heater leaks can occur from various sources, such as faulty relief valves, compromised tanks, or loose connections. Accurately identifying the origin of the leak is critical to effective repair.

5. Rusty Water:

 Rusty or discolored water flowing from your faucets can indicate corrosion inside the tank. In such cases, it is advisable to consult a professional for a thorough diagnosis, which may result in a tank replacement.

Exploring MI403S6FBN Replacement Parts

You may need to replace certain parts to fix these problems and ensure your water heater functions optimally. Here is a selection of the main replacement parts available for the MI403S6FBN model:

  • Thermocouple: For issues with the pilot light staying lit.
  • Pilot Assembly: Includes pilot, spark igniter, and thermocouple for proper ignition.
  • Anode Rod: Essential for protecting the water heater tank from corrosion.
  • Temperature and Pressure Relief Valve: Prevents excessive pressure and temperature buildup.
  • Gas Burner: Ensures efficient heating of your water.
  • Hose Connector: Regulates heat flow effectively.
  • Gas Valve Assembly: Controls gas flow to the burner, a critical component.

Buying Options: Amazon vs. Home Depot

You have multiple options when purchasing replacement parts for your MI403S6FBN water heater. Two of the most popular choices are Amazon and Home Depot. Let’s compare these options to help you determine the best fit for your needs:



  •  Vast Selection: Amazon offers various replacement parts with multiple brands and price points.
  •  Convenience: Shop from your home and enjoy quick delivery options.
  •  Customer Reviews: Access customer reviews and ratings to make informed decisions.


  • Limited Product Information: Some third-party sellers may need to offer complete product details.
  • Shipping Costs: Depending on your location and Amazon Prime membership, shipping costs may apply.

Home Depot


  • In-Store Assistance: Visit a Home Depot store for in-person guidance and advice from knowledgeable staff.
  • Warranty and Return Policy: Home Depot often provides explicit product warranty and return policies.


  •    Limited Selection: Home Depot may offer a more limited selection than Amazon.
  •    In-Store Visits: Home Depot’s physical stores may be less convenient if you prefer online shopping.


To maintain a continuous hot water supply, you must equip your MI403S6FBN gas water heater with authentic replacement parts. With access to a wide range of features, helpful guides, and expert customer support, you can tackle common problems and extend the life of your water heater. When shopping for replacement parts, carefully consider your unique needs and whether Amazon or Home Depot fits your preferences better. Regular maintenance and timely repairs save you money and guarantee that your water heater will provide many years of reliable service.

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