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The Rinnai 431F-1420 is a thermal fuse designed for use in Rinnai tankless water heaters. This part, known as the REAR harness, is essential for maintaining the safety and function of the unit. It protects the system against overheating by interrupting the electrical flow when temperatures exceed safe limits.
This thermal fuse plays a critical role in maintaining the performance and safety of your water heating system.
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