Weil-mclain 383500240 Control Model Fuses F3 4-amp Fast-blow 5-pack Ultra Gas Boiler

Product Description

The Weil-McLain 383500240 is a pack of five F3 control model fuses designed for use with Weil-McLain Ultra Gas Boilers. Each fuse is rated at 4 amps and uses a fast-blow design, which means it opens the circuit immediately when an overload or short circuit occurs. This fast response helps protect sensitive control board components from damage caused by electrical faults. HVAC technicians and boiler service professionals rely on properly rated fuses to keep heating system controls operating safely and within spec. Installing the wrong fuse type or amperage can cause control board failures or create unsafe conditions, so using the exact OEM-specified replacement fuse is critical. The 383500240 fuse pack matches the factory specification for the F3 fuse position on the Weil-McLain Ultra series boiler control board. The Ultra Gas Boiler is a high-efficiency condensing boiler widely used in residential and light commercial heating applications. Its control board manages ignition sequencing, burner operation, temperature regulation, and safety lockouts. Keeping the correct replacement fuses on hand reduces downtime during service calls and helps technicians complete repairs in a single visit. This 5-pack format is practical for service contractors who may encounter the same boiler model across multiple job sites. Whether you are performing routine maintenance, diagnosing a no-heat call, or replacing a blown fuse after a fault event, the Weil-McLain 383500240 provides the exact fast-blow 4-amp fuse your Weil-McLain Ultra boiler control requires. This is an OEM replacement part that meets the original design specifications for safe and reliable operation.

• F3 position fast-blow fuse rated at 4 amps for Weil-McLain Ultra Gas Boiler control boards
• Fast-blow design provides immediate circuit protection against overloads and short circuits
• Comes in a 5-pack for convenient stocking by HVAC service technicians and contractors

Product Highlights

The Weil-McLain 383500240 delivers the exact OEM-specified F3 fast-blow 4-amp fuse for Ultra Gas Boiler control boards, sold in a 5-pack to support efficient field service and reduce callback risk.

Product Information

Standard Information

• Brand: WEIL-MCLAIN
• Manufacturer Part Number: 383500240

Technical Specifications

• Fuse Position: F3
• Amperage Rating: 4 Amp
• Fuse Type: Fast-Blow
• Pack Quantity: 5 Fuses
• Compatible Equipment: Weil-McLain Ultra Gas Boilers