Transformer for TTW1-12 series

Bradford White 415-41863-00 – OEM Blower Transformer for MITW Series Gas Water Heaters

The Bradford White 415-41863-00 is an original equipment transformer used in conjunction with the blower assembly of select MITW series atmospheric vent gas water heaters. Designed to deliver a stable 120V primary input to step down voltage for internal blower circuit operations, this component is essential for maintaining consistent burner control and system safety protocols.

Application and Compatibility

This factory-specified part is used in MITW40L and MITW50L models, including BN and EN configurations across -12 and -13 revisions. The transformer provides electrical power to the induced draft blower motor and associated control logic, ensuring proper air supply and combustion operation under all runtime conditions.

Technical Specifications

• Part Number: 415-41863-00
• Voltage Input: 120 VAC primary
• Transformer Type: Step-down, blower circuit power supply
• Application: Forced draft blower assembly power on MITW-series heaters
• Mounting: Internal chassis-mounted component
• Wiring: Pre-wired leads, color-coded for direct connection

Installation Requirements

This is a non-universal, OEM-only component and must be installed in compliance with product service bulletins and wiring schematics. Replacement should be performed by trained service personnel to ensure proper polarity, grounding, and isolation from other control circuits. Incorrect installation may result in operational faults or system failure.

Contractor Insights

• OEM Assurance: Only authorized transformers should be used in power-vented gas models to avoid code violations and warranty voidance.
• Service Use: Commonly replaced in response to blower non-operation or diagnostic fault codes related to air supply or ignition sequence failure.
• Stocking Recommendation: Should be kept on hand by service contractors for MITW-series troubleshooting, especially in older model years.

Notes for Field Technicians

Before replacement, confirm 120V input at transformer terminals and inspect for signs of thermal stress or damage. Confirm wiring integrity at blower motor and integrated control board. Post-installation, perform full system test to verify blower startup, gas ignition, and flame rectification response.