Allied Air 15D57 Defrost Control Board Assembly

Product Description

The ALLIED AIR 15D57 is a defrost control board assembly designed for use in furnace-based heating systems. This board manages the defrost cycle, signaling the system to clear frost accumulation from the heat exchanger or coil assembly under conditions that would otherwise reduce efficiency or cause equipment damage. The 15D57 is a direct-fit replacement component installed by licensed HVAC technicians during scheduled maintenance or corrective service calls. At 0.9 pounds, the assembly is a compact, low-weight component suited for standard residential furnace cabinet access.

This defrost control board assembly is intended for use in furnace applications where automatic defrost cycle management is required. Based on the raw title reference to the 14SR and 4HP14L18P designations, this board is associated with Allied Air furnace and heat pump product lines in residential installations. It provides the logic control necessary to initiate and terminate defrost cycles, protecting system components during low-ambient or high-humidity operating conditions.

Key Features

• Controls automatic defrost cycles to protect heat exchanger and coil components
• Direct-fit replacement assembly for Allied Air furnace applications
• Compact, lightweight design at 0.9 pounds for easy handling during service
• Board assembly format for straightforward swap-out during service calls

Compatibility

Associated with Allied Air furnace and heat pump models referencing designations 14SR and 4HP14L18P. Designed as an OEM-style replacement defrost control board assembly for Allied Air residential furnace systems.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect all electrical power to the furnace and heat pump system at the disconnect switch and breaker before removing the existing control board. Handle the board assembly carefully to avoid damage to connectors or traces. Verify all wiring connections are secure and match the original configuration before restoring power.

Technical Specifications

• Type: Defrost Control Assembly
• Application: Furnace
• Weight: 0.9 pounds

Standard Information

• Brand: ALLIED AIR
• Manufacturer Part Number: 15D57