S1-331-03500-000 CIRCUIT BOARD KIT 2 Stage Heat Pump Control

S1-331-03500-000 CIRCUIT BOARD KIT 2 Stage Heat Pump Control, AOC YHM

OEM Defrost / Control Board Kit for Heat Pump Systems

The S1‑331‑03500‑000 is an OEM York‑family CH16B, TH16B AOC, YHM circuit board kit, used in select heat pump systems for defrost control, compressor protection, and outdoor‑unit logic. This board manages the timing, sequencing, and safety functions required for proper heat‑pump operation.

This Board has an LED diagnostic light flash codes

Product Description

This OEM board is part of York’s outdoor‑unit control family. It governs:

• Defrost cycle initiation and termination

• Compressor and reversing‑valve sequencing

• Outdoor‑fan control

• Safety lockouts and timing delays

• Sensor and thermostat signal processing

A failing board may cause:

• No heat or no cooling

• Unit stuck in defrost

• Short‑cycling

• Outdoor fan not running

• Intermittent compressor operation

The S1‑331‑03500‑000 kit is a direct‑fit replacement and installs using the factory harness and mounting pattern.

Key Features

• OEM York/Coleman/Luxaire control board

• AOC/YHM series logic platform

• Manages defrost, compressor timing, and outdoor‑fan control

• Direct replacement for factory board

• Compatible with select heat‑pump outdoor units

• Factory‑grade PCB for durability and reliability