521135 Suburban MOD BOARD IW60

OEM Ignition/Control Module for Suburban IW60 Tankless Water Heater

The 521135 is the OEM Suburban module board designed specifically for the IW60 on‑demand (tankless) water heater. This control board manages ignition, flame sensing, safety lockouts, and burner sequencing for the IW60 system.

The 521135 Suburban IW60 module board is the central electronic controller for the IW60 tankless water heater. It governs:

• Spark ignition

• Gas‑valve timing

• Flame‑sense monitoring

• Safety lockout logic

• Burner modulation and sequencing

A failing board can cause ignition failure, intermittent heating, or complete system shutdown. This OEM replacement restores proper operation and is plug‑compatible with the IW60 wiring harness.

📐 Key Features

• OEM Suburban control board for IW60

• Manages ignition, flame sensing, and safety circuits

• Direct replacement for factory module

• Designed for high‑heat tankless compartments

• PCB‑grade durability and stable electronics

• Fits IW60 only (not interchangeable with ST‑series or furnace boards)