Hearth & Home 3-20-6866 Differential Switch

Hearth & Home 3-20-6866 Differential Switch

Overview

The Hearth & Home Differential Switch (Part Number 3-20-6866) is a crucial pressure-sensitive component used in select pellet and gas stove models to monitor and regulate proper airflow and exhaust operation. This OEM part ensures that the combustion and venting systems are functioning safely by detecting differences in air pressure and enabling ignition only under the correct operating conditions. If a blockage or fan failure occurs, the differential switch helps prevent unsafe startup or operation. Built for durability and precision, the 3-20-6866 switch plays a vital role in maintaining efficient, safe performance in Hearth & Home Technologies appliances.

What’s in the Box

• 1 x Differential Switch

Recommended For

The Hearth & Home Differential Switch (Part Number 3-20-6866) is compatible with a range of Harman and Heatilator Eco-Choice pellet stove models. Below is a list of models that utilize this differential switch:​

Models

Harman: Absolute 43, Absolute 43-C, Absolute 63, Accentra FS, Accentra 52i, Accentra 52i-TC, Advance, Allure 50, HF60, P35i, P38, P43, P61, P61A, P68, PC45, PF100, PF120, PB105, XXV, XXV-TC

Heatilator: BH60, BH105, BA100

Brand

Hearth & Home®