Ensure safe and efficient operation of your Heatilator pellet stove or Harman pellet stove with the replacement Harman & Heatilator Eco-Choice Differential Pressure Switch (SRV8320-003). This essential air switch, also known as a pressure switch, differential pressure switch, or vacuum switch, monitors the negative pressure in your stove's firebox, ensuring proper airflow and preventing potential hazards. Designed specifically for Heatilator Eco-Choice and Harman models, it plays a crucial role in maintaining optimal combustion by detecting blockages or issues in the venting system. When the correct pressure levels are not met, this differential switch signals the stove to shut down, protecting your home and enhancing the stove's performance. Built for reliability, this OEM part ensures seamless integration and peace of mind. Upgrade or replace your pressure switch today to keep your pellet stove running efficiently and safely.

Fits the following models:

Harman Pellet Stoves:

• P68
• P68-C
• P61
• P61A
• PF100
• P38
• PP38 +
• Advance
• Advance (Irish)
• Advance (French) 
• Advance (Japan)
• P35I
• P35I-C
• XXV
• XXV (Irish) 
• XXV (French) 
• Accentra Insert
• Accentra Insert (Irish)
• Accentra Insert (Japan) 
• Accentra 52i Insert
• P43
• P43-C
• PC45
• PB105
• HydroFlex60
• XXV-TC
• P42I-TC
• Absolute43
• Allure50
• Absolute63

Heatilator Pellet Stoves:

• BA100
• BH105
• BH60
• BIO-120

HHT part # SRV8320-003
Replaces old part numbers 3-20-6866, 3-20-9301 and 3-20-3433
OEM HHT part

May fit other models, please check your owner's manual for part number compatibility.