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• This Product: Harman & Heatilator Vacuum Pressure Differential Switch, OEM - $24.95
• Pellethead Ash Vacuum Pro - $129.00
• Stove Bright Glass Cleaner, Fireplace & Stove Window Spray, 16oz Bottle - $9.99
• Harman & Heatilator Vacuum Differential Pressure Switch Silicone Tubing Hose, Aftermarket - $14.99

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HARMAN & HEATILATOR PRESSURE SWITCH

Genuine OEM replacement Harman and Heatilator Eco-Choice vacuum differential switch, part number 3-20-6866. The replacement vacuum differential switch is used in all Harman pellet stove models, the Harman Mark I coal stove model, and Heatilator Eco-Choice boiler and furnace models including the BA100, BH105, BH60, and BIO-120.

Also referred to as the negative pressure switch or low draft switch, the vacuum differential switch senses air pressure in the firebox and exhaust flue vent pipe. The vacuum switch is in-line with the auger feed motor and will not allow the auger motor to run if it is tripped or faulty. Any air losses or air blockages can trip the vacuum switch. When experiencing issues with this safety switch, check the following: vacuum switch hose/tubing, firebox door and ash door gasket seals, ash accumulation in the stove or venting, air intake channel, combustion blower/exhaust fan functionality. Check out our video below to learn more about the pressure switch.

OEM Vacuum Pressure Differential Switch

Guaranteed Newest Stock Inventory

1 Year Manufacturer Warranty


Why Choose Pellethead?
 




On-Time Shipping


USA Retail Locations


Unmatched Warranty – No Hassles


Live Tech Support



We have over a 99.5% on-time shipment rate. Get your products on-time or before the estimated delivery date.
We are not fly by night online Retailers that will be here today and gone tomorrow.
We stand behind every product we sell with our no hassle warranty.
We offer tech support for every single product we sell. Have an issue, have a question? No problem give us a ring.



Experienced


Quality Affordable Parts


Pellethead Ash Vault Pro


Pellethead Smokin Po Boy



We have been in business 30 years, we are pellet stove specialists. Period.
We service our customers stoves, and provide you with the same quality parts.
Check out the only ash vacuum made by pellet stove professionals in a corded and cordless option.
Want to cook pizza in 3 minutes? Check out the Pellethead Smokin Po Boy.



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