Pellethead Vacuum Pressure Differential Switch – For Harman Heatilator, 3-20-6866

Pellet stove not igniting or shutting down unexpectedly?

This vacuum pressure switch might be your culprit.

Pellethead replacement fits Harman and Heatilator models.

Interchanges with 3-20-6866, SRV8320-003, and 20168.

Made for pellet, corn, and coal stoves.

Brand new, 2024 manufacture, 1-year warranty.

If your stove’s control board isn’t sensing proper vacuum, it won’t feed fuel.

Swap this switch and get the fire burning again.

Direct replacement, plug-and-play.

No UPC, but MPNs are cross-referenced.

Easy diagnosis, easy fix.

Don’t call a tech—try this first.

Pellethead makes solid replacement parts.

Keep your home warm without the service call.

Safety component, do not bypass.