Lopi/Avalon Draft Flow/Vacuum Switch- Metal- Replaces 90-0791

Replacement Vacuum Switch/Air Pressure Switch for ALL Lopi/Avalon pellet stoves. Non OEM. Replaces part # 90-0791. Note: The mounting may differ for the switch that comes with your stove. You may have to drill new holes to mount this vacuum switch. Positive pressure hookup. OEM is made of plastic. This switch is made of longer lasting metal.

Avalon Pellet Stoves:

  • 900 Pellet Insert
  • 900 PS
  • Arbor
  • Astoria Bay PI
  • Astoria PS
  • Avanti PI
  • Avanti PS
  • Avalon AGP
  • Newport Bay PI

Newport PS Lopi Pellet Stoves:

  • Fox Fire 400 PS
  • Fox Fire 400 PI
  • Foxfire PS
  • Elan
  • Heritage Bay PS
  • Heritage Bay PI
  • Lopi AGP
  • Leyden PS
  • Pioneer Bay PI
  • Pioneer PS
  • Yankee Bay PI
  • Yankee PS

      Pressure adjustment range from 0.12 to 5.0 WC should be set to approx .15 for most pellet stoves.

      The vacuum  switch is a safety switch that shuts the pellet stove down if the combustion (Exhaust) blower fails. If your pellet stove starts up then stops feeding pellets after the start cycle is over, then the vacuum switch is bad or the vacuum line is clogged with ash.  Also, if the auger motor does not turn you may have a bad vacuum switch.

      Check the mounting of your old switch. This is direct fit for Pelpro and Breckwell pellet stoves. It will work on all other models with mounting adjustments.

      Most newer stoves use the open terminal and common terminal for the electrical connectors and negative vacuum port. This means the exhaust fan is after the burn pot and connects to the venting and the switch is open until the negative pressure is applied.

      Negative Pressure Hookup

      Clip wires to farthest terminals from knob. Connect hose to low port. Use this setting for the following pellet stoves.

      • Magnum & Country Flame
      • U.S. Stove
      • Pelpro/Glowboy
      • Englander
      • Breckwell
      • Napoleon
      • Enviro
      • Piazetta
      • Archguard
      • Quadrafire
      • Kozy
      • St Croix
      • Osburn/Enerzone
      • Lopi/ Avalon

      Positive Pressure Hookup

      Clip wires to outer terminals. Connect hose to Hi port (Bottom port). For the following pellet stoves.

      • Whitfield