ComfortBilt Pellet Stove Vacuum Switch: CB-VACUUM-SWITCH-NS-AMP


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ComfortBilt Pellet Stove New Style Vacuum Switch.  The vacuum switch is part of the stoves safety system.  It is designed to detect a negative pressure inside of the burn box.  If a door is left open or a gasket is not sealing properly the vacuum switch will not detect negative pressure inside the unit.  This will cause the stoves to stop feeding pellets.

Replacement For Part Numbers:
  • VAC-2

Click To See Compatible Models


Assembly Instructions For ComfortBilt Pellet Stove Vacuum Switch: CB-VACUUM-SWITCH-NS-AMP

Install Instructions:

1.) Unplug the unit.

2.) Remove the side or back panel to gain access to the switch (The location of this switch will vary from model to model. See page 4 of ComfortBilts: Guide to Switches! for detailed information on the switch location).

3.) Once you have the switch in view disconnect the two spade connectors (Pay close attention to where these connectors attach to the switch).

4.) Disconnect the vacuum hose from the switch.

5.) Using a small screwdriver remove the two screws holding the switch in place.

6.) Install the new switch and attach it to the stove using the screws previously removed.

7.) Reconnect the vacuum hose to the switch.

8.) Reattach the spade connectors to the switch (The wires must attach to the same prongs, as they were installed on the previous switch.)

9.) Reinstall the rear or side panel.

10.) Plug in the unit.

For more detailed information click on ComfortBilts: Guide to Switches! or Click on Videos in the above tab.



Often when the unit stops feeding pellets customers assume there is an issue with their auger. In reality, this issue is often the result of a vacuum pressure problem. If the vacuum switch is operating correctly, there will be a “V” symbol visible on the bottom of the main screen on the control panel when the exhaust fan is running. If the “V” is not present, follow the troubleshooting steps found on page 4 of ComfortBilts: Guide to Switches!


Unfortunately, sometimes products do not work like they are supposed to. We offer a 90 day warranty on manufacturer defects. Some manufacturers make this a very simple and easy process unfortunately others do not. Items must be used in accordance with the manufacturers guidelines to qualify for warranty replacement. Please be advised that warranty claims for these parts may take up to 4 weeks for processing, and customers must cover shipping.

Shipping Info

This Item Qualifies For Free Shipping With Orders Over $199!

When Will My Order Ship

All orders are typically processed within 24 hours of receiving payment and are shipped from us same day if placed before our shipping cutoff time (Monday - Friday: 1PM, Saturday: 10AM, Sunday: No Shipping), orders placed after our cutoff time are shipped the next morning.

How Does Free Shipping Work?

Most orders over $199 qualify for free shipping! Orders which ship for free are shipped with either USPS or UPS based on our discretion. If you are using a PO box, free shipping orders will always go USPS.

Is Expedited Shipping Available?

We offer both overnight and two day air shipping services for all orders placed within the Continental United States. For information on shipping cut-off times, go to our shipping page.

Do You Ship To Canada?

We ship to Canada! We estimate USPS to take 4-10 days once receiving your package from us. We do not offer expedited shipping of any kind to Canada. Please allow an extra 2-5 days for all shipments to Canada. Free shipping is not available to Canada.

Do You Ship To Alaska Or Hawii?

We ship to both Alaska and Hawaii! We do not offer next day or two day shipping to Alaska or Hawaii. Free shipping is not available to Alaska or Hawaii.

Do You Ship Outside The US Or Canada?

Unfortunately, at this time we do not offer international shipping other than to Canada.

Shipping Time Estimations

For information on shipping time estimations, see the Shipping Information & Transit Times on the shipping page.

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