Harman Accentra and Invincible Insert, Magnum Stoker Distribution Blower, 3-21-47120

SKU 3-21-47120
MPN 3-21-47120
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Frequently Bought Together


This is the complete distribution fan assembly with motor, fan wheel, and housing for the INvincible and Accentra Pellet Inserts and The Harman Magnum Coal Stoker.

For the Invincible Insert and Accentra Insert, only the motor and fan will fit into the insert as the original housing is welded in. This entire assembly can be replaced on the Harman Coal Stokers.

Harman Product Bulletin: March 15, 2011

The replacement blowers for the Super Magnum Stoker, Invincible, and Accentra pellet inserts are now one-speed blowers. Previously these replacement blowers were three-speed with two speeds made inactive. (Red and Blue not connected) All production models beginning with serial number 008600509 for the Super Magnum Stoker and serial number 008248445 for the Accentra pellet insert have been changed to the one-speed blower. This new wiring is invisible to the consumer since it still only operates at one speed like it always had.

Installation requires two (2) 1/4" female wire terminals (not included) to be crimped to the wire leads at the time of installation.

Our old part number 12189-M

*If the serial number on your Harman Invincible Insert falls between serial number 1556 - 2128, this blower is not compatible with your stove. During that time Harman was using part number 3-21-08619. This part is now obsolete.

Replacement For Part Number :
  • 3-21-47120

Compatible Models


  • Accentra Insert
  • Invincible Insert (2128 - 1556 )
  • Magnum Stoker
  • Super Magnum Stoker

Technical Specs

Volts 115
Cycles 60 HZ
Amps 1.95
RPM 1360
CFM 180
Wiring Connectors 2 QTY
¼" female
not included


Assembly Instructions For Harman Accentra and Invincible Insert, Magnum Stoker Distribution Blower, 3-21-47120

Access to these motors can be tricky as they are located under the unit itself se diagrams below.

  1. Unplug your stove
  2. Locate the wiring disconnects and separate the connections for the motor
  3. Remove the three mounting screws and remove the blower.
  4. If you are doing a motor only replacement, remove the squirrel cage blower fan and attach it to the new motor
  5. Insert new motor and secure with old hardware.
  6. If your blower requires new wire terminals, attach those to the stripped section of wire
  7. Connect your wires black to black and white to white
  8. Secure the wires from dangling with zip ties


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!

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.

If you wish to calculate shipping for an item which does not qualify for free shipping, or if you would like the cost to expedite your order, please do the following. Add the item you want to order to your cart and click here to be taken to the cart page where you can enter your country, state / province, and zip code for an estimate.

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Customer Reviews

Based on 2 reviews
great Job!

As usual a wonderful experience!

Blower replacement #3-21-47120

Fit perfectly and works great!


Ask a Question
  • The aftermarket distribution motor looks like it has more wires to hook up than the oem. How does that hook up

    Aftermarket is capacitor start and drive, OEM is a simple induction motor. Both the AMP and the OEM motors wire up the same, white to white and black to black