Harman OEM Distribution Convection Room Air Blower, 3-21-33647

SKU 3-21-33647
MPN 3-21-33647
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Frequently Bought Together


Harman Distribution Blower for many units, see our stove compatibility tab.

The distribution blower is also known as the room air blower or convection blower. This blower moves room air through the heat exchanger to produce convection heat and to keep the stove from overheating.

This is the same part as 3-21-22647

Replacement For Part Number :
  • 3-21-33647

UPC #: 652174686971

Compatible Models


  • Absolute 63
  • Accentra 52i
  • Accentra 52i TC
  • Advance
  • Allure 50
  • DVC 500
  • Invincible RS
  • Invincible T
  • P38
  • P38+
  • P43
  • P43-C
  • P61
  • P61-C
  • P61A
  • P68
  • P68-C
  • PC45
  • Pellet Pro II

Technical Specs

Volts 115V
Cycles 60Hz
RPM 1500 RPM
Amps 1.0 AMP
DIrection Clockwise
Shaft Diameter 5/16"



Assembly Instructions For Harman OEM Distribution Convection Room Air Blower, 3-21-33647

  1. Unplug the stove from power
  2. Locate the old blower on the stove and disconnect the wires leading away from it to the wiring harness
  3. Using a 3/8" socket driver, remove the two screws holding it in place
  4. Install the new blower, securing it with the same hardware
  5. Reconnect the wires, white to white and black to the other corresponding color
  6. Make sure to reattach the green grounding wire if there is one
  7. secure any loose wiring with zip ties


If your stove is overheating or prematurely shutting down, a collection of debris in this blower fan can be the culprit. Always clean this blower when troubleshooting. Some units use 2 of these blower in the stove or insert.


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 $99 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.

Shipping Time Estimations

For information on shipping time estimations, see either the Shipping Information & Transit Times on the cart page, or go to our shipping page.

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Customer Reviews

Based on 6 reviews
OE part

Not much to say. Always fast shipping.

Super quick service!

Was the right part delivered quickly. Perfect transaction!

So easy to replace your pellet stove blower

It was easy to order, the delivery was fast, and the installation was easy. It has so much more power now. Don't wait, replace yours before it goes out.

very fast delelivery , and parts were new

I received the parts on time line estimated by the company. They appeared to be new (never used before.) and the price was very competitive.

Harman Distribution Blower, 3-21-33647

My Harman Advance Pellet stove is a ripe fourteen years old, and it was time to return it to its original operating mode. I purchased the Harman Distribution Blower for this purpose. As always, the service from Pellet Stove Parts 4 Less was prompt. In just two days I had the part. Replacing it was easy. I am not a technician, so it took me ten minutes to replace it. The flame on the burning pot is no longer a crazy seen. It now stands tall and straight. No more half burned pellets. Thank you Pellet stove parts 4 less.


Ask a Question
  • Will this blower fit a p61a pellet stove


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