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Harman Pellet Stove (Combustion/Exhaust) Blower Motor: 3-21-08639-AMP

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Product price:
$129.99

$89.96 less than the OEM

Product SKU ! 3-21-08639-SP4L
Product MPN ! 3-21-08639
Product availability: In Stock
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Harman Combustion Blower Mounting Post, 3/4": 1-00-53483208

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'Very quiet! This is substantially quieter than the original blower in my 2005 Accentra - even when the stove was brand new. (And definitely quieter than the original after the bearings started to go.) Also, this replacement blower was easier to install than the original one was to remove. The OEM version (at least from 2005) has obstructions that make the mounting nuts very difficult to reach, and very easy to drop and lose under the stove. This version is more compact, and didn’t require the use of a mirror and a borescope to get at the nuts, like I needed for removal."-Jeff R.
You are viewingAftermarket (AMP)Saves $89.96 vs the OEM Consider insteadOEM
Harman Pellet Stove (Combustion/Exhaust) Blower Motor: 3-21-08639-AMPRelated Product Title Harman Combustion Blower Exhaust Fan Motor: 3-21-08639
$129.99In stockRelated Product Price: $219.95 In stock
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Description

Harman Pellet Stove Combustion/Exhaust Blower Motor: 3-21-08639. This blower expels smoke from the unit and draws combustion air into the stove. A malfunctioning blower may cause a lazy flame, failed ignition, or inefficient burning. This blower fits many Harman pellet stoves!

Important Note: This blower motor comes with the fan blade in the photo, but DOES NOT come with an impeller.

Every stove that takes this motor requires a secondary impeller.

Harman uses 3 different-sized impellers to fine-tune how much air is moved through the stove. It is advisable to purchase an impeller when replacing this blower, as the old impeller from your existing blower may not come off the shaft (seized), or it may be damaged in the process of removing the blower.

  • Models P38, P43, P61A, P68, PB105, PF100, XXV, 44 MAG, Advance, Accentra 52i, DVC500, & HF60
  • 5" double paddle blade impeller, part # 3-20-502221
  • Models Accentra Insert & P35i
  • 4 3/4" Single paddle blade impeller, part # 3-21-00661
  • Models Accentra FS, Invincible T, PC45, PF100, & Pellet Pro II
  • 5" Single-Paddle blade, part # 3-20-40985

Note: Harman uses a threaded mounting post to secure most of their combustion motors which can become stripped. They are sold individually and each motor uses three (3): 1-00-53483208

Note: These are the nuts that thread on to the posts: HDW600

UPC: 652174686957

Replacement For Part Numbers:

  • 3-21-08639
  • J238-112-11142

Compatible Models

Please refer to your owners manual and model information. Where To Find Your Make & Model

Technical Specs

Check these against the part you are replacing before ordering. If a dimension does not match, contact us and we will confirm the fit.

Length (in) 5"
Width (in) 4 ¾"
Height (in) 4 ½"
Voltage 120
Amperage 1.17
RPM (Rotations/Minute) 3000
Frequency (Hz) 60
Wire Connector Notes Three Female Spades At End Of Wires
Shaft Diameter 5/16"
Shaft Length 1-13/16"
Weight 3.25 lbs

Wiring and Connectors

Wire, terminals and connectors for the job, in case yours are worn or the ones you have do not reach.

Instructions

Install Instructions For Harman Pellet Stove (Combustion/Exhaust) Blower Motor: 3-21-08639-AMP

Instructional Documents

Instructional Videos

Instructional Notes

This combustion blower is used on all Harman pellet stoves so the specific instructions are going to vary by model, which are too many to explain in written detail, but here is a basic overview of what you will need to do:


  1. Always disconnect the power to the stove before attempting any service
  2. Except for the Invincible Series Inserts, Harman does not use a combustion blower housing for any of their pellet stoves. Instead, the motor is mounted either directly to the back of the stove, or they will have the motor mounted on a removable steel plate or hub or their own design. For motors mounted on the stove body, you will need to open the firebox, remove the combustion motor cover, remove the impeller from the motor shaft and then you can remove the motor from the back of the stove.
  3. In a perfect scenario, everything comes apart easily, however; the impeller can become seized on the motor shaft if it has never been removed, in which case the shaft of the motor must be cut. This will require a new impeller to be mounted on the new motor so you will want to have one of those on hand. See the description for this b lower to figure out which impeller you need, there are three (3) types to choose from, depending on your stove model. If you need to cut the shaft, a hand-held hacksaw blade is the best tool. It needs to be long and narrow because it need to fit between the motors cooling fan and the stove wall from behind the stove. You will also need to jam a screwdriver or something between the impeller and stove wall in the fire box to keep the shaft from spinning as you cut through the shaft. This same process may need to be done for stoves that use a removable hub but it will be easier because the whole assembly can be removed from the stove when cutting.
  4. All of these motors are secured to the stove using threaded studs which pass through the firebox or the hub and are wedged in place. If the stud is spinning when you are trying to remove the nut, the stud must also be cut in the same way as the shaft. This is not as common but it can happen. Links to these studs and replacement nuts are also in the description.
  5. Once everything is removed you will install your new studs is needed, install the motor to the stove or hub, install your existing or new impeller and then reconnect all of the wiring.


Troubleshooting

Troubleshooting Notes

Solving Combustion Blower Issues

  • If your stove is an insert and the venting was not cleaned properly while the stove was pulled out, there’s a good chance that ash fell down and is blocking the combustion blower from spinning.
  • If your stove has a combustion motor cover inside the stove, make sure it was put back and secure.
  • If your combustion blower is removable (Accentra Insert and XXV), make sure the blower is properly secured and tight-fitting. It is possible on these two stoves improperly install the blower.
  • If service was performed on the combustion blower itself, make sure the impeller blades aren’t rubbing against the cover or the cooling fan blades aren’t rubbing on their cover or a pellet isn’t obstructing the cooling fan from turning.
  • If wires were disconnected, make sure the combustion blower is plugged into the correct wires.
  • If the combustion blower is NOT turning and everything is wired correctly and nothing is obstructing it from turning… AND the Combustion Blower lights are illuminated on the control board, a new combustion blower will need to be installed.


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Warranty

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 special parts may take up to 4 weeks for processing, and customers are responsible for return shipping charges.

Shipping Information

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: 12PM, Saturday: 10AM, Sunday: No Shipping), orders placed after our cutoff time are shipped the next morning.
Do You Offer Express Shipping?
Yes! Please note the shipping times are based on business days, weekends and holidays do not count to the delivery date. Please see our expedited ship time schedules here.
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.
Do You Ship To Canada?
We ship to Canada! We estimate USPS to take 4-10 days once receiving your package. Please note, we are unable to track US Postal packages once they cross the US border and cannot guarantee shipping times. All customs fees incurred are the responsibility of the customer and are not included in the total price. 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 Hawaii?
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.
Learn More About Our Shipping Information

Questions & Answers

If your question does not concern this part, contact us directly or read our FAQs.

  1. Is this motor 1.75amps?

    Asked by Peter on Dec 03, 2019

    This blower is made to the same specification as the original

    Answered by Stove & Grill Parts For Less on Dec 03, 2019

  2. whats the difference in fasco or NBK?, cant find the info in the manual for my xxv harmon!

    Asked by Maynard Helleland on Oct 02, 2018

    Fasco and NBK are two different manufacturing companies. While Fasco is more commonly known NBK is a company that also makes compatible parts to the Fasco OEM versions.

    Answered by Stove & Grill Parts For Less on Oct 23, 2018

  3. Does this part come with the grommet and spacers on it?

    Asked by Paul on Aug 01, 2018

    Yes it does

    Answered by Stove & Grill Parts For Less on Aug 01, 2018

Every question is read by our team before it appears here, so it will not show up right away - we will email you the answer.

Customer Reviews

Based on 66 reviews
92%
(61)
8%
(5)
0%
(0)
0%
(0)
0%
(0)
J
Jim W.

Harman Combustion Blower Exhaust Fan Motor: 3-21-08639-AMP

J
Judith R.
Part was accurate and nice quality

My repairman was able to use this to replace the other part but we wished there had been instructions on how to remove the original combustion blower. We found some online on youtube.

G
Glenn C.

Harman Combustion Blower Exhaust Fan Motor: 3-21-08639-AMP

M
Michael D.
Harman Combustion Blower Exhaust Fan Motor: 3-21-08639-AMP

Works better than original one…. Couldn’t be more happy with it… the shipping was very fast which I was blessed and grateful for because it is one of our two heat sources and our first heat source doesn’t keep up with our home very well. Without the pellet stove we would have a 58 degree house in 20 degree outdoor temperatures. We rely on the pellet stove heavily.

R
Rick B.
Pellet stove repair

Wonderful service. Ordered two parts that came faster than expected. Stove works good as new. Wil highly recommend.

Still have a question?

Call or email us and we will help you find the right part.

Contact us 1-508-392-9831
Mon–Sat 9AM–5PM · Sun 10AM–3PM ESTShipping policy · Return policy · FAQs

Customer Reviews

Based on 66 reviews
92%
(61)
8%
(5)
0%
(0)
0%
(0)
0%
(0)
J
Jim W.

Harman Combustion Blower Exhaust Fan Motor: 3-21-08639-AMP

J
Judith R.
Part was accurate and nice quality

My repairman was able to use this to replace the other part but we wished there had been instructions on how to remove the original combustion blower. We found some online on youtube.

G
Glenn C.

Harman Combustion Blower Exhaust Fan Motor: 3-21-08639-AMP

M
Michael D.
Harman Combustion Blower Exhaust Fan Motor: 3-21-08639-AMP

Works better than original one…. Couldn’t be more happy with it… the shipping was very fast which I was blessed and grateful for because it is one of our two heat sources and our first heat source doesn’t keep up with our home very well. Without the pellet stove we would have a 58 degree house in 20 degree outdoor temperatures. We rely on the pellet stove heavily.

R
Rick B.
Pellet stove repair

Wonderful service. Ordered two parts that came faster than expected. Stove works good as new. Wil highly recommend.