Harman Combustion Blower Exhaust Fan Motor By Fasco, 3-21-08639-AMP

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Original Price $119.99
Current Price $89.99

A $130.00 Savings vs the OEM

SKU 3-21-08639-SP4L
MPN 3-21-08639
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Description

This exhaust blower motor is extremely durable and is used on most steel and cast iron Harman pellet stoves.  Some pellet stoves had an older version of this blower that looked much different. This motor design is updated as the replacement for all pellet-burning stoves. The blower motor comes with wire terminals and plugs directly into existing connections for all models.

This blower motor DOES NOT come with an 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.

See below:

    • 5" double paddle blade impeller, part # 3-20-502221 is used on the P38,43,61A, 68, PB105,PF100, XXV, 44 MAG, advance,Acc52i, DVC500, HF60
    • 4 3/4" Single paddle blade impeller, part # 3-21-00661 is used on the Accentra Insert & P35i
    • 5" Single-Paddle blade Accentra FS, Invincible T, PC45, PF100, Pellet Pro II you need part # 3-20-40985


    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) Part # 1-00-53483208


    Here are the nuts that thread on to the posts, Part # HDW600


    Replacement For Part Number s :
    • 3-21-08639
    • PP7613


    UPC #: 652174686957

    Compatible Models

      Harman

    • Accentra 52i
    • Accentra Cast Free Standing
    • Accentra Insert
    • Advance
    • DVC 500
    • HF60
    • P35i
    • P35i-C
    • P38
    • P38+
    • P43
    • P43-C
    • P61
    • P61-C
    • P61A
    • P68
    • P68-C
    • PB105
    • PC45
    • PF100
    • PF120
    • XXV

    Technical Specs

    Volts 120
    Amps 1.17
    Cycles 60 Hz
    RPM 3000
    Shaft Diameter 5/16"
    Shaft Length 1 13/16"
    Wiring Connectors 3-Wire Pig-tail with ¼" female spades

    Video

    Instructions

    Assembly Instructions For Harman Combustion Blower Exhaust Fan Motor By Fasco, 3-21-08639-AMP

    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

    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.



    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 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.

    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.

    Read More About Our Shipping Information

    Customer Reviews

    Based on 45 reviews
    89%
    (40)
    11%
    (5)
    0%
    (0)
    0%
    (0)
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    (0)
    T
    Team T.
    Whisper Quiet

    After removing the old blower motor and trying to salvage it I threw in the towel. The motor I bought is very quiet and works great! Just in time for the cold . Two thumbs up👍👍

    b
    brian m.

    Harman Combustion Blower Exhaust Fan Motor By Fasco, 3-21-08639-AMP

    J
    Jim
    Great place to shop

    Easy to find what you want, great price, and fast shipping. I've got you in my favorites because I'll be buying from you again. Just a great experience.

    H
    Heather V.
    Excellent price.

    Fast shipping and accurate description

    T
    T k.
    Exhaust fan motor

    Received the part quickly. It did the job. Stove is running quietly again

    QUESTIONS & ANSWERS

    Ask a Question
    • Is this motor 1.75amps?

      This blower is made to the same specification as the original

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

      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.

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

      Yes it does

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