Harman Hopper Lid Gasket 3/8" x 1/2" x 6' #1-00-375501

SKU 1-00-375501
MPN 1-00-375501
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Frequently Bought Together


This Harman Pellet Stove Hopper Lid Gasket is compatible with all Harman stoves and inserts that have a glass hopper lid and the 60 Series HHT Boilers from Harman. The gasket is made from a foam material that naturally curves within the channel and has an adhesive backing.

Other codependent parts that must be present and in working order for the lid gasket to properly seal are:

  • Hinge Screws
  • Lid Latch
  • Lid Knob

Replacement For Part Number :
  • 1-00-375501

UPC #: 652174583850

Compatible Models


  • Absolute 43
  • Absolute 43-C
  • Absolute 63
  • Accentra 52i
  • Accentra 52i TC
  • Accentra Cast Free Standing
  • Accentra Insert
  • Advance
  • Allure 50
  • Allure 50-CE
  • Furnace & Boiler Systems
  • HF60
  • Invincible Insert
  • P35i
  • P35i-C
  • XXV
  • XXV TC

Technical Specs

Length 6 Feet
Width ⅜"
Self-Adhesive Yes


Assembly Instructions For Harman Hopper Lid Gasket 3/8" x 1/2" x 6' #1-00-375501

Replacing the hopper lid gasket is a very simple process. Simply pull the gasket up at the seam. You may need to scrape any adhesive and foam that sticks in the channel. The new gasket does need a clean surface to adhere to.


This gasket should be changed as it starts to wear and crack. Care should be taken to periodically remove dust and pellet pieces that collect along the edges of the gasket while performing routine maintenance.

The hopper lid on Harman stoves needs to make an air-tight seal for the stove to operate. If air is leaking through the gasket, your stove of insert may feed at a slower rate which could eventually lead to an error code.

  • If your knob on the door is loose, tighten it or replace it as it too can cause and air leak.
  • The 2 screws that fasten the lid to the hinges can also be loose or missing and cause the lid to be a loose fit
  • The latch that secures the lid down can also fail and prevent the lid from sealing

For newer stoves and inserts with a touchscreen display, if you are getting constant error codes telling you the hopper lid is open when it is closed, and you have checked the gasket, hinge screws, knob and latch and are still getting an error, a lid calibration may be required. There is a diagnostic "dealer" area hidden within the touchpad where you can calibrate the lid sensor.

  1. From the home screen, go to diagnostics and scroll to page 6.
  2. Touch the blank space of the screen in the lower right hand corner and release your finger
  3. Enter password 1979
  4. Go to 'Lid Calibration' and follow the instructions


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 $99!

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

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Customer Reviews

Based on 3 reviews

Harman Hopper Lid Gasket 3/8" x 1/2" x 6.5' #1-00-375501

Gasket Purchase

Very good. Arrived when promised and the gasket was easy to install

Working perfectly

Cheaper then oem and just as good!


Ask a Question
  • Does a Harmon 52 I insert burn pot gasket go bad overtime? The dealer upgraded the burn pot the first year. I have on my insert since 2014 burn 3 tons per year. The ash builds up on the burn pot doesn’t seem to be blowing it off like it was when it was New. I don’t Have any error codes. Would a worn out door gasket create this problem? I never replaced any gaskets because they look ok.

    If your stove ignites on its own, the answer would be no. You can use a pellet with less ash content and/ or clean the area inside the burnpot, the stove and the venting.

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