A Carrier HVAC CT99QX801 Gasket supports a tight seal at connection points to reduce leakage and maintain steady performance in the unit.
The gasket forms a sealed connection between mating components in the HVAC system, allowing air or gases to move through intended paths without escaping at the joint. Its ring shape and 8-inch inside diameter matter because they provide proper fit, sealing pressure and durability needed to maintain efficient operation in heating and cooling equipment.
The gasket may be failing if the heating and cooling unit shows airflow loss, reduced efficiency, pressure-related issues or escaping air around the sealed connection. Physical signs can include cracking, flattening, brittleness or deformation and you might notice environmental signs such as dust buildup, moisture or residue collecting near the joint.
Customers can take advantage of same-day shipping on in-stock real OEM HVAC replacement parts Monday—Friday until 9 PM ET, as well as on Saturday until 4 PM ET for online air orders. If you place an order after that time, we'll process it the next business day.
Check the status of your real OEM HVAC parts by going to our Track My Order page and submitting your order number or purchase order (PO) number with your zip code. If you want to stay updated on your order's delivery status, you can do so at any time.
Parts Town offers multiple customer assistance options for real OEM HVAC parts 8 AM to 9 PM ET Monday through Friday with help through chat, email, phone and more. Visit our Contact Us page to find out how to speak with a team member about any questions you may have regarding your purchase.
Of course! We provide the option to return most new, unopened real OEM heating and cooling replacement parts within 90 days of delivery, so check our Returns page to see if your purchase qualifies. Certain items, including custom orders, may not be eligible for return.