
Genuine AS3 Replacement Gasket Set
This genuine Espar / Eberspächer AS3 service kit includes the essential gaskets required to maintain a proper airtight seal in Airtronic D2L and B2L heaters (12V & 24V). These components are critical for ensuring safe, efficient heater performance.
The gaskets in this kit provide the necessary seals between:
The blower motor and heater unit
The combustion chamber and housing
Replacing these gaskets prevents:
Air leaks
Exhaust leaks
Loss of pressure
Reduced heater efficiency
A proper seal is essential whenever the blower, burner chamber, or housing is removed during servicing.
For best results during heater maintenance:
Replace the internal fuel pump filter
Check for carbon buildup
Inspect for fuel residue
Important: 3rd-generation Airtronic AS3 heaters do not use a glow plug screen.
252953990603
25.2953.99.0603 / 25.2953.99.06.03
25 2953 99 0603 / 25 2953 99 06 03
This service kit is suitable for the following heaters:
Espar / Eberspächer Airtronic AS3 D2L – 12V
Espar / Eberspächer Airtronic AS3 D2L – 24V
Espar / Eberspächer Airtronic AS3 B2L – 12V
Warranty Terms
Mellor Solutions Ltd trading as Mellor Online is an authorised distributor of heating parts and heater kits for the vehicle and marine markets.
Warranty Coverage:
Additional Services:
Returning a Heater:
Customer Responsibilities:
Exclusions and Important Notes:
Returns Policy
Our returns policy applies to consumer purchases only (not business or trade orders).
Our returns policy does not cover items that fall under manufacturer warranties. If you believe your item is eligible for warranty service or you wish to return an item for a refund, please contact our support team or email us at sales@melloronline.co.uk.
Refunds and Cancellation Rights
You have the right to cancel your order within a 14-day cooling-off period, starting the day after you receive your items. Refund requests can be submitted within 30 days of the invoice date. Refunds will be processed within 14 days of receiving the returned goods.
Notification of Intent to Cancel
To cancel an order or request a refund under the UK Consumer Contracts Regulations 2013, you must inform Mellor Solutions Ltd trading as Mellor Online of your intention by phone, email, WhatsApp, or post within the applicable period. This is 14 days for cancellations and 30 days for refunds.
Upon receiving your request, we will send you a confirmation and authorization to return the goods. Please include your original invoice number with your return. All items must be in a resaleable condition
Upon receiving your request, we will send you a confirmation and authorization to return the goods. Please include your original invoice number with your return. All items must be in a resaleable condition.
Return Shipping
You are responsible for returning goods using an insured and trackable shipping method at your expense. We will only consider refund requests if there is proof of delivery to Mellor Solutions Ltd trading as Mellor Online from your chosen courier. Once we receive the goods, we will issue a full refund minus any delivery charges.
If you cannot arrange a return, please contact us. We can arrange collection for you, but a fee will apply, which will be deducted from your refund.
Please note that delivery charges from the original purchase are non-refundable, as the service is completed once the order is placed.
Processed and Dispatched Orders
Orders that have already been processed or dispatched cannot be canceled; however, they can be returned for a refund once received by the customer.
We strive to facilitate a prompt refund process upon receiving returned items.
Return Address
FAO: RETURNS
Mellor Online
139 Manor Road
Ossett
West Yorkshire
WF5 0LQ
United Kingdom
Specific Terms
Your Statutory Rights
Your statutory rights are unaffected by the above terms. Consumers, excluding business trade customers, are further protected under the UK Consumer Contracts Regulations 2013.
For any questions, please contact our support department before returning any items.
Shipping Information: UK & Worldwide
UK Delivery:
International Delivery: