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Astoria 18551

Astoria 18551 Thermocouple Sit 0290003 L450 | Fits Argenta, Divina & Lisa

Regular price $19.89

This part ships directly from Astoria and stock is not guaranteed. Lead time averaging 3 to 5 business days for ground shipments, 1 to 2 business days for Overnight.

If unavailable, the item will be backordered. If you have any questions check parts sheets below description. Please email or chat to confirm availability prior to ordering.

Description Details

Astoria Thermocouple SIT 0290003 L450 (18551) is a precision-engineered replacement part designed specifically for Astoria espresso machines, ensuring optimal temperature regulation and enhanced brewing performance. Crafted with high-quality materials, this thermocouple offers reliable and consistent temperature sensing, which is critical for maintaining the precise thermal conditions required for perfect espresso extraction. Its 450mm length provides the ideal fit for a range of Astoria models, facilitating seamless integration and efficient operation.

This thermocouple plays a vital role in monitoring the temperature inside the espresso machine’s boiler, sending accurate readings to the control unit to modulate heating elements accordingly. By ensuring stable temperature control, it helps prevent overheating and underheating, which can negatively affect the flavor profile of the espresso. For commercial environments, such as cafes or busy coffee shops that rely on Astoria machines, installing this replacement thermocouple helps reduce downtime, maintain consistent drink quality, and extend the lifespan of the espresso machine.

Ideal for baristas, service technicians, and coffee shop owners who prioritize reliability and performance, the Astoria Thermocouple SIT 0290003 L450 (18551) offers a straightforward installation process and robust durability. Its compatibility with Astoria espresso machines guarantees that it meets the brand’s exact specifications, making it a trusted component for efficient maintenance and repair. Whether used as a preventive measure or a replacement part, it is an essential investment in sustaining top-tier espresso brewing standards.

Descriptions are for reference only. We do our best to fill in the blanks when manufacturers don’t provide descriptions, but details can vary. We strongly recommend checking with the manufacturer for the exact part number you need. Ordering based on the part number—rather than the description—is the best way to ensure compatibility.

Frequently Asked Questions

This Part #18551 fits Astoria machines, including the Argenta, Divina, Lisa series. Compatibility may be specific to the machine's production year and model. Please consult the technical PDFs and compatibility data on this page to confirm a match for your specific unit before finalizing your purchase.

Our current database shows fitment for the Argenta, Divina, Lisa series. However, many Astoria components are interchangeable across different platforms. If you have successfully installed Part #18551 on a model we haven't listed, please let us know so we can update our records for the community.

If you are unsure of the fit, do not guess. To prevent downtime, please view our Compatible Parts Diagrams to check the exploded view PDF for your specific unit, or message our parts team for assistance.

Parts from Astoria including this thermocouple sit 0290003 l450 ship directly from their warehouse. Please email or chat to confirm availability prior to ordering.
Yes. Part #18551 is a 100% genuine OEM component sourced directly from the Astoria factory. Using original parts ensures your equipment maintains its factory-spec pressure ratings and safety certifications.
Lead times for Astoria parts typically range from 3 to 5 business days depending on availability. Next Day Air parts usually ship within 1 to 2 business days.
All Astoria parts come with a 365-day manufacturer's warranty. Contact us for specific warranty details.
All Astoria parts come with a no returns, all sales final return policy. Please see our refund policy or chat for more details.

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