A York S1-02435799000 Auxiliary Switch changes contact states to signal position changes and coordinate control response within the system.
The auxiliary switch provides an additional control point that changes circuit status as the main device operates, allowing the HVAC system to monitor position, trigger related components or confirm sequence operation. Its 1 NO/1 NC contact configuration and #6-32 mounting design matter because they support dependable switching, secure installation and consistent electrical response in heating and cooling equipment.
The auxiliary switch might need replacement if the heating and cooling unit shows intermittent operation, fails to complete control sequences or does not reliably signal connected components. Physical signs can include worn terminals, loose mounting or contact damage and environmental signs may include corrosion, moisture exposure or debris buildup that can affect switching performance.
Absolutely! Parts Town offers same-day shipping on in-stock real OEM HVAC parts Monday through Friday until 9 PM ET and on Saturday until 4 PM ET for online air orders. With updated inventory and streamlined processing, we'll ship your parts as soon as possible.
You can check the delivery status of your real OEM heating and cooling parts by heading to our Track My Order page and entering your order number or purchase order (PO) number and zip code. With 24/7 access to updates on your shipment, you'll always have the latest details right at your fingertips.
Yes! Parts Town offers a wide range of customer support 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 see all the ways to reach us with your questions.
We provide the option to return most new, unopened real OEM HVAC replacement parts within 90 days of delivery, so head to our Returns page to see if your order qualifies. For parts that have been installed and no longer work, fill out the form in the Defective Parts & Warranty Inquiries section.