When the EU lever trim on a Detex exit device stops responding to your access control system, the solenoid is almost always the component at fault. The Detex 104209-2 Replacement Solenoid is the OEM-specified 24VDC fail-safe solenoid built for Detex electrified unlock lever trims, and it's the right part when you need the trim to restore proper electrical function without replacing the entire assembly.

This solenoid is a push-type unit, which is exactly what the fail-safe configuration requires. When voltage is applied, the solenoid locks the outside lever. When power is cut, whether from a scheduled access control release or a power failure, the lever returns to the free-turning position and egress is maintained. That's the core behavior of any fail-safe electrified trim, and it's what makes this solenoid the correct replacement in life safety applications where free egress during a power loss is a code requirement.

How to Identify the Right Solenoid in the 104209 Family

Detex uses a color-coded spiral tubing system to identify solenoids in the 104209 series, and knowing this saves you from ordering the wrong part. The 104209-2 is identified by its red spiral cover, which tells you at a glance it's the 24VDC fail-safe variant. The black cover is the 104209-1 (24VDC fail-secure), blue is the 104209-3 (12VDC fail-secure), and yellow is the 104209-4 (12VDC fail-safe). If you're looking at the existing solenoid inside the trim housing and see a red spiral cover, 104209-2 is your replacement.

The solenoid connection is not polarized, which simplifies the wiring during replacement. You don't need to track wire polarity, which makes this a cleaner repair for anyone servicing an existing installation in the field.

Compatible Applications and Trim Types

The 104209-2 is used within Detex EU (electrified unlock) lever trim across the Advantex and Value Series exit device families. This covers a range of door configurations including rim, surface vertical rod, and concealed vertical rod applications. These are the same exit device types you'll find securing high-traffic commercial doors in schools, hospitals, government buildings, and institutional environments where electrified trim is used to manage outside lever access through an access control system.

If you're sourcing this part as part of a broader service job, our exit devices catalog carries a full range of Detex and other brand components across rim, SVR, and mortise configurations. And if you're pairing this repair with any electric strike work on the same opening, you can pull everything you need in a single order.

Why This Part is Getting Harder to Find

The 104209-2 is a discontinued Detex part. Standard distribution channels have dried up for most of the 104209 solenoid family, which pushes facilities teams and locksmiths into hunting across multiple suppliers or settling for conversion options they'd rather avoid. We keep stock specifically for the commercial door hardware market and have been doing so since 2001.

Our price books and catalogs section includes the official Detex Trim EU catalog as a free download if you need documentation for your service records or installation notes.

Same-day shipping goes out on anything we have in stock, and orders over $450 ship free. Got a multi-door project or need quantity pricing? Call us at 845-935-0301 or email sales@securityparts.com and we'll work through it with you.

Before placing your order, take a quick look at our shipping and returns policy so you know exactly what to expect. And if you're sourcing additional hardware for this job, browse our complete parts catalog to get everything consolidated into one order.