A421AEJ-02C Johnson Controls Temperature Control
KKM Solutions is an independent parts distributor, not an authorized Johnson Controls dealer — how we source.
Overview
Part number A421AEJ-02C from Johnson Controls, listed in Temperature Sensors. KKM Solutions quotes this part with pricing and availability confirmed per order.
Overview The Johnson Controls A421AEJ-02C is a single-stage electronic temperature control designed for efficient temperature management in HVAC and refrigeration applications. It features a high-impact, thermoplastic Type 4X (NEMA) watertight and corrosion-resistant enclosure suitable for surface mounting, and comes equipped with a 120 VAC piggyback power cord for simple plug-in installation. Features Easy-to-read, bright, adjustable backlit LCD screen displaying temperature, parameters, and operational status. Simple three-button touchpad user interface for direct basic and advanced programming. Single-pole, double-throw (SPDT) output relay to control heating or cooling equipment. LED status indicator providing real-time visual feedback on the output relay status. Adjustable anti-short cycle delay to protect compressors from short cycling and hard starts. Temperature setback and sensor offset capabilities for custom scheduling and error correction. Restricted adjustment mode to lock parameters and prevent unauthorized user changes. Specifications Supply Voltage: 120 VAC, 50/60 Hz Temperature Control Range: -40 to 212°F (-40 to 100°C) Power Consumption: 1.8 VA maximum Enclosure Rating: Type 4X (NEMA) / IP66 watertight, corrosion-resistant thermoplastic Input Signal: Includes an A99BB-200C PTC temperature sensor with a 6.6 ft. (2.0 m) cable Wiring Connections: Piggyback single power cord and plug combination Applications On/off control of boilers, chillers, and heating/cooling systems. Temperature monitoring and alarming functions in commercial settings. Condenser fan and cooling tower fan control based on fluid or ambient temperatures. Control of supply, makeup, and mixed air temperatures in HVAC units. Temperature management for commercial refrigeration equipment such as walk-in coolers, display cases, and reach-in boxes.
Product details
| Manufacturer | Johnson Controls |
|---|---|
| Manufacturer part number | A421AEJ-02C |
| Product category | Temperature Sensors |
Request a quote for this part
Email orderdesk@kkmsolutions.com or call (825) 454-5367 for pricing and availability.
Frequently Asked Questions
How much does A421AEJ-02C cost?
A421AEJ-02C is listed at CA$396.27 (CAD) and can be ordered directly from this page with Add to Cart. That figure is a reference price and can change: your card is authorized at checkout and charged only once our order desk confirms the part, stock, and final price, and we email you first if anything has moved. Larger quantities or custom terms — email orderdesk@kkmsolutions.com for a volume quote.
Who manufactures the A421AEJ-02C?
A421AEJ-02C is made by Johnson Controls and is listed in our Temperature Sensors category. KKM Solutions is an independent distributor, not an authorized Johnson Controls dealer: we source the exact Johnson Controls part number A421AEJ-02C, and the quote confirms condition and lead time before you order.
Is the A421AEJ-02C new and genuine?
Parts we supply are new and genuine unless the quote expressly states otherwise. Where a part is surplus, new-old-stock, refurbished or open-box, the quote says so before you approve it.
What warranty comes with the A421AEJ-02C, and can I return it?
Parts we supply are warranted against manufacturing defects for 1 year from the date of delivery; where the manufacturer's own warranty is longer, the manufacturer's warranty applies. The warranty covers repair, replacement, or credit of the defective part and does not cover normal wear items, misapplication, improper installation, or consequential damages. Contact us within 30 days of delivery before returning anything — all returns need a return authorization from the order desk.
What is the lifecycle status of A421AEJ-02C?
No published lifecycle status is on file for A421AEJ-02C. Johnson Controls lists whether a catalog number is current, superseded or end-of-life on its own product page, and our order desk confirms the status with the manufacturer at quote time, before you commit. Send the part number through the quote form on this page.
How quickly can A421AEJ-02C ship?
Lead time for A421AEJ-02C is quoted per order and confirmed on your quote, which our order desk sends within 1 business day. For a line-down emergency, call the 24/7 order desk at (825) 454-5367.
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