--- product_id: 444656123 title: "Johnson Controls A421ABC-02C A421 Series Electronic Temperature Control, -40 to 212 Degree F Temperature Range, Single-Pole, Double-Throw" price: "586.51 DT" currency: TND in_stock: true reviews_count: 13 url: https://www.desertcart.tn/products/444656123-johnson-controls-a421abc-02c-a421-series-electronic-temperature-control-40 store_origin: TN region: Tunisia --- # Johnson Controls A421ABC-02C A421 Series Electronic Temperature Control, -40 to 212 Degree F Temperature Range, Single-Pole, Double-Throw **Price:** 586.51 DT **Availability:** ✅ In Stock ## Quick Answers - **What is this?** Johnson Controls A421ABC-02C A421 Series Electronic Temperature Control, -40 to 212 Degree F Temperature Range, Single-Pole, Double-Throw - **How much does it cost?** 586.51 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/444656123-johnson-controls-a421abc-02c-a421-series-electronic-temperature-control-40) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Full description not available ## Available Options This product comes in different **Configuration, Size, Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Rock solid continuous duty controller you can count on year after year. *by G***! on Reviewed in the United States on June 4, 2022* I've been using these for 8 years in an application where they switch constantly day and night. Combined with RIB relays to isolate the loads from the controllers, these have been flawless. These do exactly what they should do year after year. These harken back to a time when things were built to last and do the job they are supposed to do. It's a shame so many products fail to produce the bare minimum. I have 4 of these (actually the other 3 are pre Penn and one is pre 421 designation) running in various tasks in my house and will always go to Johnson Control (now Penn) for this application assuming they continue to build a quality product. ### ⭐⭐⭐⭐⭐ The A419 works best for some applications as it has a differential setting ... *by E***D on Reviewed in the United States on May 22, 2018* I have 2 A419 and 1 A421. I have used them at times control a fish smoker a heating pad for seedling starting and to control the blower on a gas heater. The A419 works best for some applications as it has a differential setting that follows a set point that has to be changed often as in smoking fish and I only have to make 1 adjustment each time. The A 421 works good for a set point that remains fairly constant as in a blower control for a heater. In using both the A419 and A421 I have a contactor for the final switching heaters for smoking. It seems the sensors are interchangeable which is a nice feature as I has one fail "sF" while smoking fish so I had a spare from one of the other ones not in use. ### ⭐⭐⭐⭐⭐ Boring... *by T***D on Reviewed in the United States on December 12, 2020* This is a boring product, as it should be. Once I deciphered the instructions and got it wired up and configured, it's worked without any fuss. The menu system isn't the most obvious, but once you figure it out, it's acceptable.Our fridge went out and I used this to convert a wine/beer fridge which only went down to 40F.I chose this over other cheaper ones because it has an anti-short cycle mode which is important for refrigeration to keep from damaging the compressor. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/444656123-johnson-controls-a421abc-02c-a421-series-electronic-temperature-control-40](https://www.desertcart.tn/products/444656123-johnson-controls-a421abc-02c-a421-series-electronic-temperature-control-40) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-06-06*