Johnson Controls A421ABG-02C A421 Series Electronic Temperature Control with Pre Wired Power Cord, -40 to 212 Degree F Temperature Range,Silver
Key features
- •Electronic Single Stage Temperature Control, 120/240 VAC, UL TYPE 1, IP20, SPDT, with 12 amp power c
- •Featuresa lockable front-panel touchpad for setup and adjustment, and a Liquid Crystal Display (LCD)
- •Replaces the popular A419 Johnson Control model with upgraded technology.
- •The A421 controls provide heating or cooling control, sensor offset, temperature setback, adjustable
- •In stock - Ships FAST!
Johnson Controls A421ABG-02C A421 Series Electronic Temperature Control with Pre Wired Power Cord, -40 to 212 Degree F Temperature Range,Silver
List Price: $192.76$173.48DEALYou Save: $19.28 (10%)
Free shippingFree Returns – 30 daysFree Order CancellationSecure Payment2–3 Days DeliveryGet It June 22, 2026In Stock (10)No marketing spamNo account requiredFulfilment by FedEx / Amazon / UPS / ShipwirePayPal / Card Buyer Protection
Customer Reviews
Reviews sourced from verified Amazon purchasers4.5
out of 5
Based on 10 reviews
5★
70%
4★
30%
3★
0%
2★
0%
1★
0%
worked
jonenos✓ Verified Purchase•November 21, 2023
was able to program how i needed it to work. A spa alarm
Work on commercial refrigeration equipment
John Mullikin✓ Verified Purchase•November 18, 2023
Thermostats work nice you can set the dip differential where you want it. You can use it on heating control boxes. Or refrigeration units set your temp and your differential.
Holds a steady temperature
Daniel Norris✓ Verified Purchase•November 13, 2023
The instructions provided are not very clear on setting up the controller, but once you get it figured out it works great. I used this to turn a stand up freezer into a refrigerator for my backyard shop. It holds at a steady 38 degrees in a non-insulated metal building. Youtube is your friend when trying to set it up.
The A419 works best for some applications as it has a differential setting ...
E. Ford✓ Verified Purchase•November 11, 2023
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.
Works Great
WhyMe✓ Verified Purchase•November 7, 2023
Bought to replace the temperature control on an indirect water heater and does exactly what you tell it.
Instructions are fine and the basic menu options allow you to set everything most would ever need.
Relays may be cheap - not sure how much load I would trust them with - mine controls a separate pump controller so sees not load and will hopefully last.
Instructions are fine and the basic menu options allow you to set everything most would ever need.
Relays may be cheap - not sure how much load I would trust them with - mine controls a separate pump controller so sees not load and will hopefully last.
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