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Item #:
98428311
Johnson Controls A421ABC-06C Electronic Temperature Control, Single Stage
90% of respondents would recommend this to a friend
Item #:
98428311
XCD 485
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Imported from USA store
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Experience precise temperature control with the A421 Series, featuring a bright backlit LCD and easy setup for your heating and cooling needs.
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Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
Precise Temperature Regulation
The Johnson Controls A421ABC-06C offers accurate single-stage temperature control, ensuring optimal performance and energy savings for HVAC systems in both residential and commercial settings.
Long Sensor Reach
With a 19.5 ft. sensor cable, this control unit allows flexible installation options, making it ideal for varied environments where temperature readings are needed from a distance.
User-Friendly Interface
The intuitive design and easy-to-read display enhance usability, making installation and adjustments straightforward even for those with minimal technical expertise.
Product Details
| Brand Name | Johnson Controls |
| UPC | 696334315226 |
| Unit Count | 1 Count |
| Global Trade Identification Number | 10662011536618 |
| Manufacturer | Johnson Controls Inc |
| Number of Items | 1 |
| Item Type Name | Johnson Controls |
| Model | A421ABC-06C |
| Part Number | A421ABC-06C |
| Display Type | LCD |
| Operating Temperature | 212 °F |
| Color | Grey |
| Brand | Johnson Controls |
| Item Weight | 1 lbs (450 grams) |
Who Should Buy?
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HVAC Technicians
Ideal for HVAC professionals who require a reliable and precise temperature control solution for various installations.
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Refrigeration Systems
Beneficial for those managing refrigeration systems needing accurate temperature regulation for optimal performance.
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Industrial Applications
Suitable for industrial environments where electronic temperature control can enhance process efficiency and equipment longevity.
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Home Users
Not ideal for casual home users seeking simple, user-friendly temperature controls without complex features.
Product Description
Have any Query? Chat with us
Customer Questions & Answers
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Question:
What is the primary function of the Johnson Controls A421ABC-06C Electronic Temperature Control?
Answer: The Johnson Controls A421ABC-06C is designed to monitor and regulate temperature in a single-stage heating or cooling system. It ensures the desired temperature is maintained, providing comfort and efficiency. This model features a setpoint which can be adjusted based on user preferences. For example, in a greenhouse, it can help maintain optimal conditions for plant growth by preventing overheating or excessive cooling. -
Question:
Can the Johnson Controls A421ABC-06C be used in both heating and cooling applications?
Answer: Yes, the A421ABC-06C is versatile and can be employed in both heating and cooling setups. It allows for seamless transition between systems, making it ideal for environments that may require temperature regulation year-round. This capability is particularly beneficial in climate-controlled storage facilities, ensuring that fragile items are kept at favorable temperatures regardless of external conditions. -
Question:
What are the compatible systems for the A421ABC-06C controller?
Answer: The A421ABC-06C is suitable for single-stage HVAC systems, integrating easily with electric and gas-fired heating units, as well as HVAC air conditioning systems. The device's compatibility extends to various commercial and residential setups, including packaged units and split system air conditioners. This versatility makes it a go-to option for technicians working across different installations. -
Question:
How does the A421ABC-06C ensure energy efficiency?
Answer: The A421ABC-06C promotes energy efficiency by accurately controlling the operation of HVAC systems according to set parameters. By maintaining a stable temperature without unnecessary fluctuations, it reduces energy consumption. For instance, in a commercial kitchen, it can regulate temperature to minimize the operation time of cooling units, resulting in lower energy costs while preserving ingredients. -
Question:
What is the significance of the 19.5 ft. (6m) sensor lead on this control unit?
Answer: The 19.5 ft. (6m) sensor lead provides flexibility in installation, allowing the temperature sensor to be placed in an optimal location away from direct heat or cold drafts. This ensures accurate temperature readings. For example, in a large warehouse, placing the sensor farther from the HVAC unit can avoid misreading air temperature caused by proximity to vents, leading to more reliable climate control. -
Question:
Is the Johnson Controls A421ABC-06C suitable for residential use?
Answer: Absolutely, the A421ABC-06C is perfectly suited for residential applications. Homeowners can utilize this programmable controller to maintain ideal comfort levels in spaces like living rooms or basements. With the ability to set specific temperature goals, it enhances residents’ comfort while potentially impacting energy bills positively by optimizing HVAC operation. -
Question:
How user-friendly is the A421ABC-06C for installation?
Answer: The A421ABC-06C is designed for straightforward installation, featuring clear terminal markings that simplify wiring. Users with basic electrical knowledge can install it without professional assistance, following the provided instructions. For example, homeowners upgrading their thermostat can install the A421ABC-06C to enhance control over their HVAC systems with minimal hassle. -
Question:
What is the range of temperature control with the A421ABC-06C?
Answer: The A421ABC-06C typically operates within a wide temperature range, allowing for customized user settings. It can manage environments from highly specialized settings, like refrigeration units, to standard room temperatures in residential properties. This flexibility makes it particularly advantageous for those needing to accommodate specific climate requirements such as for laboratories, mortuaries, or food storage. -
Question:
Can the A421ABC-06C integrate with home automation systems?
Answer: Yes, while the A421ABC-06C is not inherently a smart device, it can be integrated with certain home automation systems through additional adapters or controllers. Users can achieve remote monitoring and control, allowing for greater convenience and efficiency. For instance, if connected to a smart home hub, homeowners can adjust their HVAC settings via smartphone apps, enhancing comfort from anywhere. -
Question:
Where can I buy Johnson Controls A421ABC-06C Electronic Temperature Control, Single Stage,19.5 ft. (6m) in Saint Lucia?
Answer: You can purchase the Johnson Controls A421ABC-06C Electronic Temperature Control from Ubuy in Saint Lucia. Ubuy offers a diverse selection of HVAC control products, ensuring you can find the right solutions for your heating and cooling needs.
Johnson Controls Temperature Controllers Editorial Review
The Johnson Controls A421ABC-06C Electronic Temperature Control offers precise single-stage temperature regulation, making it an excellent choice for those seeking reliable performance. With an operating temperature of up to 212 °F and an easy-to-read LCD display, this control unit stands out for its functionality and user-friendly design. Many users have praised its efficient operation and accurate temperature management in various settings. The compact design of only 1 lb makes installation straightforward, and it blends seamlessly into any grey decor, satisfying various aesthetic preferences. Overall, it's a dependable option that has garnered positive feedback from customers who value simplicity and efficiency.
Customer Reviews & Ratings
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Pros
- Precise temperature regulation for various settings
- Easy-to-read LCD display for convenience
- Lightweight design allows for easy installation
- High operating temperature of up to 212 °F
- User-friendly interface for better usability
Cons
- Limited color options available for customization
Platform Trust & Buyer Confidence
JK
Jasmin
Verified buyer
“Great products and very good service: very easy and very fast international delivery.”
9 September 2026 · via Trustpilot
AG
Anke
Verified buyer
“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”
10 September 2026 · via Trustpilot
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Hazel
Verified buyer
“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”
10 September 2026 · via Trustpilot
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Opaleye
Verified buyer
“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”
11 September 2026 · via Trustpilot
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Adele
Verified buyer
“Easy to find and order what you want on the website. Delivery is quick to the UK”
8 September 2026 · via Trustpilot
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Features & Benefits
- Single-stage temperature control with SPDT output relay.
- Bright, adjustable backlit LCD for clear visibility.
- Three-button touchpad for simple setup and user restriction.
- Temperature range of -40 to 212°F or -40 to 100°C.
- Options for standard and watertight, corrosion-resistant enclosures.
- Easy programming for both basic and advanced control applications.
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