Research and development in the field of water heating and heat pumps
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We are a technology-based service company, engaged in the customized development of electric control solutions in the fields of water heating, electric heating and new energy.
R&d and Production Integrated Company
We have a strong R&D and design team, especially in the field of instantaneous electric water heaters with unparalleled advantages and experience.
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R&D test laboratory and production quality control AOI detector, ensure R&D quality control and production quality control
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We have a strong R&D and design team, especially in the field of instantaneous electric water heaters with unparalleled advantages and experience
Water heater control boards are the core electronic circuit boards inside electric water heaters that manage and regulate the heating process. They control essential functions such as temperature regulation, heating element activation, safety protections, user interface operation, and fault detection. These boards are typically produced through a turnkey PCB assembly service, which means one provider handles everything from component sourcing and PCB fabrication to assembly, testing, and quality control.
Choig offers a comprehensive range of water heater control boards designed for electric, gas, and tankless systems. Our control boards are essential components responsible for managing ignition, temperature regulation, and safety features in water heaters. With support for top heater brands and OEM or universal compatibility, Choig ensures reliable replacements backed by precision engineering and strict quality control standards.
| Product Name | Application | Control Features | Installation | Key Advantages |
|---|---|---|---|---|
| Instant Water Heater Control Board | Instant electric water heaters | Flow sensor input, fast heating, real-time temperature regulation | Plug-in PCB or embedded module | Compact size, fast response, energy efficient |
| Electric Boiler Control Board | Electric boilers (home/industrial) | Multi-stage heating, dry heating protection, voltage/current monitoring | Panel-mounted or screw-mounted | High power support, three-phase compatible, stable operation |
| Storage Water Heater Control Board | Tank-based water heaters | Thermostat control, timing, overheating protection | Rear-mounted or embedded | Reliable, low cost, compatible with wide range of tanks |
At Choig, we not only provide high-quality replacement control boards, but also offer OEM and custom development services tailored to your specific product requirements.
Whether you're developing a new line of water heaters or upgrading an existing system, our engineering team can work with you to:
Customize control board functions (temperature control, timing, display, safety logic)
Design circuit layouts to fit your product dimensions and installation needs
Integrate your brand’s UI/UX interface (LEDs, buttons, displays)
Ensure compliance with local safety and electrical standards
Provide full documentation and technical support for mass production
| Feature | Instant Water Heater Board | Electric Boiler Board | Storage Water Heater Board |
|---|---|---|---|
| Input Voltage | 120V / 240V | 220V / 380V | 220V |
| Power Support | ≤ 8kW | ≤ 36kW (3-phase available) | ≤ 3kW |
| Suitable Tank Size | N/A (tankless) | ≥ 50L | 10L–150L |
| Flow Sensor Support | Yes | No | No |
| Dry Heating Protection | Yes | Yes | Yes |
| Display / Interface | LED / Indicator | Digital / Button Interface | Indicator or Knob |
| Installation Type | Plug-in / Surface Mount | Panel Mount | Embedded Mount |
| Common Use Cases | Kitchen sink, hand wash, compact systems | Central heating, floor heating, industrial heating | Family bathrooms, kitchen hot water tanks |
Water heater fails to ignite or shuts off frequently
Error codes or blinking lights
Inconsistent heating
No power or LED signals
Electric Heating Control Board
An electric heater control board is the central controller for regulating heating elements, sensors, and safety mechanisms in electric water heating appliances. It ensures efficient temperature management and safe operation.
Choig specializes in producing electric heating control boards for water heaters, ovens, and boilers. With 10+ years of experience, we provide OEM/ODM PCBA solutions for global appliance manufacturers.
| Feature | Electric Heater Control Board | Electric Oven Control Board |
|---|---|---|
| Application | Electric water heaters (instant, storage, or commercial) | Electric ovens (household or commercial baking equipment) |
| Main Control Functions | Temperature regulation, dry-burn protection, water flow detection | Temperature control, baking timer, mode switching, preheating |
| Control Method | MCU + TRIAC or relay control | MCU + multi-relay control circuit |
| Voltage Range | 110V / 220V / 380V available | 220V (customizable for industrial voltages) |
| Typical Outputs | Controls heating elements, valves, flow sensors | Controls top/bottom heating tubes, fan, lamp, buzzer |
| Advantages | Versatile for various heater types, safety-focused, compact layout | Accurate temperature regulation, supports multiple baking modes |
| Custom Options | Logic, communication, UI panel, PCB size | Control logic, layout, voltage config, key functions |
| Recommended Use | For systems requiring water heating and dry-burn protection | For appliances needing timed, multi-stage heating control |
| Use Case | Recommended Board | Why It's Suitable |
|---|---|---|
| Household Instant Water Heater | Electric Heater Control Board | Compact and cost-effective, supports flow and temp sensing |
| Storage Water Heater | Electric Heater Control Board | Timer and temperature control ensures stable hot water |
| Commercial Water Heating System | Electric Heater Control Board | Supports high voltage (380V), robust safety logic |
| Household Electric Oven | Electric Oven Control Board | Allows temperature curve control, bake mode presets |
| Commercial Baking Equipment | Electric Oven Control Board | Multi-relay outputs for fans, heaters, timers in industrial ovens |
| Smart Home Integration | Both (customized) | Choig offers RS485/UART/IoT-ready interfaces as needed |
Dry-burn, overheat, leakage protection
Supports NTC, flow, and pressure sensors
LED, segment, or LCD interface options
Relay or Triac power control
Self-diagnostic and failure detection
Optional RS485 / UART communication
Choig provides full-stack PCBA development, including schematic design, layout, firmware, and production. We support:
Custom logic design for heating elements
Sensor integration: NTC, flow, pressure
Complete SMT assembly and testing
Batch manufacturing and inspection
| Design Aspect | Description |
|---|---|
| Control Logic | Multi-mode heating, timer, protection |
| Sensor Integration | NTC, flow, dry-burn, thermal fuse |
| User Interface | Buttons, LED segment, LCD |
| Firmware | Embedded C code, upgradeable |
| Communication | RS485, UART, optional BLE |
We support OEM/ODM development for heater manufacturers worldwide. Choig provides:
Custom PCB size and shape
Optional IoT connectivity
Label printing and case design
Integrated software + hardware support
Get in touch with our engineering team to start your custom control board project for electric heaters.
We are a technology-based company that integrates research and development, design and manufacture of water heating, electric heating, low temperature and constant temperature control and other household and commercial electrical controllers.
Heat pump control board is the central electronic component that manages and coordinates all operations of a heat pump system. It serves as the "brain" of the unit, responsible for executing control algorithms, interpreting sensor inputs, regulating compressor cycles, managing defrost sequences, controlling fan speeds, and handling communication with external systems such as thermostats or building management systems.
At Choig, each heat pump control board is designed to provide precise and reliable control for both residential and commercial HVAC systems. Whether used in air-to-water heat pumps, ground source systems, or hybrid energy solutions, the control board plays a vital role in optimizing energy efficiency, ensuring safety, and enabling smart functionality.
Temperature Regulation: Monitors temperature sensors and adjusts system output accordingly.
Compressor Control: Starts, stops, and modulates the compressor based on load demand.
Defrost Logic: Automatically detects frost conditions and initiates a defrost cycle.
Fan and Valve Control: Coordinates fan speed, expansion valve operation, and reversing valve switching.
Communication Protocols: Interfaces with thermostats or building management systems via RS485, Modbus, CAN, or wireless options.
Fault Detection: Continuously checks for operational errors and triggers alarms or shutdowns if needed.
| Application Scenario | Problem Solved by Heat Pump Control Board | How Choig's Control Board Solves It |
|---|---|---|
| Air Source Heat Pumps (ASHP) | Frequent frost accumulation reduces efficiency in cold climates | Integrated intelligent defrost logic with sensor-based cycle triggering ensures timely and efficient defrosting |
| Ground Source Heat Pumps (GSHP) | Poor coordination of pump and compressor leads to energy waste | Real-time temperature sensing and dynamic pump control reduce energy consumption and improve thermal balance |
| Commercial Central HVAC Systems | Complex systems with multiple compressors are hard to synchronize | Choig’s boards support multi-compressor coordination and staged startup logic, improving system stability |
| Heat Pump Water Heaters (HPWH) | Inaccurate tank temperature control results in overheating or underheating | Precision NTC temperature sensing and PID control maintain stable hot water delivery |
| Low Ambient Temperature Heat Pumps | System fails to operate below −10°C due to frost or compressor errors | Choig boards use extended temperature logic and robust start-up algorithms tested down to −25°C |
| Hybrid Heat Pump + Boiler Systems | Manual switching between energy sources causes inefficiency | Automatically prioritizes heat pump or boiler based on load demand and energy cost logic |
| OEM Custom HVAC Systems | Off-the-shelf control boards lack necessary interfaces or firmware | Choig provides custom I/O mapping, firmware development, and communication protocol support (RS485, CAN, Modbus) |
| IoT-Enabled Smart Heat Pumps | No remote diagnostics or OTA firmware updates | Choig offers optional Wi-Fi/Bluetooth modules for remote monitoring, error logging, and online firmware upgrade |
Choig provides full customization services for heat pump control board design to meet the specific requirements of OEMs and system integrators. From hardware circuit layout to firmware programming and communication protocol matching, all aspects of the board can be tailored to support unique HVAC system configurations.
With over 15 years of experience in control board manufacturing, Choig’s engineering team works closely with customers to optimize performance, reliability, and cost efficiency.
Drinking Water Treatment Control Board
Drinking water treatment control boards are crucial electronic components used in water filtration and treatment systems. These control boards manage the operation of pumps, sensors, filtration systems, and safety features, ensuring efficient and safe water purification. Whether it's for reverse osmosis, UV treatment, or filtration systems, the control board ensures smooth functioning, consistency, and reliable performance.
Choig offers a range of advanced drinking water treatment control boards designed for various water treatment systems. Our control boards are engineered for optimal performance, compatibility, and energy efficiency, making them the ideal choice for both OEMs and end-users seeking reliable replacements.
Precise Water Quality Control: Monitors flow rate, filtration level, and water quality to ensure safe, clean drinking water.
User Interface Integration: Supports LED or digital interfaces to monitor system status, filter life, and error codes.
Multi-Stage Filtration Support: Compatible with systems that use multiple filtration stages, such as sediment, carbon, and UV filters.
Safety Features: Includes low pressure protection, dry run protection, and system shutdown features to avoid damage and ensure user safety.
Energy Efficient: Designed for low power consumption without compromising performance.
1. Water Treatment Type:
Reverse Osmosis, UV Purification, Whole-House Filtration, etc.
2. Compatibility:
Ensure compatibility with your filtration system brand and model.
3. Key Features to Consider:
Flow Rate Control: For precise filtration processes.
Water Quality Monitoring: Features such as Total Dissolved Solids (TDS) sensors.
Safety Features: Low pressure, dry run, or filter change warnings.
4. Application Requirements:
Compact Systems: For under-sink units, choose smaller, energy-efficient control boards.
High-Flow or Industrial Systems: For larger systems, select boards that can handle higher wattage and more complex monitoring.
Choig specializes in providing both off-the-shelf and custom solutions for drinking water treatment control boards. We offer comprehensive OEM and engineering services to help you develop and manufacture control boards that meet your specific needs.
Our team can assist you with:
Custom Control Features: Tailored to meet the exact filtration process and safety needs.
Circuit Design: Ensure compatibility with your system's layout and installation requirements.
UI/UX Integration: Customize the display interface, from simple LEDs to advanced touch screens or mobile app integration.
Regulatory Compliance: Ensure all products meet local safety, electrical, and environmental standards.
Documentation & Support: Detailed manuals, technical support, and assistance throughout mass production.
Perform a Visual Inspection
Inspect the control board for burnt components, disconnected wires, or physical damage. Ensure all connectors are secure.
Reset the System
If your system has a reset function, try resetting the control board by turning off the power for a few minutes and then turning it back on.
Check Related Components
If there are issues with water flow, ensure sensors and water pumps are working correctly. If TDS readings are inaccurate, check the sensor connections.
Reflash or Update Firmware
For digital systems, update the firmware to the latest version. Sometimes a software update can resolve operational glitches.
Replace the Control Board
If all else fails, replace the faulty control board with a new Choig control board designed for your system's specifications.
Turn Off the Power
Always disconnect the system from power to avoid electrical hazards.
Remove the Access Panel
Open the control panel to access the existing control board.
Disconnect Wiring
Label and carefully disconnect the wires from the old board.
Install the New Control Board
Mount the new control board and connect the wiring as per the instructions.
Reconnect and Test
Power up the system and test the new control board for proper operation.
Whether you're looking for a reliable replacement for your water treatment system or need a customized control board for your application, Choig offers cutting-edge solutions that deliver performance, reliability, and safety. Explore our full range of drinking water treatment control boards to find the right solution for your system.
Cooling Fan Control Boards are essential electronic modules designed to regulate the speed, temperature response, safety protections, and overall operating logic of cooling fan systems. They ensure efficient heat dissipation, stable performance, and long-term reliability across home appliances, HVAC systems, industrial equipment, and automotive cooling solutions.
Choig provides a complete range of cooling fan control boards suitable for DC/AC fans, BLDC motors, evaporative cooling systems, refrigerators, air conditioners, and industrial ventilation equipment. All boards are engineered with high precision, stable performance, and strict quality control, offering both universal replacement models and OEM customization.
Automatically adjusts fan speed based on:
Temperature sensor (NTC)
System load
Humidity (for evaporative coolers)
Real-time feedback from BLDC motors
Overload protection
High temperature shutdown
Overvoltage/undervoltage protection
Dry-run protection (for evaporative cooling systems)
Motor stall protection
PWM modulation
Relay switching
Triac speed control
Digital or analog speed adjustment
Remote control / touch panel UI
Optimized drive algorithms ensure:
Smooth start
Low vibration
Quiet operation
Energy savings for long-term use
BLDC fans → choose PWM/FG feedback boards
AC shaded pole fans → choose triac/relay control boards
High-power industrial fans → choose high-current heavy-duty boards
12V / 24V / 48V DC
110V / 220V AC
Match motor wattage & startup current
Need multi-speed control?
Require pump output? (Evaporative coolers)
Require display or remote?
Need smart temperature sensing?
Home appliances → compact embedded boards
Industrial → metal casing, enhanced heat dissipation
Outdoor → protective coating, IP rating
We support full OEM customization to meet your product design:
Fan speed modes
Temperature or humidity control logic
Pump/timer modes
LED or LCD display control
Remote-control integration
Custom PCB size & installation holes
Special connector types
High-power design for industrial use
Custom UI/UX (buttons, switches, displays)
Laser printing / silkscreen
Private label or full product design
UL/CE/RoHS compliant designs
EMC optimization
Full documentation for mass production
Power off the device
Remove cover or access panel
Disconnect wiring (label cables for easier installation)
Install and secure the new board
Reconnect cables & test the system
Choig’s Cooling Fan Control Boards deliver high reliability, efficient heat dissipation management, and advanced protection features suitable for home appliances, commercial cooling, and industrial ventilation systems. Whether you need a replacement board or OEM-customized control solution, Choig provides professional engineering support and consistent product quality.
Foshan Shunde Choig Electronic Technology Co., Ltd. loated in CIMC Smart Valley Technology Park. We are a technology-based company that integrates research and development, design and manufacture of water heating, electric heating, low temperature and constant temperature control and other household and commercial electrical controllers.
We have a strong R&D and design team, especially in the field of instantaneous electric water heaters with unparalleled advantages and experience.
Our Advantage
Our company have rich experiences in water heating field, electric heating field and heat pump field. We have software engineer,hardware engineer, testing engineer and management engineer, which make our development project can be Creativity and stability.
we will evalute from our clients about the project on technical feasibility and cost feasibility. After confirmation from our clients we will start the development and we will make the samples testing in our side before delivery them to our clients. When our clients testing in there products with our control baords we will get the feedback and adjust according to the feedback and requirement till it is ok. till the whole project match your requirement. then the development will finished. Even if the customer has any adjustments or new requirements during use, we will continue to adjust the electronic control solution according to the customer's requirements until the project is terminated.
For the quality control on development, we have Rigorous development process, covering from design schematic review to component selection to final functional test and performance test. We have standard design specifications to ensure that every detail and requirement of our design is free of loopholes and flaws. We have The risk assessment table simplified from DEFEAM ensures that our solutions have sufficient awareness and prevention of various design and application risks in the application field
We have made many outstanding achievements in the fields we are good at, such as precise constant temperature technology in the field of instant water heater control, heating + shower + built-in water tank multifunctional control technology in the field of electric wall-mounted boiler control, and trigeneration control system in the field of heat pump We will make more technological breakthroughs in these and other areas to bring more and better experience and convenience to our customers.
Experienced Team
01
We have software engineers, hardware engineers, assistant engineers and project engineers, all of whom are elites in various professional fields for more than ten years. Can quickly understand and realize customer intentions and provide rigorous and practical electronic control solutions.
Perfect Testing Equipment
02
Testing is the necessary for development because we must confirm the control board is match the requirement of our clients and in the same time we must make sure our control solution Comply with industry standards. So the testing equipment can test our control boards functions and performance, for example Lightning surge test, high temperature and humidity test, anti-interference test, etc.We have We have a complete laboratory that can conduct multi-project tests and match the testing and verification under similar internationally accepted safety regulations and energy efficiency standards.
Rigorous and Complete service Awareness
03
Our technical service includes three stages. The first stage is the stage of communicating with customers about project development requirements. We will fully listen to customers' requirements, try to digest the technical difficulties and characteristics involved in the other party's requirements, and put forward reasonable suggestions based on our experience in order to achieve the best solution; the second stage is the project establishment and development stage. At this stage, we must not only strictly follow the development process and highly standardize the development standards, but also remember to fully absorb customers' opinions and improve the solutions during the testing process of both parties; the third stage is the after-sales service and project upgrade service stage. We humbly accept the feedback from consumers and the market collected by customers during the product sales process, further adjust and improve the solutions, make our solutions more suitable for customers and the market, and continuously investigate market needs to provide support for customers' further upgrade needs for solutions
Get Started with Scheme Design + PCBA
We provide one-stop service of scheme design + PCBA, integrating design and manufacturing, which can ensure that our electronic control board perfectly carries our design scheme.
Contact UsOur Advantage
Choig to Participate in the 2026 Feicon Exhibition in São Paulo.
Foshan Shunde Choig Electronics Technology Co., Ltd. to Participate in the 2026 Aquaflame Exhibition in Moscow , gaining insights into new industry trends.
Choig Expands in the Middle East: New Branch for Energy-Efficient Electronic Control Solutions
Feb. 26, 2026
In February 2026, Aquaflame, the highly anticipated global engineering exhibition for heating, ventilation, air conditioning, and sanitary ware, was held in Moscow, Russia. As Russia's largest international comprehensive engineering solutions exhibition, Aquaflame has enjoyed a successful 30-year history.
Jul. 28, 2025
Choig Expands in the Middle East: New Branch for Energy-Efficient Electronic Control Solutions
Recently, our company is preparing to establish a branch in the Middle East. This major strategic move marks a key step in the company's global layout process.