1. Introduction
The Makerfire Digital Thermostat Temperature Controller is a versatile plug-in device designed for precise temperature management. It features an external temperature sensor, supports both heating and cooling modes, and includes advanced functions such as a programmable timer, temperature alarms, and multiple operating modes. This device helps maintain optimal temperatures for various applications while promoting energy efficiency.
The controller operates on AC230V 50HZ and has a maximum output of 16A 3680W.

Image 1.1: Front view of the Makerfire Digital Thermostat Temperature Controller with its external temperature probe.
2. Product Overview
2.1 Key Features
- External Temperature Sensor: Accurately detects and controls temperature.
- Heating and Cooling Control: Supports both heating and cooling equipment.
- Programmable Timer Function: Divide the day into 3 time periods with distinct temperature settings.
- Alarm Function: High and low-temperature alarms with buzzer and backlight flashing alerts.
- Multiple Operating Modes: Includes TC Mode (temperature control), TC + Time Mode (timer and temperature control), Time Mode (timer only), and Alarm Mode.
- Temperature Calibration: Allows for precise adjustment of temperature readings.
- Celsius/Fahrenheit Switchable: Easily switch between temperature units.
- Wide Compatibility: Suitable for greenhouses, reptile enclosures, incubators, aquariums, freezers, refrigerators, fermentation, and more.

Image 2.1: Visual representation of the controller's key features, including heating/cooling, timing, alarm, and calibration.
2.2 Components

Image 2.2: Diagram illustrating the main components of the temperature controller, including the display, control buttons (MODE, SET, UP/CLK, DOWN), power outlet, and external sensor probe.
- Display Screen: Shows measured temperature, set temperatures, time, and mode indicators.
- MODE Button: Cycles through operating modes and confirms settings.
- SET Button: Enters setting mode for parameters.
- UP/CLK Button: Increases values, adjusts clock, and mutes alarms.
- DOWN Button: Decreases values.
- Power Outlet: Connects to heating or cooling devices. Features a safety protection door.
- Sensor Probe: External probe for accurate temperature measurement.
- Indicator Light: Illuminates to show operational status.
3. Setup
3.1 Initial Connection
- Insert the external temperature sensor probe into the designated port on the side of the controller.
- Plug the temperature controller into a standard AC230V 50HZ power outlet.
- Connect your heating or cooling device (e.g., heater, fan) to the power outlet on the front of the controller.
Note: Some users have reported that the 3-pin plug may not fit all Japanese 2-pin outlets. An adapter may be required. The product is rated for 230V, but some reviews suggest it supports a wider range (100-250V). Please verify compatibility with your local power supply before use.
3.2 Temperature Unit Selection (Celsius/Fahrenheit)
The device supports switching between Celsius (°C) and Fahrenheit (°F). Refer to the operating instructions for specific button combinations to change the unit.
3.3 Temperature Calibration
To ensure accurate temperature readings, you can calibrate the sensor:
- Press and hold the MODE button for 4 seconds to enter calibration mode.
- Use the UP/CLK and DOWN buttons to adjust the temperature value.
- Press and hold the MODE button for 4 seconds again to exit calibration mode and save the setting.

Image 3.1: Illustration of the temperature calibration process using the MODE, UP/CLK, and DOWN buttons.
4. Operating Instructions
The controller offers four distinct operating modes: TC Mode, TC+Timer Mode, Timer Mode, and Alarm Mode. Press the MODE button to cycle through these modes.

Image 4.1: Overview of the four operating modes: TC Mode, TC+Timer Mode, Timer Mode, and Alarm Mode.
4.1 TC Mode (Temperature Control)
This mode controls the temperature based on a set start and stop temperature. It displays the current measured temperature, the temperature to start adjustment, and the temperature to stop adjustment.

Image 4.2: Display and setting method for TC Mode, showing current, start, and stop temperatures.
Setting Method:
- Press SET: The value to be adjusted will flash.
- Use UP/CLK and DOWN: Increase or decrease the value.
- Press MODE: Setting complete.
4.2 TC + Timer Mode (Temperature Control with Timer)
This mode combines temperature control with a timer function, allowing for temperature adjustments across three distinct time periods within a day. The display shows current temperature/time in sequence, the temperature to start adjustment, and the temperature to stop adjustment.

Image 4.3: Display and setting method for TC+Timer Mode, supporting three time-based temperature controls.
Setting Method:
- Press SET: Cycles through setting items (TC1 Time, TC1 Temperature; TC2 Time, TC2 Temperature; TC3 Time, TC3 Temperature).
- Use UP/CLK and DOWN: Increase or decrease the values.
- Press MODE: Confirms the current setting and automatically moves to the next setting.
This mode divides the day into three periods. The start time of TC2 is the end time of TC1. The start time of TC3 is the end time of TC2. The start time of TC1 is the end time of TC3. (If no time is set for TC3, the start time of TC1 becomes the end time of TC2).
4.3 Timer Mode
This mode functions as a standalone timer, allowing you to set specific ON and OFF times for connected devices. It displays the current time, the start time for timing, and the stop time for timing.

Image 4.4: Display and setting method for Timer Mode, showing current time, ON time, and OFF time.
Setting Method:
- Press SET: The value to be adjusted will flash.
- Use UP/CLK and DOWN: Increase or decrease the value.
- Press MODE: Setting complete.
Alarm Mute Function:
If an alarm sounds, press the UP/CLK button to silence the buzzer for 15 minutes.
Current Time Calibration:
Press and hold the UP/CLK button for 3 seconds to calibrate the current time.
4.4 Alarm Mode
This mode allows you to set high and low-temperature alarm thresholds. If the measured temperature exceeds these thresholds, an alarm will activate. The display shows the current temperature, the high-temperature alarm setting, and the low-temperature alarm setting. Initial values are 0°C and 40°C.

Image 4.5: Display and setting method for Alarm Mode, showing current temperature, high alarm, and low alarm settings.
Setting Method:
- Press SET: The value to be adjusted will flash.
- Use UP/CLK and DOWN: Increase or decrease the value.
- Press MODE: Setting complete.
Alarm Mute Function:
If an alarm sounds, press the UP/CLK button to silence the buzzer for 15 minutes.
5. Maintenance
5.1 Cleaning
To clean the device, wipe it with a soft, dry cloth. Do not use abrasive cleaners or immerse the device in water. Ensure the device is unplugged before cleaning.
5.2 Reset Function
If the product's display or operation is abnormal, you can reset it to factory default settings:
- Locate the small reset button on the device.
- Use a matching reset tool (e.g., a thin pin) to press the RESET button.
- The system will reset all parameters to their initial default values.

Image 5.1: Illustration showing the location of the reset button and the use of a reset tool.
6. Troubleshooting
- Device not powering on: Ensure the controller is securely plugged into a functional power outlet. Check the power source.
- Temperature not changing: Verify that the heating or cooling device is properly connected to the controller's outlet and is functioning correctly. Check the set temperatures and mode.
- Alarm sounding unexpectedly: Review the high and low-temperature alarm settings in Alarm Mode. Ensure they are appropriate for your application. Press the UP/CLK button to temporarily mute the alarm.
- Inaccurate temperature readings: Perform a temperature calibration as described in Section 3.3. Ensure the sensor probe is correctly positioned and not damaged.
- Plug compatibility issues: If the 3-pin plug does not fit your local outlet, a suitable adapter may be required.
- Display or function abnormalities: Use the reset function (Section 5.2) to restore default settings.
7. Specifications
| Specification | Value |
|---|---|
| Brand | Makerfire |
| Model (ASIN) | B0CZHX6JFN |
| Voltage | AC230V |
| Frequency | 50HZ |
| Max Output | 16A 3680W |
| Temperature Range | -40°C to 120°C |
| Temperature Control Type | Programmable |
| Controller Type | Hand Control |
| Package Dimensions | 14.6 x 8.5 x 7.2 cm |
| Package Weight | 0.21 kg |
| Battery Use | No |

Image 7.1: Detailed dimensions of the temperature controller and its sensor probe.
8. Warranty and Support
Warranty information for this product is not provided in the available data. For details regarding warranty coverage, please refer to the product packaging or contact the manufacturer directly.
For technical support, troubleshooting assistance, or any inquiries about the product, please contact Makerfire customer service or the seller from whom you purchased the device.





