Overview

The InkBird WiFi Temperature Controller is available in two models, ITC-306A which is the single stage heater control and the ITC-308 which is a dual stage model for controlling both a heater and a chiller. In both cases the robust controller features dual replaceable temperature probes, built-in alarms, a clear display, and Wi-Fi connectivity that adds a redundant layer of safety beyond relying on a heater thermostat alone. It connects to a 2.4GHz Wi-Fi network and integrates with the InkBird mobile app for monitoring and notifications.

This guide is specific to the ITC-306A Wifi Heater Controller but all of the features are pretty much the same between the single and dual stage model, with only slightly different programming requirements. 

• ITC-306A WiFi Aquarium Heater Controller - User Manual
• ITC-308 WiFi Dual Stage Temperature Controller - User Manual

InkBird ITC-306A WiFi Temperature Controller Specifications

• Temperature Range: approx. -40°C to 100°C (-40°F to 212°F)
• Display Resolution: 0.1°C/°F (below 100) and 1°C/°F (above 100)
• Accuracy: ±1°C (±2°F)
• Power Supply: 100-240VAC, 50/60Hz; load output max approx 1200W @ 110V (2200W @ 220V)
• Probe Type: Aquarium-grade probe suitable for humid environments
• Wi-Fi: Supports 2.4GHz only (not 5GHz)
• App Support: iOS and Android via InkBird App

Redundant Safety Features

The controller includes multiple layers of safety and redundancy to help protect aquarium life:

• Dual Outputs: Separate control for heating and cooling outlets (if using cooling equipment)
• High and Low Temperature Alarms: Alerts when temperature moves outside your defined range
• Probe Fault Alarms: Notifications if the probe fails or reads abnormally
• Temperature Calibration: Ability to offset probe readings to match a trusted reference thermometer
• Cooling Delay Protection: If controlling a chiller or compressor device, delay settings help protect the equipment from rapid restarts
• Remote Monitoring: App access and alerts provide an extra layer of response capability when you are away

Connecting to the InkBird App (Wi-Fi Setup)

1. Confirm your phone is connected to a 2.4GHz Wi-Fi network. If your router uses a combined SSID for 2.4GHz and 5GHz, you may need to temporarily force your phone onto 2.4GHz.
2. Install the InkBird App from the Apple App Store or Google Play.
3. Power on the controller and put it into pairing mode. The Wi-Fi indicator typically flashes when it is ready to connect.
4. Open the app and tap Add Device (often shown as a + icon).
5. Select the controller model from the list, then enter your Wi-Fi name (SSID) and password when prompted.
6. Wait for the app to confirm connection. Once connected, you should see live temperature, setpoints, alarm thresholds, and device status.

Troubleshooting tip: If pairing fails, confirm 2.4GHz Wi-Fi, double-check the Wi-Fi password, and retry pairing mode. If your router uses advanced security settings, try WPA2 during setup, then revert if needed.

Analog Setup (Without Wi-Fi)

If you prefer to set up the controller using only the front panel:

1. Plug the controller into power and confirm the display is active.
2. Locate the Set or Settings button to enter programming mode.
3. Set your target temperature (for example, 78°F for many reef systems).
4. Set your heating differential (how far below the target temperature the heater turns on). A small differential helps limit swings.
5. Set high and low alarm thresholds slightly above and below your setpoint to provide early warning.
6. Save settings and exit. The controller will switch the heating outlet on and off based on the probe temperature versus your setpoint.

Typical Heater Integration Step-by-Step

1. Choose a Stable Location: Place the heater in a section of the sump or aquarium with consistent water level and strong flow. Avoid areas where water level can drop and expose the heater to air.
2. Place the Probe: Mount the temperature probe in a high-flow area near where you want to control temperature. Keep it away from direct heater output to avoid false readings.
3. Plug the Heater into the Controller: Plug the heater into the controller’s heating outlet, then plug the controller into the wall outlet (or a properly rated power strip).
4. Set the Heater Thermostat Above the Controller Setpoint: Set the heater’s built-in thermostat a few degrees higher than your controller setpoint so the InkBird is the primary control.
5. Program Your Setpoint and Alarms: Set your target temperature, differential, and high and low alarms either in the app or on the controller.
6. Verify Operation: Watch at least one full heating cycle to confirm on and off behavior matches your settings.
7. Confirm Notifications: Trigger a test alarm (or temporarily adjust thresholds) to confirm app alerts and any audible alarms work as expected.

Frequently Asked Questions