What to do if Johnson Controls TEC3030 shows 'Internal Sensor Fail'?
- RRalph YoungSep 9, 2025
Order replacement units and return the affected devices to Johnson Controls under the RMA program. This is due to an internal sensor failure on the TEC.

What to do if Johnson Controls TEC3030 shows 'Internal Sensor Fail'?
Order replacement units and return the affected devices to Johnson Controls under the RMA program. This is due to an internal sensor failure on the TEC.
What does 'Dehum Unavailable' mean on a Johnson Controls TEC3030?
If the Johnson Controls Controller displays 'Dehum Unavailable', order replacement units and return the affected devices to Johnson Controls under the RMA program. This is because dehumidification is unavailable due to a failed zone humidity sensor or an unreliable humidity reading.
What should I do if my Johnson Controls Controller shows 'Calibration Corrupt'?
If the Johnson Controls Controller displays 'Calibration Corrupt', order replacement units and return the affected devices to Johnson Controls under the RMA program. This indicates that the factory calibration data is lost or not installed.
What to do if Johnson Controls Controller displays 'Zone Temp Unreliable'?
If the Johnson Controls Controller displays 'Zone Temp Unreliable', order replacement units and return the affected devices to Johnson Controls under the RMA program. This indicates that all sources of zone temperature, including the onboard sensor, are unreliable.
How to fix 'The controller displays Controller Fault' on Johnson Controls TEC3030 Controller?
If your Johnson Controls Controller displays 'The controller displays Controller Fault', order replacement units and return the affected devices to Johnson Controls under the RMA program. This is because an internal fault was detected and the controller was unable to recover.
What does 'Controller Fault' mean on my Johnson Controls Controller?
Order replacement units and return the affected devices to Johnson Controls under the RMA program. This is due to an internal fault that the controller cannot recover from.
What does 'Board Mismatch' mean on my Johnson Controls TEC3030?
Match the baseboard to its corresponding CPU board. The error message on the TEC indicates the model number of the baseboard and CPU board. This issue appears because the baseboard and CPU board are paired incorrectly.
Why does my Johnson Controls TEC3030 show 'Supervisory Status = Offline'?
For wireless models, if the Supervisory Status is Offline, map the TEC into a JCI Supervisory system. Verify that the PAN’s WNC or WRG Gateway is online. Add ZFR182x or ZFR183x Routers/Repeaters into the wireless system. The supervisory controller is not communicating with the TEC, the TEC is not mapped to a JCI Supervisory System, or the WNC or WRG Gateway is not communicating with the TEC.
How to fix Outdoor Temp Fail on Johnson Controls Controller?
If you are experiencing an Outdoor Temp Fail error with your Johnson Controls Controller, it means the external outdoor air temperature sensor is either disconnected or has failed. Here's what you can do: 1. Check the sensor's wiring. 2. If the sensor was intentionally disconnected, reset the sensors through the menu. 3. If the issue continues, you should order replacement units and return the faulty devices to Johnson Controls under the RMA program.
Why are OA Lockouts Disabled on my Johnson Controls TEC3030 Controller?
If OA Lockouts are disabled on your Johnson Controls Controller, it means the local outdoor air temperature sensor has become disconnected or failed, or a network outdoor air temperature sensor has timed out. As a result, the controller is no longer shutting down equipment based on the OA lockout setpoints. Here's what to do: 1. If the outdoor air temperature source was a locally connected sensor, follow the troubleshooting steps for the Outdoor Temp Fail alarm. 2. If the outdoor air temperature source was a BAS, check the BAS to ensure it's online and providing the TEC with temperature readings. If you intentionally removed the BAS mapping, reset sensors through the menu.
| Brand | Johnson Controls |
|---|---|
| Model | TEC3030 |
| Category | Controller |
| Language | English |
Details FCC Part 15 compliance for Class B digital devices in residential settings.
States compliance with Canadian Interference-Causing Equipment Regulations.
Lists included parts and provides guidance on optimal controller placement.
Step-by-step instructions for physically installing the thermostat.
Visual guides for connecting the thermostat to HVAC systems.
Personalizing the thermostat's home screen appearance and display options.
Explains the meaning and function of all touchscreen icons.
Managing user lockout levels and utilizing the USB port for firmware.
Accessing and performing initial controller setup tasks.
Configuring HVAC modes, economizer availability, and related parameters.
Adjusting control modes, fan operation, and temperature setpoints.
Setting occupancy schedules and managing occupancy modes.
Configuring dehumidification, optimal start, and motion sensing.
Configuring auxiliary outputs and scheduled fan circulation.












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