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Stephanie RomanJul 31, 2025
How to fix Carrier CRC2 - NTC Thermostat with no LCD display?
- KKaren ClarkJul 31, 2025
If your Carrier Thermostat's LCD display is not working, it might be due to mis-wiring of the 12-volt power to Room Controller 2. After disconnecting the power, correct the wiring and re-cycle the power. It could also be due to the power not being online; verify the wiring to the Room Controller 2 and then re-cycle the unit power. Finally, check for 12 volts between P and G of the terminal block; if there's none, after disconnecting the power, correct the wiring and re-cycle the power.
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