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View Full Version : Carrier Thermidistat with NO Display

rtaeger
Jul 20, 2008, 12:40 PM
I have a Carrier Thermidistat with NO Display.
hvac1000
Jul 20, 2008, 03:43 PM
Batterys?

Is the power to the inside unit on?

If the power is on then you might have lost a transformer OR blown a fuse on the circuit board if so equipped.