Does the AirCycler® g2 have power?

You can determine that device is powered if the LCD display is illuminated.  
If it is not illuminated, check the common wire connection. "C" must be connected to "C" on the furnace.  

Why is the EXH icon flashing?

Why is my AirCycler® g2 running constantly?

Check your thermostat. If the air handler is running when it shouldn't, check to make sure the thermostat FAN switch is set to AUTO and not ON and that it is not calling for heating or cooling.  

How do I test my AirCycler® g2?

Testing the AirCycler® g2 is an easy two-step process using our Testing Guide. Click here to open the Testing Guide and follow the instructions as directed.

My AirCycler® g2 has a blank display.

1. The furnace has power
2. The thermostat is operational
3. The furnace will call for heat from the thermostat
4. The fan operates with a fan only signal from the thermostat
5. Confirm the furnace is providing 24 VAC to the AirCycler® g2
6. Verify wiring conforms to wiring diagram
7. Make sure top is firmly seated in the base
   
   

My AirCycler® g2 turns furnace fan on and off, but the motorized damper does not cycle.

1. Verify that the AirCycler® g2 is providing a 24 VAC signal to the motorized damper
2. Verify that 24 VAC motorized damper is operational by powering directly with a 24 VAC signal
3. Verify continuity in the wiring between the damper and the AirCycler® g2

My AirCycler® g2 turns on during fan cycling calls. 

1. Verify wiring conforms to wiring diagram
2. Verify the G wire is properly connected
3. The G wire needs to be interrupted by the AirCycler®.  Do not run the G wire parallel.