[walleye]

my furnace fan just continues to run. I have no control of heat or air. I see the call for heat or cooling on the thermostat, but no action with the furnace just the blower. any help?

 

[Doc Holliday]

Did you run it in heating mode before this happened?

 

[hvac benny]

Look for the flashing LED light on the control board, it's probably flashing a code that you can look up on the furnace door. Many newer furnaces run the blower continuously when there is a problem. Could be something as simple as a dirty flame rod or a bad hot surface igniter (HSI).