Have you tried turning it off and turning it back on again?
Yep, first thing I tried

Didn't work. The only way I can get the blower motor to shut off right now is to flip the breaker.
Mind has a "fan on" setting. Turn that off.
There is no "off". Only "Auto", "On", and "Circ". It is currently set to "Auto" and the system is "Off" (no heat, no AC) and the fan is STILL on.
My system has a setting to be always on at very low speed, set by the installer. Not accessible to the homeowner. Supposedly uses less electricity to let it run like that and speed up on demand rather than getting it going from a dead stop.
Not sure I believe it. I told him to set mine to turn all the way off. We have short time periods where we have the windows open.
Yeah, that's the "Circ" setting on mine. Runs the fan at 33% load at various times. I do not have that enabled at this time.
Fan has to be set to auto.
It is set to "Auto". The fan will not shut off even when I pull the thermostat off the wall.
on the back of the thermostat is the 4 digit installer master code. use it to log in under installer settings and adjust as needed, though this shoulnt be necessary. fan settings are attached to time periods in your schedule. you should try that first before you fuck up your dead band etc.
I went in under "ISU" which is system set up options. I also went through the programming options and there are no options to turn the fan on or off. It stays on "Auto" during the program sequence.
A little back story - My system only has 4 wires. W (White), Y (Yellow), G (Green) and R (Red). I snapped a pic of how these wires were set up on the original thermo and copied that set up to the new one (per the instructions). Turned off the mains before fucking with the wires, installed the new thermo and it worked great. AC kicked on right when it should've along with the blower. Except that when it got to temp (78 F) the blower kept on blowing. Thought it would kick off in a few second, maybe a minute but it ran all night. No matter what I did, short of flipping the breaker, it would just run. This morning I went back through everything, double checked the wiring, flipped the breaker on and off and it's still running. At this point I'm thinking it might be a bad relay on the blower motor itself.
Guess it's time to call the HVAC guy
