Cannot change the direction of my fan...

It sounds like the fan is set to circulation. Circulation mode is a fan setting which will automatically turn the fan (only) on and off at preset intervals. Example, On for 10 min/Off for 20 min in a continuous cycle. When circulation mode is turned on, the fan icon will blink, spin, etc., indicating the mode is active. To turn this mode off repeatedly press the fan button until AUTO is displayed.

The fan relay is stuck closed. Get a new one and change the part that looks like it

shut it off, an get up there and see if it has a directional switch, to make it go forward or back wards. also be sure the blades are not upside down on fan motor. the reverse switch should be on the fan motor housing so it can be reversed.

what you actually need to do is have the fan on ie. spinning (albeit in the wrong direction) then press and hold the change direction button. after about 10 seconds or so the fan will slow down and then start to spin in the opposite direction.

it's silly they don't make this clear in any of the instruction manuals.

Hello. In the winter you do not want the air coming directly at you, instead you want it to be pulled away from you and mixed with the other air in the room.

Regards, Joe

PS kindly rate my answer. thank you.

Check the cooling fan, its sensor, the relay, the fuse. On most cars the fan is not needed on the highway, but engine overheats it it doesn't switch on inside the city. Also, clean the system with a special liquid according to the directions on the can and use coolant after that, water causes corrosion. While pouring/filling/cleaning, keep the heat switch on max heating to allw circulation via the heating radiator.

Is the unit on the return side or the supply side of your system ?
Is the system upflow or downflow?
You are right in your assumption about the air needing to be drawn through the Humidifier, now before changing the direction of the motor, we need to look at if the unit should be moved to the other duct, its alot less complicated, now when the fan comes on from the furnace, you have no trouble heating the house right ? if that is the case then moving the humidifier to the other duct would be your best bet, if your heating for some reason is only comming out of the return then yes you will need to change direction on the fan, but I would bet that moving it would do the trick for ya, I have only run into a couple of fans that actually were running the wrong way, thats why I asked, well anyways, you will need some tin, zip screws, tin snips, maybe a little more wire, let me know what ya find, I really appriciate your question back to me, anymore question please ask ! thanks again.
mr.grzz

The switch on the right side of the T87 is for the fan. Down is the auto position which will cause the fan to run only when needed. Up is the always-on position, used to circulate the air constantly. If you want to shut down all heating cooling associated with this thermostat you need to look at the switch on the left side of the stat. To the right is heating, center is OFF, and left is ac.

I think there are two fan switches on the 99 but I don't recall for sure. At some point during the B5 chassis run (96-01) they went from two two-wire switches to a single integrated switch. It's possible that you have the two switch design and only changed one of them. Also, your fan clutch could be shot. If you spin the fan, it should spin one revolution or less and then stop. If it spins freely the clutch is shot and needs replacement.

The first knob controls the temperature. Turning it counterclockwise will lower the temperature, clockwise will raise it. Pressing the button will turn on the circulate function (recirculates the air from the cabin).
The second knob controls the fan speed. Counterclockwise will reduce the fan speed, clockwise will increase it. Pressing the button activates the A/C compressor (allows colder temperatures).
The third knob controls the flow direction. Each picture indicates where the flow will go. Pressing the button activates the rear defoggers (in some models, it will also activate the heated side mirrors).