Digital control for heating

[jdvier]

I am having a problem with the Digital control for the heating and ac on my 2011 3400RL. If I turn on the heat the AC comes on also. The instructions that came in the packet does not address this issue. Has anyone had this problem and how is it rectified?
Thanks in advance for any and all help.

[racerjoe]

If you kill the power to the control it might do a reset and start over.

[TAKPAK]

We have a 2011 3400 as well. We have not had any problems with ours yet. Furnace turns on as set, and the AC comes on as set. But, you have to change the mode to whatever you want, AC, furnace, fan only, or "off". The thermostat itself (I'm assuming yours is on the wall next to the stairs) only has a "telephone jack" (modular) style plug in the back of it with signal conductors in a shield that runs to the AC unit in the ceiling. The AC unit is what actually has all the wires from the T'stat, furnace, and the AC itself on a terminal block behind a panel. It wouldn't surprise me if one of those conductors got cross connected. Otherwise, it is supposed to be impossible to do both simultaneously, because you have to "tell" the control which mode to be in. I'd check the terminal block on the AC (accessable from the inside), and it could possibly be a bad control module there as well.

Hope this helps.

[Crooktail]

Had the same issue. I kept pressing the mode button until it read furnace at the top and the a/c went off.

[okierver]

had same problem with our 2011 323rl high country. i read in the directions for the conrtol and found out that the fan setting has to be set to auto. ours was on low and when we toggled thru the furnace mode and it lit the ac would also blow. switched the fan mode to auto and everything works as designed.