1985 T-Bird, Electronic Climate Control blinks?

I have a 1985 T-Bird ELAN 3.8L V6, and when I press ECON, or HI, AUTO, LOW MIX or DEFR the LED blinks. However, the heater blows hot air, and the AC blows cold air. The heater core has been changed, and AC recharged.

LOW does not blow air, AUTO, and HIGH does.

The Blower fan had sucked up some type of yellow filter. That was mess was removed.

What else could it be?

Thanks,

T-Bird

I would check the heater control unit itself. These are vacuum controlled. Sometimes the vacume hoses come loose or degrade.

Check the vacuum tree under the hood as well, it should be located on the firewall on the drivers side with about 4 or 5 hoses coming out, some may be caped, check to see if any came off or may if any are torn.

I have a 1985 as well and one of my vacuum hoses came off I only had the defroster no matter what setting I placed it on.

As for the yellow filter??? No idea where that came from.

Hope this helps,
Melfan