64 tbird cant get heat,blows just cold air.changed water valve,thermostat.this is an air car.is there a thermo switch under dash?

Sometimes heater cores clog. You have to disconnect your hoses at the fire wall and put a garden hose on the nipples and flush it out. I assume you have good engine temp.

AT THE CONTROLS NOTHING WORKS AIR CONDITIONER DOES NOT ENGAGE,CANNOT REGULATEAIR TO DEROST OR FLOOR,AIR BLOWS OUT OF BOTH,AND CANNOT REGULATE HEAT

Hi

there can be a number of reasons for this

I am sure I can help you diagnose this fairly easily.

call me on the tele here at work

715-884-6546

John R. Draxler
Thunderbird Ranch
http://www.tbirdranch.com
715-884-6546 days
jdrax@tds.net

Could be that your vacuum line is unplugged, or broken. It controls the whole shootin match.