Ac only works on hi setting???

heater fan motor has a relay
or vacuum or electronic motor works the internal flaps

if it is the fan motor
how to replace one
2006 Toyota Corolla Removing AC Heater Blower

the blower motor defect or there is something cut in the fan or inside the heater duct.

U can check by blocking off both lines to heater core if still over heats its something else. good luck.

normally when your defroster and heater or ac dont works, you need to replace your AC/Heater
headunit. you can go to a junk yard and get a second hand for like 50 bucks.

There is an actuator that moves the diverter that makes the noise.

See this thread for a how-to fix.

http://www.titantalk.com/forums/titan-problems-dealer-service/105851-how-fix-annoying-clicking-heater-ac-actuator-under-dash-w-pics.html

As for the beeping noise, could be the tire pressure sensor. When it beeps, look for a yellow warning light that looks like this ( ! ) Means you have a tire that is low on air.

Sounds like the head unit is going bad, or there is a vacuum leak. If you recently had any work done under the hood look around for a disconnected vacuum line, usually a piece of small hard plastic tubing leading to a rubber hose connector.

check the fuse

Hi
Check for bad connection at heater resistor or try tapping heater motor lightly
with ignition switch on and heater switch on. Could be heater switch connection.

it could be that fan rester went out. pick up a repair manual from Napa. look to see if you need to take the dashbord out. some of this are lockated betewn the fire wall and the blower moter housing. i have had a hard time looking for on on the internet.

hi there it sounds to me that the bearings are going bad on your ac/c compressor

you can bypass it by getting a smaller belt
to get a size you can take a piece of string or rope and go around the remaining pulleys like alternator power steering and crank shaft then tie a know take it to napa and have them match as close as possible then install that belt this will solve your problem until you replace the compressor
the other way is go to a salvage yard look for you make and model without a/c there will be most likely a pulley and bracket in the place of the a/c compressor
take a picture of the set up and take the pulley off including the mount bolts and then remove th compressor on your car and install the pulley and you can use the same belt
don