Horn, cruise control, air conditioning

Sounds like the ac might need charging-it certainly would cost a lot less than a compressor. Sometimes it pays to start at the bottom,check out the simple less- costly DIY solutions first,maybe eliminating the those high end dealers prices Good Luck

Could be a leak in air-conditioning line or compressor on its way out does it squeal at all

You will need to know if the compressor is working when it blows hot air to proceed. It could be an electrical problem, a blend door problem, or the a/c clutch on the compressor.

First things first.....You must have the air conditioning system hooked up to an a/c system machine and then checked for leaks and also read low and high side pressures. If there are leaks then low Freon (R134a) content and low refrigerant oil can cause the a/c system to not engage the a/c compressor which basically means you will not have proper defrost functionality nor regular air conditioning. Most shops, when working with your air conditioning, will install air conditioning dye to assist them in locating leaks and is the first step in diagnosing all a/c systems. Post the findings after thw

The air conditioning is supposed to blow only cold air. Are you trying to get the heater to blow hot air? Make sure the temperature selector is in the hot position.

1.)If your System is OVERCHARGED this Will Occure due to the EVAPERATOR FREEZING UP
2.) Also if your HVAC Control Modual is Malfunctioning this will Aslo Cause this Condition, It Controls the BLEND DOORS that OPEN for COLD or HOT AIR Look Into these Items and Also Look Into wethrt the A/C Compressor Cycles OFF when it GETS OFF this Will POINT at the HVAC CONTROLER if it Cycles Off When Set For A/C or COLD Air

check freeon charge for ac ,,,overheat may be fan bad not coming on..while engine runs look to make sure it does

this may be due to a few things, it may be a bad blend door actuator, this is the motor that turns the door to give hot or cold air, the next thing is maybe compressor connection is loose or the system is low on gas. start the car and see if the compressor clutch kicks in then if it does try turning the temp control to hot then cold and see if that works maybe the blend door is stuck,

is the compressor turning? If not, replace the AC clutch relay. $11 at rockauto.com

Sounds like the compressor is weak. Replace it. Check pressure when hot .