Low side service port is near the passenger side strut tower/firewall, high side service port is next to the passenger side of the radiator. Both should have black plastic caps. Caution: refrigerant is dangerous (can cause severe frostbite),
(In the USA) It is against the law to release into to the air/ or service the a/c system unless your are licensed.
Each car only takes a certain amount oz/lbs. operating pressures( need a/c gauge set or a/c machine), the wrong amount can cause damage.
When the vehicle is under acceleration it doesn't supply vacuum. The vacuum canister or reservoir holds a vacuum supply to operate vacuum operated accessories until the engine regains vacuum.
It is under the passenger side fender. You can get to it from underneath just in front of the front tire.
You may have a vacuum supply problem especially under acceleration. Check the vacuum supply hoses under the hood, from the engine, to the vacuum reservoir and through the firewall. You may find a cracked, split, pinched, collapsed hose causing decreased vacuum supply to the HVAC controls.
check in the trunk, or under the back seat.
under the hood!
Pass. side under the car.
The cowl is located under the bottom of your windshield and under the hood where your windshield wipers are.
Under the driver side fender
My guess is that you have a vacuum supply problem. Most HVAC systems operate off of a vacuum and if the vacuum supply is cut off the system goes to defrost by default, your most important function. Check under the hood for a cracked or pinched vacuum hose.
It is located on the left side under the dash; it is mounted behind the fuse panel.
The flasher relay in a 1994 Mustang is mounted under the hood. It is in a relay box right behind the battery
The Mustang has 2 fuse boxes. The lighter fuse is located under the dash on the drivers side. The fusebox under the hood is for the engine.