Could be your cabin air filter. When was the last time you had it changed. See Air Filtration System, under Climate Control in your "Owner's Manual". (The filter is hidden behind the glove box.).....
It depends on what is wrong with it. We need more info please.
If your 1998 Subaru Outback's AC is blowing hot air, it could be due to several issues. Common causes include low refrigerant levels, a malfunctioning compressor, or a clogged condenser. Additionally, check the AC system's fuses and relays, as these can affect its operation. It's advisable to have a professional inspect the system to diagnose and resolve the problem effectively.
It is in the fuse box under the hood (at least for the 1997 Subaru Legacy) Also for my 2007 Outback so you can assume that it is in the same place on most, if not all, modern Subarus.
The AC drain on a 2008 Subaru Outback is typically located on the passenger side of the vehicle, underneath the dashboard. You can find it protruding from the firewall area, allowing condensation from the air conditioning system to drain outside. If you're experiencing water accumulation inside the car, it may indicate that this drain is clogged and needs to be cleared.
To add refrigerant to a 2001 Subaru Outback, first ensure the vehicle is off and locate the low-pressure service port, typically found on the larger diameter aluminum line connected to the AC compressor. Remove the cap and attach the refrigerant can's hose to the port. Start the engine and turn the AC to the maximum setting, then slowly release refrigerant into the system while monitoring the pressure gauge on the can. Be cautious not to overfill and follow the manufacturer's specifications for the correct refrigerant type and amount.
To recharge the AC on a 2004 Subaru Outback, start by locating the low-pressure service port, usually found near the accumulator, and attach a refrigerant can with a gauge. Make sure the AC is set to the maximum setting and the engine is running. Open the can and allow the refrigerant to flow into the system, monitoring the pressure gauge to ensure it reaches the recommended level. After charging, check for any leaks and ensure the AC is blowing cold air before disconnecting the gauge.
The 2002 Subaru air conditioning drain line can be found on the bottom of the air conditioner compressor. The air conditioning drain line routes condensation to the bottom of the engine compartment.
The AC low side service port on a 2002 Subaru Outback is located on the passenger side of the engine bay, near the firewall. It is typically found on the larger diameter aluminum line that runs from the evaporator to the compressor. The port is usually capped and has a blue or black color. Be sure to check the vehicle's manual for specific diagrams and details.
Very likely that the ac compressor is locked up and the belt is slipping.
you need to replace the fuses in the computer
I had this problem about a year ago. Turned out to be all the bulbs were burnt out on mine. There's 3 (or 4) miniture bulbs that are accessed by removing the heater control.
The low pressure side port for a 2004 Subaru Outback is located on the larger diameter aluminum line, which runs from the evaporator to the compressor. Specifically, it can typically be found near the driver's side of the engine bay, close to the firewall. It is usually covered by a plastic cap and is identifiable by its smaller fitting compared to the high pressure side port. Always ensure the engine is off and the system is properly diagnosed before attempting to service the AC system.