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Why is my AC blowing hot air Subaru?

If your Subaru's air conditioning system is blowing hot air instead of cool air, there could be a few potential issues. The most common causes include a refrigerant leak, a problem with the compressor, or an issue with the electrical system. Let's dive into the details to help you troubleshoot and resolve the problem.


Potential Causes of Hot Air from Subaru AC


Refrigerant Leak


One of the most common reasons for a Subaru AC blowing hot air is a refrigerant leak. The AC system relies on refrigerant to absorb heat from the air and cool it down. If there is a leak in the system, the refrigerant level will drop, and the AC won't be able to effectively cool the air. Refrigerant leaks can occur in hoses, seals, or other components of the AC system.


Compressor Issues


The compressor is the heart of the AC system, responsible for circulating the refrigerant. If the compressor is not functioning correctly, it can cause the AC to blow hot air. Compressor problems can be due to wear and tear, electrical issues, or a lack of lubrication.


Electrical System Problems


The AC system in your Subaru relies on various electrical components, such as the compressor, fans, and sensors. If there is an issue with the electrical wiring or a problem with the AC control module, it can prevent the system from cooling the air properly. Electrical problems can range from a blown fuse to a malfunctioning AC control unit.


Troubleshooting Steps



  • Check the refrigerant level and inspect the system for any leaks.

  • Examine the compressor to ensure it is functioning correctly and receiving power.

  • Inspect the electrical components, including fuses, wiring, and the AC control module.


If you're unable to identify and resolve the issue, it's best to have a professional mechanic diagnose and repair the problem. They can use specialized tools and knowledge to pinpoint the root cause and get your Subaru's AC system back to blowing cool, refreshing air.

How to tell if freon is low in AC car?


One of the most obvious signs that your vehicle needs a Freon recharge is that your vehicle will be blowing warm air, even after your vehicle has been running for some time. If your refrigerant gets too low, there will simply not be enough “coolant” to cool the air as it is passed through your evaporator coil.



Should I turn my AC off if it's blowing hot air?


One of the solutions to HVAC blowing hot air would be to turn off your unit, clean the condensation drain, and allow the coils to defrost before turning the system back on.



How expensive is it to fix AC in a car?


AC repair costs can vary widely, depending on the cause of the problem and the type of vehicle. On average, car AC repair costs run between about $430 and $520. However, if you need a new compressor, you can expect to spend $1,300 to $2,500 or more.



Why is my AC not blowing cold air in my car?


Your vehicle's air-conditioning not working is likely caused by a failing compressor or a freon leak. While these are the most obvious reasons for your air-conditioning not working inside your vehicle, it might be anything as simple as a bad belt or a dirty cabin air filter.



Do subarus have AC problems?


It appears that there is a known problem with one A/C compressor part number used on some Subarus in model years 2014 - 2016. For a couple weeks I had been hearing a ``moaning'' whenever the compressor's clutch engaged (rather than just the usual ``Click--Whirr''.



Should I turn off the AC if it is blowing warm air?


One of the solutions to HVAC blowing hot air would be to turn off your unit, clean the condensation drain, and allow the coils to defrost before turning the system back on.



Why is my car AC charged but blowing hot air?


It could be a number of issues, such as refrigerant leaks, faulty compressor or compressor clutch, blocked air vents, faulty thermostat, broken cooling fans, a blown fuse, electrical problems, a broken condenser and blower motor issues.



How do I fix my AC that only blows hot air?


If your AC is blowing warm air, start by checking the thermostat settings to ensure it's set to ``cool'' mode. Next, inspect the air filter for clogs and replace if necessary. Check the outdoor unit for debris blocking airflow and clean it if needed. Ensure all vents are open and unobstructed.



Why is my AC blowing hot air when it's on cold?


Common Causes of an Air Conditioner Blowing Warm or Hot Air
These can be due to clogging issues, electrical problems, low refrigerant, evaporator coil malfunctions, or compressor problems. If you've ever had the ac system in your car stop functioning, it's often due to a refrigerant leak or dirty coil.



How to fix a hot air conditioner in a car?


DIY Diagnosis and Quick Fixes

  1. First, check the cabin air filter condition and replace it if it's dirty or clogged.
  2. Check that the heater fan is blowing.
  3. Clean off the radiator.
  4. Check all the wiring connections for the AC system that you can access.
  5. Check the refrigerant level and top it up.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.