1998 Subaru Impreza Ac Isn't Working

Common Causes of AC Failure in Your 1998 Subaru Impreza and How to Restore Cool Airflow

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
37% chance it's the
Refrigerant Leak
0%
21% chance it's the
Climate Control Electrical Issue
0%
12% chance it's the
AC Compressor
0%
30% chance it's
Something else
The most common reasons a 1998 Subaru Impreza AC isn't working are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor.
  • Refrigerant Leak: A refrigerant leak can occur due to damaged hoses, seals, or connections, resulting in decreased cooling efficiency in the air conditioning system.
  • Climate Control Electrical Issue: A faulty climate control module or a blown fuse could be causing the electrical issues in the climate control system.
  • AC Compressor: A faulty AC compressor may be due to a lack of lubrication, electrical issues, or internal mechanical failure, resulting in inadequate cooling performance.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

What are the initial steps to diagnose the AC issue in a 1998 Subaru Impreza?

To diagnose the air conditioning issue in your 1998 Subaru Impreza, begin by checking the compressor clutch engagement. Start the engine and set the AC to maximum cool with the fans on high; observe if the compressor clutch engages. If it does not, use a voltmeter to verify power to the compressor. If voltage is present but the clutch remains inactive, the clutch may be faulty. Conversely, if there is no voltage, inspect the fuses and relays for any blown components or faulty connections. Next, ensure the serpentine belt driving the compressor is intact and functioning properly, as a slipping or broken belt can hinder performance. Utilize a manifold gauge set to check the system pressures, comparing them to the recommended values in your vehicle’s manual; low pressures may indicate refrigerant leaks. Look for visible signs of leaks around hoses and fittings, and consider using a UV leak detection kit for a thorough inspection. Additionally, confirm that the cooling fans are operational and that there are no obstructions affecting airflow over the condenser. Lastly, check the cabin air filter for clogs that could impede airflow. By systematically following these steps, you can effectively diagnose and address common AC issues in your Subaru Impreza.

What are the common problems that could cause the AC to stop working in a 1998 Subaru Impreza?

When dealing with a malfunctioning air conditioning system in a 1998 Subaru Impreza, it's essential to understand the common problems that could be at play. One frequent culprit is refrigerant leaks, often occurring around the O-rings of the AC compressor, which can deteriorate over time. Additionally, issues with the compressor clutch, such as wear or incorrect air gap, can prevent the clutch from engaging, leading to system failure. It's also important to check the AC relays and fuses, as faulty components can disrupt power to the compressor. A blocked or defective condenser can hinder refrigerant cooling, while a malfunctioning blend door actuator may affect cabin temperature control. Furthermore, a dirty cabin air filter can strain the AC system, reducing its efficiency. Low refrigerant levels can trigger the compressor to disengage, and in some cases, the compressor itself may fail. By systematically checking these areas, DIYers can effectively diagnose and address the AC issues in their Subaru Impreza, potentially saving on repair costs and ensuring a comfortable driving experience.

How urgent is it to repair the non-functioning AC in a 1998 Subaru Impreza?

When it comes to the urgency of repairing a non-functioning AC in a 1998 Subaru Impreza, several factors come into play that highlight the necessity of timely action. First and foremost, the comfort of the driver and passengers is significantly compromised without a functioning AC, especially in hot weather, which can lead to fatigue and distractions that may affect driving safety. Additionally, neglecting AC repairs can result in more severe issues down the line. For instance, if the problem stems from a refrigerant leak or a malfunctioning compressor, continuing to operate the vehicle in this state can exacerbate the damage, leading to costly repairs that could have been avoided. Simple fixes, such as replacing a blown fuse or recharging refrigerant, can be addressed quickly and affordably, while more complex issues may require extensive time and financial investment. Therefore, it is advisable to prioritize AC repairs not only for immediate comfort but also to prevent further complications that could impact the vehicle's overall performance and safety.

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1998 Subaru Impreza AC Not Working: Common Issues & Repairs