BMW 135is AC Isn't Working

Common Causes of AC Issues in Your BMW 135is and How to Restore Cool Comfort

Find Repair Location
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 BMW 135is 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.

Troubleshooting AC Issues in a BMW 135is

When troubleshooting AC issues in your BMW 135is, it's essential to adopt a systematic diagnostic approach. Begin by checking the refrigerant levels, as low refrigerant is a common culprit for inadequate cooling. Inspect the AC system for any visible leaks, which may appear as oily residue or pooling liquid beneath the vehicle. If refrigerant levels are sufficient, the next step is to examine the compressor. A malfunctioning compressor can prevent the system from producing cool air, and while some basic checks can be performed at home, more complex issues may require professional assistance. Additionally, inspect the condenser for clogs, as a blocked condenser can hinder the cooling process. If these components appear to be functioning correctly, consider the climate control system, as electrical issues can lead to inconsistent cooling. By starting with these straightforward checks, you can often identify and resolve common AC problems without needing to consult a mechanic, saving both time and money. However, if these DIY efforts do not yield results, seeking professional help is advisable to ensure a thorough diagnosis and effective repair.

What Are the Common Causes of AC Failure in a BMW 135is?

When dealing with AC failure in a BMW 135is, understanding the common problems can empower you to tackle the issue effectively. One of the primary culprits is low refrigerant levels, which can significantly hinder the cooling performance of your AC system. If you suspect this, checking for leaks and recharging the refrigerant may be necessary. Another frequent issue is a faulty compressor; if the compressor is not engaging or making unusual noises, it may need to be replaced. Electrical problems can also arise, so inspecting fuses and wiring connections is crucial. Additionally, clogged or dirty air filters can restrict airflow, leading to inadequate cooling, making regular maintenance essential. Lastly, issues with the condenser or evaporator can cause significant AC problems, so ensuring these components are clean and functioning properly is vital. By systematically addressing these common causes, you can diagnose and potentially fix the AC issues in your BMW 135is, restoring comfort to your driving experience.

Why is the AC Not Working in a BMW 135is?

When the air conditioning in your BMW 135is fails to operate, it’s crucial to address the issue promptly to avoid further complications. Common problems such as low refrigerant levels, a malfunctioning compressor, or clogged filters can escalate if left unattended, potentially leading to costly repairs or even complete system failure. For instance, if your AC is blowing warm air, it may indicate a refrigerant leak or a faulty compressor, both of which can worsen over time. Additionally, ignoring symptoms like strange noises or inconsistent cooling can result in more severe damage to the AC system, which may require professional intervention. Regular maintenance and immediate attention to any signs of trouble not only ensure your comfort but also protect your vehicle's overall performance and longevity. Taking a proactive approach to these issues can save you time and money in the long run, making it essential to diagnose and resolve AC problems as soon as they arise.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.