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HVAC not cooling well in my Polestar 2 - is it refrigerant or something else?

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Mike T. · rep 0 · May 25, 5:24 AM · 1 replies · solved · Question

Vehicle: 2021 Polestar 2 Long Range Dual Motor

Hey everyone,

I've got a 2021 Polestar 2 Long Range Dual Motor, and lately, the AC hasn't been blowing as cold as it used to. It's not completely dead, but definitely weaker. I'm wondering if it's just low on refrigerant, or if there's something else specific to EVs I should be checking.

Is this a common issue? What are the typical causes for reduced cooling performance in these cars? I'm open to some DIY diagnostics if it's safe and straightforward.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 5:24 AM

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ClearTheCode admin answer:

Reduced HVAC cooling in your Polestar 2 can be due to several factors, some common to all vehicles and some specific to EVs. It's important to differentiate between the vehicle's refrigerant system (for cabin cooling) and the battery thermal management system's coolant.

Common Causes:

  1. Low Refrigerant (R1234yf): This is the most common cause for reduced cooling. Leaks can occur in hoses, seals, or the condenser.
  2. Clogged Cabin Air Filter: While this usually restricts airflow rather than cooling power, a severely clogged filter can impact overall HVAC efficiency.
  3. HVAC System Issues: Problems with the compressor, expansion valve, or condenser can also lead to poor cooling.
  4. Software Glitch: Occasionally, EV systems can experience temporary glitches that affect accessory functions like HVAC. A system reset might help.

When to See a Shop:

  • If you suspect a refrigerant leak: Refrigerant is a hazardous material and requires specialized equipment for proper handling, evacuation, and recharging. DIY attempts can be dangerous and harmful to the environment.
  • If a system reset (e.g., infotainment reboot) doesn't resolve the issue.
  • If you hear unusual noises from the HVAC system.
  • If the issue persists after checking the cabin air filter.

DIY Checks (Limited):

  1. Check Cabin Air Filter: Refer to your owner's manual for its location (often behind the glove box or under the dash). A dirty filter can restrict airflow. This is a relatively easy DIY replacement.
  2. Listen for Compressor Engagement: With the AC on high, listen for the compressor to engage. It may be less audible in an EV, but a lack of any engagement sound could indicate a problem.
  3. Visual Inspection: Look for any obvious signs of leaks around the AC lines or condenser (oily residue). However, many leaks are internal or not easily visible.

For any suspected refrigerant issues or deeper diagnostics, it's best to consult a certified Polestar service center or an EV-specialized independent shop. They have the tools to safely diagnose and repair the sealed refrigerant system.

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