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AC Not Blowing Cold in 2019 Regal GS - Strange Noises Too

0

Mike T. · rep 0 · May 25, 2:48 AM · 1 replies · solved · Question

Vehicle: 2019 Buick Regal GS

My 2019 Buick Regal GS's air conditioning has stopped blowing cold air. It just pushes out ambient temperature air, even when set to the lowest temperature. On top of that, there's a strange clicking or gurgling noise coming from behind the dash when the AC is on.

I checked the cabin air filter, and it looks okay. Could it be a refrigerant leak, or something more serious like the compressor? The car has about 60,000 miles on it. Any advice on what to check first?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 2:48 AM

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  1. Check Refrigerant Levels: The most common reason for AC not blowing cold is low refrigerant. This could be due to a slow leak in the system. A professional can check the system pressure and look for leaks using UV dye or a leak detector. A gurgling sound can sometimes indicate air or low refrigerant in the system.
  2. Inspect the AC Compressor: The compressor is the heart of the AC system. If it's failing, it won't pressurize the refrigerant. Listen for the compressor clutch engaging (a distinct click) when the AC is turned on. If it's not engaging or if there are grinding noises, the compressor might be faulty.
  3. Blend Door Actuators: The clicking noise you hear could be a failing blend door actuator. These small motors control the flaps that direct airflow and mix hot and cold air. If an actuator is stuck or broken, it can prevent cold air from reaching the cabin or cause persistent noises.
  4. Condenser and Evaporator: The condenser, located in front of the radiator, dissipates heat. If it's blocked by debris or damaged, it won't cool the refrigerant effectively. The evaporator inside the dash absorbs heat from the cabin; if it's clogged or leaking, it will impair cooling.
  5. When to See a Shop: Diagnosing AC issues can be complex and often requires specialized tools to safely handle refrigerants and pinpoint leaks or component failures. It's best to take your 2019 Regal GS to a certified mechanic or Buick dealership. While there aren't specific OBD-II codes for "no cold air," HVAC modules can store diagnostic trouble codes (DTCs) like B0100 (HVAC Control Module Communication Error) or B0101 (HVAC Control Module Internal Fault) if there's an electrical issue with the system. Early diagnosis can prevent minor issues from becoming major, costly repairs.
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