Bubbling noise when I turn the vehicle off

2001 FORD EXPEDITION
1,796,445 MILES • V8 • 4WD • AUTOMATIC
Avatar
MICHIGALLI38
  • MEMBER
  • 1 POST
Was driving a short distance less than 3 miles and parked switched engine off and could hear bubbling noise for 10 to 15 minutes. Only with the A/C running with out the A/C I don't hear the bubbling noise. I mean the A/C running while driving then switch off and bubbling lasts for 10/15 minutes but if it is not in use before switch off I don't hear it after switching off.
Oct 29, 2020 at 8:54 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

That is from the A/C system and is nothing to worry about. The noise you hear after the compressor is turned off is the refrigerant moving through the expansion device and boiling in the evaporator. This continues until the pressure on both sides of the compressor (Hi and Low sides) are equal and the refrigerant has changed from a liquid back to a gas in the evaporator.

I hope that helps.

Take care,
Joe
Oct 29, 2020 at 1:26 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.