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Bubbling noise when I turn the vehicle off

Tiny
MICHIGALLI38
  • MEMBER
  • 2001 FORD EXPEDITION
  • V8
  • 4WD
  • AUTOMATIC
  • 1,796,445 MILES
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.
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Thursday, October 29th, 2020 AT 8:54 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,179 POSTS
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
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Thursday, October 29th, 2020 AT 1:26 PM

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