SPONSORED LINKS

Where is the check valve located?

Tiny
MBFOR99
  • MEMBER
  • 2000 FORD F-250
  • 5.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 230,000 MILES
Okay, my normally the A/C works great, but when I go into acceleration it goes to default which is defrost then comes back. Now I have that new valve but for the life of me I cannot find the location of that check valve. If you guys know where the valve may be located, please let me know. Thanks, Matt
SPONSORED LINKS
Saturday, April 2nd, 2022 AT 12:17 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Hi,

As you are aware, the HVAC is vacuum controlled. There could be a leak at any point in the system causing the vacuum to drop and the airflow to change direction.

When you say check valve, I'm not 100% sure what you are referring to. So, I attached a pic below showing the vacuum schematic for the system. Take a look through it and let me know the specific name of the component you are referring to. Once you let me know, I can locate it for you.

Take care,

Joe

See pic below.
Image (Click to make bigger)
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Saturday, April 2nd, 2022 AT 10:01 PM

Please login or register to post a reply.

Related Defroster Content

Vents Stay in Defrost Mode
GUIDE
Vents Stay in Defrost Mode
Your car's defroster is designed to remove moisture (fog) from the inside of the windshield in cold weather. It can be a safety problem if the defroster is not working, or...
VIEW MORE

Sponsored links