AC whistle
Thread Starter
|
New User
Joined: Mar 2021
Posts: 5
Likes: 0
AC whistle
So, before I get hounded for not searching, I have looked at many threads that sound similar but none address the issue I am having.
when I turn on my AC with either of the A/C settings on the dial, there is not cold air, but more concerning for me is the sound that accompanies this. There is a whistle that comes from the vents I dependent of speed. In park or on the highway it is the same. This whistle is not constant. It comes for a few seconds and is gone for a few more. It is not rhythmic, but rather random timing. Almost sounds like a dog begging at the table. I have not been running the AC as a result this. I want to take it to a mechanic but I’m curious what to expect and/or see if there’s anything to check first. I will post up a video today so you can hear for yourself. Thanks in advance.
the truck is a ‘93 XLT 2wd 5.8L
when I turn on my AC with either of the A/C settings on the dial, there is not cold air, but more concerning for me is the sound that accompanies this. There is a whistle that comes from the vents I dependent of speed. In park or on the highway it is the same. This whistle is not constant. It comes for a few seconds and is gone for a few more. It is not rhythmic, but rather random timing. Almost sounds like a dog begging at the table. I have not been running the AC as a result this. I want to take it to a mechanic but I’m curious what to expect and/or see if there’s anything to check first. I will post up a video today so you can hear for yourself. Thanks in advance.
the truck is a ‘93 XLT 2wd 5.8L
Mountain Pass
Joined: May 2019
Posts: 204
Likes: 10
Also, when the blower is out check the evap for blockage. The fact that the a/c is not blowing cold may or may not be the same issue. If your compressor is engaging you may have an issue with the blend door which could case both symptoms you are having also.
Thread Starter
|
New User
Joined: Mar 2021
Posts: 5
Likes: 0
Trending Topics
Fleet Mechanic
Joined: Aug 2015
Posts: 1,835
Likes: 363
From: Candy Mountain
My fist guess is that there is a vacuum leak in the cab. The system uses a combination of electrical and vacuum systems, so there is a fair amount of vacuum tubing, connections, motors, and the switches that could be leaking.
One way to confirm or deny would be to disconnect the vacuum feed line from the intake manifold, cap the port on the manifold, and see if your whistle is gone.
One way to confirm or deny would be to disconnect the vacuum feed line from the intake manifold, cap the port on the manifold, and see if your whistle is gone.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post