AC cools, warms, then cools again
Thread Starter
|
Junior User
Joined: Aug 2004
Posts: 54
Likes: 0
From: Delaware
AC cools, warms, then cools again
Hi,
I have a 97 f-150 4x4 4.9 litre eng. and when I turn on my AC it works fine for about 20 min. and then turns warm with a musty smell for about 5-10 min. and then it gets cold again. The freon levels seem to be OK but was wondering if it could be a cycle switch or something. Any info would be greatly appriciated.
Thanks, RShad
I have a 97 f-150 4x4 4.9 litre eng. and when I turn on my AC it works fine for about 20 min. and then turns warm with a musty smell for about 5-10 min. and then it gets cold again. The freon levels seem to be OK but was wondering if it could be a cycle switch or something. Any info would be greatly appriciated.
Thanks, RShad
Thread Starter
|
Junior User
Joined: Aug 2004
Posts: 54
Likes: 0
From: Delaware
Thanks for your quick responce. Just a slip of the keypad on the 4.9 I have a 4.6L engine. Is there much involved with changing the cycling switch? I think that is what a friend of mine had wrong once but it cost him like $120.00 in labor.
Thread Starter
|
Junior User
Joined: Aug 2004
Posts: 54
Likes: 0
From: Delaware
I picked up a cycling switch from ford but I am not sure it is the right one. Do I want the A/C clutch cycling switch or just the plain cycling switch. I don't have a picture that I can go by but I think one(clutch switch) has a round plug connector and one (cycling sw) has a oval connector.
Logistics Pro
Joined: Jul 2003
Posts: 3,595
Likes: 52
From: Lawton, Oklahoma
Your cycling switch should look like this...
Early Fords with R134 systems used one that looks like this...
http://www.clubfte.com/users/homerwi...clingearly.jpg
Early Fords with R134 systems used one that looks like this...
http://www.clubfte.com/users/homerwi...clingearly.jpg
Logistics Pro
Joined: Jul 2003
Posts: 3,595
Likes: 52
From: Lawton, Oklahoma
Your cycling switch should look like this...
Early Fords with R134 systems used one that looks like this...
Early Fords with R134 systems used one that looks like this...
Trending Topics
Thread Starter
|
Junior User
Joined: Aug 2004
Posts: 54
Likes: 0
From: Delaware
Thanks for you responce, the pictures helped alot. The switch that I have is a little smaller at the bottom where you use a wrench. I think this is the AC Clutch cycle switch (part # F5TZ-19D594-AA)that go's on the low presure line. I asked the parts guy for the AC Cycling swicth and this is what he gave me. Both switches are I guess cycling switches. I will have to get the other one tomorrow from Ford. Would you happen to know the Ford part number? I have a 4.6L eng. 4x4 F-150 Ext. Cab.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread Starter
|
Junior User
Joined: Aug 2004
Posts: 54
Likes: 0
From: Delaware
I changed the cycling switch and still have the problem. It gets very cold but after about 20 minutes or so while driving it go's warm for about a minute and then it gets very cold again. Could it be the high pressure cut off switch. Or possably something else.
Thanks
Thanks
Logistics Pro
Joined: Jul 2003
Posts: 3,595
Likes: 52
From: Lawton, Oklahoma
Ive seen this happen when a blend door controller is malfunctioning, but really you cannot afford to just keep popping on this and that... you need an accurate diagnosis WHEN the problem is occuring...
Thread Starter
|
Junior User
Joined: Aug 2004
Posts: 54
Likes: 0
From: Delaware
Thanks for all your help it's very appriciated. I am going on a trip on friday and I know that I can't get my truck in the shop for at least two weeks so I thought I would give it a try. I guess I will just have to live with it until I get back. Thanks Again.
Thread
Thread Starter
Forum
Replies
Last Post
diesel jim
Explorer, Sport Trac, Mountaineer & Aviator
3
Feb 12, 2016 05:12 PM
