Problem w/ intermittent defrost a/c -
LinkBack Thread Tools
post #1 of 3 Old 03-09-2019, 04:23 PM Thread Starter
Registered User
bradleyheathhays's Avatar
1996 XJ Cherokee 
Join Date: Mar 2008
Location: Lexington, KY
Posts: 333
Problem w/ intermittent defrost a/c

Have a '11 Crown Vic with 290k miles and I've been having a problem with the windows fogging up all the way around. The defrost seems to be working about half the time. On humid rainy days it'll work for say a half hour keeping the windows clear, then the windows will fog hard for 10-15 mins. And then it might decide to start working again, back and forth it goes. When I started it just now the compressor clutch turns when the a/c is turned on, although I haven't had a chance to observe it when the windows are fogging.

A secondary problem it has is that it only blows air through the vents on the front of the dash, straight out into the cabin. The air flows only very weak out the defrost vent at the windshield or the floor. It does this on all settings. Although this might contribute somewhat to the problem, it seems like the a/c does completely cut out as the windows will still fog hard with the a/c set to on and on full fan. When it cuts off the air in the cabin feels immediately humid. One that that helps somewhat is to turn the temp toward cooler and it seems to not fog as much and gives it a chance to maybe clear the fog some.

Any idea what's causing this or what I should do to start testing?

~~_/) ~~
bradleyheathhays is offline  
Sponsored Links
post #2 of 3 Old 03-10-2019, 08:33 AM
Registered User
2014 JK Wrangler 
Join Date: Oct 2017
Posts: 5,077
are you WAY of topic and forum - Crown Vic as in FORD?

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
jtec is offline  
post #3 of 3 Old 03-12-2019, 06:20 PM
Registered User
Join Date: Feb 2016
Posts: 201
And wasnt this asked and answered on pirate4x4.

Sent from my SM-G892U using Tapatalk
Devil15 is offline  

Quick Reply

Register Now

In order to be able to post messages on the forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Gas pedal a/c problem Red88 JK Wrangler Technical Forum 2 01-08-2019 06:52 PM
CRD PCM rubbing wire issue and A/C problem DieselForTwo WK Grand Cherokee & XK Commander Forum 6 06-06-2018 07:59 PM
Intermittent starting problem webspyyder WK Grand Cherokee & XK Commander Forum 4 04-11-2018 07:53 PM
A/C defrost blower switch 2001 Cherokee Dockgsp General Jeep & Off-Road Equipment 4 03-14-2018 07:32 AM
Intermittent Idle Problem 5.2L 97 Shooter-Mcgavin ZJ Grand Cherokee Forum 5 03-08-2018 09:36 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome