No heat/defrost - Ford Powerstroke Diesel Forum
6.0L Problems Forum Having Trouble? Post here

Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10-29-2012, 07:48 AM
Powerstroke.org Fanatic
 

Join Date: Feb 2009
Posts: 145
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
No heat/defrost

I have an '04 w/ just under 200K on it. I've done an egr delete and replaced the oil cooler. I have no heat or defrost, regardless of idle or speed. I'm in the deep south, so our temps rarely get extremely cold, but when there's frost on the windshield, it's a safety issue. I'm not losing coolant that I can see and the controls and vents are working correctly. I don't have any gauges to go on re: actual operating temp except the dummy gauge inside. It seems normal to low. I normally use Ford gold coolant. I did flush it with distilled water and have been running that the last few days. The heater issue started last winter when it was full of Ford gold.

Any suggestions?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 10-29-2012, 09:10 AM
Premium Member

 

Join Date: Apr 2008
Location: shreveport, la.
Posts: 4,172
Thanks: 0
Thanked 112 Times in 94 Posts
Feedback Score: 0 reviews
I would check the vacuum actuated valve on the line going to the heater core, it's under the hood not the dash. Make sure the electric vacuum pump is working and there are no holes in the lines.
Reply With Quote Quick reply to this message
  #3  
Old 11-04-2012, 07:15 AM
Powerstroke.org Fanatic
 

Join Date: Feb 2009
Posts: 145
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
I checked the vacuum line and it seems to be in order. Or at least I think it's the correct line. This one is a small line that connects to a small round valve type apparatus on the heater hose. Is there another one that I'm not seeing?

I drove the truck last night for three hours. It took almost 45 minutes (according to the dummy gauge) to get almost up to normal temp, but the heater/defrost blew cold the entire trip, regardless of rpm, idle or speed. No heat at all, period.

What should I check next? I've read on here that it could be a thermostat or the water pump or a clogged heater core. I read somewhere else that it may be the blender switch under the dash.

Any suggestions?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 09:43 PM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors