Luke warm heat until set to 85+ - Ford Powerstroke Diesel Forum
Please Visit our Site Sponsors is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
LinkBack Thread Tools Display Modes
Old 11-14-2012, 05:58 PM
Compression Ignition Addict

Join Date: May 2011
Location: East Tennessee
Posts: 720
Thanks: 1
Thanked 24 Times in 4 Posts
Feedback Score: 9 reviews
Luke warm heat until set to 85+

Since the temps have started coming down, I've had to use the heat more in my '05. I was driving down the interstate tonight and the truck's digital HVAC was set to 80* and it still felt cool to me... it wasn't until I set the truck to 90* that it felt normal-ish again and was hot. It didn't seem to matter whether I was moving or stationary, the temp never felt right when it was set below 85*.

Before anyone claims head gaskets, let me give some more info:

- First, my degas has never puked.
- I have the degas bottle "full" at the lower mark and I haven't had to add any coolant.
- My ECT at cruising speed tonight was 180* (where its always been; even right after changing thermostats in May 2011 when I switched to ELC and did coolant flush)
- No loss in power
- Great mileage (19+ mpg @65mph)
- No smoke or other anomalies

After I got home tonight, I popped the hood, checked the level and unscrewed the degas cap to see if it seemed like there was an excess of pressure - There didn't appear to be... I have a pressure test kit for the cooling system but honestly don't see if being HGs this go around.

The only thing that has changed recently is I did replace my FICM last Saturday. Obviously, to change a FICM you have to really move the degas bottle out of the way quite a bit. Could that have disconnected something without causing a leak? How about the blend door? Is there a way to check it w/o tearing into the dash?

Any help would be great - We're supposed to be leaving for a cross country trip on Saturday!
Reply With Quote Quick reply to this message
Sponsored Links
Old 11-14-2012, 06:42 PM
McIntosh Sound System

Join Date: Sep 2012
Location: Central Valley, California
Posts: 1,577
Thanks: 12
Thanked 56 Times in 48 Posts
Feedback Score: 0 reviews
I know that people having been posting problems with their duct not shutting correctly and air is not going across heater core. Honestly not sure where to start but my guess is a shutter is froze up on yaa.
Someone will chime in, Nice mirrors BTW.............

Is the vacuum hose connected to heater core valve,look closely for it in the open and shut position. Good Luck with it.........
Reply With Quote Quick reply to this message
Sponsored Links

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
What state or province do you live in?
Security Question
*Required, this field is not shown to others. Enter the last two characters of the word "Powerstroke"
Security Question #2
*Required, this field is not shown to others. "While balancing on a piece of wood, two inches by four inches known as a 2x4, john and his friend sally both spotted a dalmatian inside a truck with sirens, headed to put out a fire. State the animal mentioned in the sentence above."
Please select your insurance company (Optional)


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 08:39 AM.

Powered by vBulletin® Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.