Heater blowing cold air - Ford Powerstroke Diesel Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 26 Old 12-18-2012, 07:26 AM Thread Starter
Compression Ignition Addict
 
Join Date: Jan 2011
Posts: 255
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Heater blowing cold air

i've done some research on here regarding this issue already and i'm not sure what to try next.

what it's doing is simply blowing cold air. the temperature doesn't change at all no matter where i turn the temp control knob. it's done this before where it works one minute and the next it doesn't. my boy and i were driving around on sunday and i noticed it was getting cold in the truck so i started cranking up the heat.....or at least i thought i was. nope, no heat!

after looking on here, i checked my coolant level. it was low, so i added more coolant/water and kept my fingers crossed hoping this was my issue. nope! still no heat.

what can i look at next to try and track this problem down?
wide body is offline  
post #2 of 26 Old 12-18-2012, 08:53 AM
Compression Ignition Addict
 
04hdfatboy's Avatar
 
Join Date: Oct 2010
Posts: 4,614
Thanks: 16
Thanked 96 Times in 94 Posts
Mentioned: 0 Post(s)
Quoted: 4 Post(s)
Feedback Score: 0 reviews
What is your coolant temperature? It could be a stuck open thermostat.

08 F350 cc/sb 4X4
h&s minimaxx, 5" flo pro, 4" down pipe, no limit cold air intake, dirty diesel EGR delete with intake elbow, 6.0 exhaust manifolds, custom up pipes, ported intake manifold, Apex 71mm LP turbo, Rudy's cold side pipe, diesel site coolant and transmission filter, diesel site intercooler boots, ccv mod, bilstein shocks, gogo dd solenoid, HID lights, Airdog II 165, PMF traction bars, PMF drag link, moshimoto aluminum radiator
04hdfatboy is offline  
post #3 of 26 Old 12-18-2012, 08:56 AM Thread Starter
Compression Ignition Addict
 
Join Date: Jan 2011
Posts: 255
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
it tends to run about 190-199. i did notice on my way to work this morning that it went to 201. it's probably 85% highway miles.
wide body is offline  
post #4 of 26 Old 12-18-2012, 08:58 AM
Compression Ignition Addict
 
04hdfatboy's Avatar
 
Join Date: Oct 2010
Posts: 4,614
Thanks: 16
Thanked 96 Times in 94 Posts
Mentioned: 0 Post(s)
Quoted: 4 Post(s)
Feedback Score: 0 reviews
It might be worth changing the thermostats to see if that helps

08 F350 cc/sb 4X4
h&s minimaxx, 5" flo pro, 4" down pipe, no limit cold air intake, dirty diesel EGR delete with intake elbow, 6.0 exhaust manifolds, custom up pipes, ported intake manifold, Apex 71mm LP turbo, Rudy's cold side pipe, diesel site coolant and transmission filter, diesel site intercooler boots, ccv mod, bilstein shocks, gogo dd solenoid, HID lights, Airdog II 165, PMF traction bars, PMF drag link, moshimoto aluminum radiator
04hdfatboy is offline  
post #5 of 26 Old 12-18-2012, 09:05 AM Thread Starter
Compression Ignition Addict
 
Join Date: Jan 2011
Posts: 255
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
do you know what the normal operating temps should be?

i read something about a "blend door" where some folks are getting hot air on one side and cold on the other. I just checked that as well, and i'm not having that problem either. i don't have the climate control buttons, i have the temp dials so i don't know if that could even be possible.

i re-checked my coolant level (since it was dark when i filled it) and it's still down about an inch below the "max" line. would that be enough to keep the heater from working?
wide body is offline  
post #6 of 26 Old 12-18-2012, 09:08 AM
Compression Ignition Addict
 
04hdfatboy's Avatar
 
Join Date: Oct 2010
Posts: 4,614
Thanks: 16
Thanked 96 Times in 94 Posts
Mentioned: 0 Post(s)
Quoted: 4 Post(s)
Feedback Score: 0 reviews
your temps are normal. My truck runs around 194* depending on the ambient temps. I think the blend doors are only on the dual climate control but i am not for sure. I would guess if the coolant is low it could affect the heater but if its an inch low i dont think it would be that. On the new degas tanks they lowered the fill line about an inch anyway.

08 F350 cc/sb 4X4
h&s minimaxx, 5" flo pro, 4" down pipe, no limit cold air intake, dirty diesel EGR delete with intake elbow, 6.0 exhaust manifolds, custom up pipes, ported intake manifold, Apex 71mm LP turbo, Rudy's cold side pipe, diesel site coolant and transmission filter, diesel site intercooler boots, ccv mod, bilstein shocks, gogo dd solenoid, HID lights, Airdog II 165, PMF traction bars, PMF drag link, moshimoto aluminum radiator
04hdfatboy is offline  
post #7 of 26 Old 12-18-2012, 09:14 AM Thread Starter
Compression Ignition Addict
 
Join Date: Jan 2011
Posts: 255
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
got it. it sounds like my hope for a simple fix is quickly disappearing

i have a call in to one of the local ford dealers to see if they will cough up any ideas. i was going to try and find the heater core and see if the coolant lines coming and going were hot but i can't even find the damn thing! any ideas there?
wide body is offline  
post #8 of 26 Old 12-18-2012, 09:18 AM
Compression Ignition Addict
 
04hdfatboy's Avatar
 
Join Date: Oct 2010
Posts: 4,614
Thanks: 16
Thanked 96 Times in 94 Posts
Mentioned: 0 Post(s)
Quoted: 4 Post(s)
Feedback Score: 0 reviews
The heater core is on the firewall on the passenger side. It should be behind the oil dipstick in that area

08 F350 cc/sb 4X4
h&s minimaxx, 5" flo pro, 4" down pipe, no limit cold air intake, dirty diesel EGR delete with intake elbow, 6.0 exhaust manifolds, custom up pipes, ported intake manifold, Apex 71mm LP turbo, Rudy's cold side pipe, diesel site coolant and transmission filter, diesel site intercooler boots, ccv mod, bilstein shocks, gogo dd solenoid, HID lights, Airdog II 165, PMF traction bars, PMF drag link, moshimoto aluminum radiator
04hdfatboy is offline  
post #9 of 26 Old 12-18-2012, 09:22 AM Thread Starter
Compression Ignition Addict
 
Join Date: Jan 2011
Posts: 255
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
i'll take another look, but i can't even hardly see anything in there! even if i find it, i'm not sure i can get my hand in there....lol.

do i need to remove the air intake to get to it?
wide body is offline  
post #10 of 26 Old 12-18-2012, 09:24 AM
Compression Ignition Addict
 
04hdfatboy's Avatar
 
Join Date: Oct 2010
Posts: 4,614
Thanks: 16
Thanked 96 Times in 94 Posts
Mentioned: 0 Post(s)
Quoted: 4 Post(s)
Feedback Score: 0 reviews
There was a video on youtube and the guy just took off the glove box and got to it from there from inside the truck. It was for the 99-07 superduty's. Not sure if its the same for ours tho.

08 F350 cc/sb 4X4
h&s minimaxx, 5" flo pro, 4" down pipe, no limit cold air intake, dirty diesel EGR delete with intake elbow, 6.0 exhaust manifolds, custom up pipes, ported intake manifold, Apex 71mm LP turbo, Rudy's cold side pipe, diesel site coolant and transmission filter, diesel site intercooler boots, ccv mod, bilstein shocks, gogo dd solenoid, HID lights, Airdog II 165, PMF traction bars, PMF drag link, moshimoto aluminum radiator
04hdfatboy is offline  
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:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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

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