heater not working.. - F150online Forums

Go Back  F150online Forums > Body > HVAC
heater not working.. > heater not working..

heater not working..


Old 10-06-2010, 08:23 PM
Junior Member
Thread Starter
Join Date: Oct 2010
Posts: 2
heater not working..

2001 F150 4.2 V6 heater not blowing hot air. does blow hot air for a few seconds, but then no more heat. turn off the heater and try again in a few minutes and again get a blast of hot air then it cools again. one of the hoses going to the heater core is significantly hotter than the other. backflushed the system and water is passing thru, but only about a 0.25" stream is coming out. am currently running flush thru the system. could it just be that the heater core is plugged...
Reply With Quote
Old 10-06-2010, 11:16 PM
Senior Member
Join Date: Mar 2005
Location: Louisiana
Posts: 784
Originally Posted by jw1028 View Post
could it just be that the heater core is plugged...
Good chance. Have you ever run stop-leak or anything through your system?
Reply With Quote
Old 10-07-2010, 07:15 AM
Junior Member
Thread Starter
Join Date: Oct 2010
Posts: 2
never put anything other than coolant/water. im guessing my next step if the flush doesnt work is to pull the heater core and replace? at least it's back up in the 70's here this weekend...
Reply With Quote
Old 10-07-2010, 07:39 AM
torkum's Avatar
Senior Member
Join Date: Dec 2005
Location: MT. JULIET,TN
Posts: 2,423
Replace the heater core before you really need it
Reply With Quote
Old 10-12-2010, 07:44 PM
Join Date: Mar 2010
Location: Arkansas
Posts: 54
I just had this problem with my 98 F150......i replaced the water pump and i have heat...my heater core was not plugged or leaking......new thermostat, and blend door is good........try to find an old post from 2006 from a guy called NOHEATDAVE...it deffinitely helped me....good luck
Reply With Quote
Old 10-17-2010, 11:19 PM
Join Date: Sep 2003
Location: Delaware
Posts: 13
If you only getting a fraction of what your putting into the heater core coming out it must be plugged. Is this something recent? Or have you noticed it gradually getting worse? if the heater core is severely clogged you might want to consider just replacing it.
Reply With Quote

Related Topics
Thread Starter
Last Post
Willy 2.7
Introduction Forum
11-06-2015 09:39 PM
09-24-2015 01:07 PM
1997 - 2003 F-150
09-17-2015 09:22 PM
Ross' Expeditio
V8 Engines
08-23-2015 07:44 PM
08-18-2015 11:21 AM

Thread Tools
Search this Thread
Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off


All times are GMT -4. The time now is 01:29 PM.

  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: