Weak HEAT - Please help - JeepForum.com

LinkBack Thread Tools
post #1 of 3 Old 05-17-2011, 07:14 AM Thread Starter
Registered User
2000 TJ Wrangler 
Join Date: May 2011
Location: Lansdowne
Posts: 8
Weak HEAT - Please help

2000 Jeep Wrangler, 2.5L 4 cyl

My heat was gradually becoming weaker (less hot). I brought it to a shop and my mechanic said it needed coolant/antifreeze. He flushed the coolant system and refilled it. The heat was working great. 500-1000 miles later the heat is losing steam again. It's barely warm enough to defog my windshield. Any thoguhts on how I might fix this myself, if at all possible? Thanks!


mreilly4 is offline  
Sponsored Links
post #2 of 3 Old 05-17-2011, 07:27 AM
Registered User
1992 YJ Wrangler 
Join Date: Sep 2006
Location: Pittsburgh
Posts: 2,459
Well, for starters, you should have posted this question here, http://www.jeepforum.com/forum/f9/

More on topic, when the engine is cool, pop the rad cap off and check the level. If its full, put the cap back on and start the engine. When it gets hot, see if the heater hoses on the firewall are hot. If one is significantly hotter than the other (with the heater on "hot" and fan on low) then you may have a plugged heater core. If both hoses are hot, then you may have an issue in the heater box with the blend door or its motor or the controls. I don't know the TJ's that well, but that should give you a place to start.

My SOA Build
Recovery Gear Basics
My BUDGET York OBA Install
Budget Welding Cart
Carling Contura Switch Panel

If it has tracks, tires or tits, its gonna cause a problem.

"Everytime someone "upgrades" a D35, an angel looses its wings."

"Dizzy" - What SnoopDog would call a Distributor if he was a mechanic. I cringe every time I hear this moronic term

Originally Posted by Warren Zevon
Send lawyers, guns and money. The **** has hit the fan...
92, 4.0, AW4, 8.8, D30, 15x10, 37's, SOA etc, etc
92, 2.5, 30, 8.8, 4.88, Locked, Winch, 15x8, 35's, 3.5" (RIP)
notmyj is offline  
post #3 of 3 Old 05-17-2011, 07:28 AM
Registered User
C2U5H's Avatar
2012 JK Wrangler 
Join Date: Aug 2004
Location: Westminster
Posts: 2,220
Hmm, maybe he didn't flush the system well enough? I was having problems with heat with my 4.0L, and I needed to replace my radiator due to a cracked pinch seam along the top. Replaced the radiator after flushing the entire system with a garden hose—which includes sending water down the inlet and outlet hoses to get the heater core in your flush. I had a bunch of weird colored stuff come out. Maybe drain the radiator, disconnect the outlet hose to the heater core and flush again? Or take it back to your mechanic and explain the problem, see if he'll flush again for free (doubt it).

2012 Crush JK Rubicon on 2.5" and 37s
- see sidebar
C2U5H is offline  

antifreeze , coolant , Coolant leak , heat

Quick Reply

Register Now

In order to be able to post messages on the JeepForum.com 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:


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.

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
Weak Jeeps Hardt114 General Discussion 17 03-06-2009 12:54 PM
Weak US Dollar Keith General Discussion 16 10-19-2007 01:17 AM
Your KungFu is weak ian-X General Discussion 8 10-12-2003 01:32 AM
Weak velcro on soft top NJJeeper General Discussion 3 12-18-2002 10:28 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 Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

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