Heater not hot - VW Forum :: Volkswagen Forum
VW Forum VW Forum

» Auto Insurance
» Featured Product
Wheel & Tire Center

Go Back   VW Forum :: Volkswagen Forum > Volkswagen Models > MK3

MK3 Discussion area for the third generation Golf III and Jetta III produced from 1993 to 1999 including Cabrio models.

VwForum.com is the premier Volkswagen Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 11-27-2008, 08:41 PM
Junior Member
Points: 4, Level: 1 Points: 4, Level: 1 Points: 4, Level: 1
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Nov 2008
Posts: 1
Default Heater not hot

On my 1996 Jetta with 2.0L the heater is not working properly. It is blowing cold air. The blower is working properly. The vehicle is not having overheating issues. The hoses leading to and from the heater core are both as hot as the upper radiator hose. When the blower is on and I turn the hot to cold knob I can tell the air gets cooler when I switch from red to blue but the air is not hot or warm for that matter when it should be. The heater core is not leaking inside and the coolant level is always at the appropriate level. I am at a loss on what to do next to troubleshoot this issue.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 11-27-2008, 09:29 PM
Musicmaaster's Avatar
Super Moderator
Lifetime Supporting Member
Points: 2,639, Level: 31 Points: 2,639, Level: 31 Points: 2,639, Level: 31
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Sep 2008
Location: Alberta Canada
Posts: 603
Default

have you checked the thermostat? because for some odd reason they seem to make a difference....
__________________
96 Jetta GLS-Sold (unfortunately)

Now have a 2009 Dodge ram 2500 (but thats not stopping me from being here...seeing as how i did own a VW for a while!)
-Only because i live in alberta and we are truck guys out here!

Stereo Setup Sold with Jetta- However install in truck is starting to get into motion.
Plans
-ALL JL AUDIO, 2-12W3 subs, 1500W TMA Monoblock, 400W TMA fourchannel, 2 Sets of components, with Double din touchscreen and GPS ALL CUSTOM
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-28-2008, 07:14 AM
keehn's Avatar
Senior Member
Lifetime Supporting Member
Points: 6,910, Level: 54 Points: 6,910, Level: 54 Points: 6,910, Level: 54
Activity: 11% Activity: 11% Activity: 11%
 
Join Date: May 2008
Location: Kitsap, WA
Posts: 471
Default

The thermostat stuck open would also cause the engine to not warm up properly. OP: what kind of mileage are you getting, has it gone up, down, or stayed the same?

Something you can try is to add MORE coolant (if it needs it). This time though, turn your heater to full blast, blower fan as well. With the engine at idle, add more coolant to the reservoir, but sit in the cabin and rev the engine up to 3k (wait at least 5 minutes before rev...let the engine warm up slowly first). Hold it there for a few minutes and watch the temperature gauge go up to 1/2 way. The heater should be blowing very hot at this point. Check to make sure coolant is making it to the heater core by squeezing the heater hoses going into the firewall (directly behind the transmission bell housing). Also, after a few minutes of the engine at idle, the heater core hoses should feel hot to the touch. If not, then something is blocking coolant from entering the heater core.

The purpose of revving to 3k is to force the water pump to pump into the heater core. I had to do the same thing to get my heater core working, now it blows so hot, I have to keep the heater at 1/2 way, even that is too hot sometimes.

So try that before you change out the thermostat. If, while doing this, the engine doesn't seem to ever get to 1/2 way, then I would say the thermostat is to blame.

Let us know what you find.

Mike
__________________
Currently owned German vehicles:
2003 Volkswagen Passat GLX 2.8l
2003 BMW X5
2001 BMW R1200c (motorrad)

Previously owned German vehicles:
1996 VW Golf GL
1975 VW Microbus
1981 BMW 528i
1987, 1989, 1990, 1991 BMW 535i
1990 BMW 525i
1998 BMW 328i
1997 BMW 740il

"Non Sibi Sed Patriae"
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

  VW Forum :: Volkswagen Forum > Volkswagen Models > MK3

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the VW Forum :: Volkswagen 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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Engine Temp - How hot is too hot alltracturbo MK3 3 06-06-2006 12:55 PM
Block Heater cybicus MK4 4 01-11-2006 10:59 AM
heater colbster MK2 3 11-24-2004 06:02 AM
Heater on hot all the time koolworld MK1 4 09-09-2003 11:18 AM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 04:23 AM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.3.2
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
VWforum.com is a Volkswagen/VW Forum and enthusiast site and is not associated with VW/Volkswagen in any way.