Heater output not great when its .....Cccold! - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


2000-2005 Discuss your 2000-2005 Bonneville SE, SLE, and SSEi Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 01-15-2007, 05:47 PM   #1
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Aug 2003
Location: Edmonton, Alberta, Canada
Posts: 52
Thanks: 0
Thanked 0 Times in 0 Posts
Jayman is on a distinguished road
Default Heater output not great when its .....Cccold!

Hello everyone, has anyone experienced this issue at all. Lots of coolant in the system. This car came from the west coast and I'm starting to wonder if they used a 180* stat in her. When the temp is cool it will do just fine, however when it drops down to -20*C or colder it has a hard time keeping the cabin comfortable.
Just wondering what I should check before looking at the thermostat.
Thanks
Jayman is offline   Reply With Quote
Old 01-15-2007, 05:54 PM   #2
Senior Member
True Car Nut
 
Join Date: Jul 2004
Location: Twin Falls, Idaho
Posts: 7,545
Thanks: 0
Thanked 1 Time in 1 Post
Hans is on a distinguished road
Default

Do you have good airflow the heat is just not warm?

You could have a stuck open thermostat if the engine temp is cold all the time.

If everything else checks out it could be the airmix door actuator. It could also be a corroded heater core.
Hans is offline   Reply With Quote
Old 01-15-2007, 06:31 PM   #3
Senior Member
True Car Nut
 
Join Date: Oct 2002
Location: Groton, CT _NEBF 05, 06, 07_
Posts: 2,703
Thanks: 0
Thanked 0 Times in 0 Posts
markwb is on a distinguished road
Default Re: Heater output not great when its .....Cccold!

Quote:
Originally Posted by Jayman
however when it drops down to -20*C or colder it has a hard time keeping the cabin comfortable.
Wow Does the engine temperature as read on the IC make it close to 200 degrees? or the metric equivalent? Maybe you need to block a section of radiator.
markwb is offline   Reply With Quote
Old 01-15-2007, 08:12 PM   #4
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Aug 2003
Location: Edmonton, Alberta, Canada
Posts: 52
Thanks: 0
Thanked 0 Times in 0 Posts
Jayman is on a distinguished road
Default

You know I don't remember the exact number on the gauge, but it sits just between a quarter and a half when its fully warmed up (I'll check it out and do the conversion later). I don't think blocking off part of the rad will help as it doesn't get much better when she'* sitting still.
Air flow is good, actual temp is just not very warm. I'll check the heater hoses later on to see if there is heat going in and coming out.
Failing that I suppose I may have to have a look at the thermostat. I was glancing around the other day and it seems like its easily accessible (from upper rad hose to intake), do I have that straight?
Thanks all!
Jayman is offline   Reply With Quote
Old 01-15-2007, 09:55 PM   #5
Mark Fahey
Guest
 
Posts: n/a
Default

Be sure the fan isn't running when it isn't supposed to be.
  Reply With Quote
Old 01-15-2007, 10:20 PM   #6
Senior Member
True Car Nut
 
Join Date: Jun 2003
Location: Purgatory
Posts: 6,313
Thanks: 0
Thanked 0 Times in 0 Posts
PontiacDad is on a distinguished road
Default

Have a look at the cabin filter, it maybe restricting air flow?
You should have a 195* stat for the winter, -20* your heater should keep up.
In -40*c block half the rad with card board to restrict air flow.
PontiacDad is offline   Reply With Quote
Old 01-15-2007, 10:47 PM   #7
Senior Member
Posts like a Northstar
 
Join Date: Dec 2002
Location: Bellbrook, Ohio
Posts: 547
Thanks: 0
Thanked 0 Times in 0 Posts
compyelc4 is on a distinguished road
Default

My money'* on either a cold thermostat or thermostat that is stuck open. Tell us, does your overdrive engage at all, or is late engaging?
compyelc4 is offline   Reply With Quote
Old 01-15-2007, 10:47 PM   #8
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Aug 2003
Location: Edmonton, Alberta, Canada
Posts: 52
Thanks: 0
Thanked 0 Times in 0 Posts
Jayman is on a distinguished road
Default

Quote:
Originally Posted by Mark Fahey
Be sure the fan isn't running when it isn't supposed to be.
My system is always set on auto. It runs when its good and ready (warmed up). Other than that it is pretty much always on.

Pontiac Dad, I have tried to look at that filter to change it, and honestly couldn't figure out how to release it. I will replace it anyway (once I figure out how to get it out). You know, I never thought of it at all. This is the first car I've had with a filter in it.
Yes I realize it should be a 195* I'm just trying to eliminate everything else first before I look there.
Jayman is offline   Reply With Quote
Old 01-15-2007, 10:51 PM   #9
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Aug 2003
Location: Edmonton, Alberta, Canada
Posts: 52
Thanks: 0
Thanked 0 Times in 0 Posts
Jayman is on a distinguished road
Default

Quote:
Originally Posted by compyelc4
My money'* on either a cold thermostat or thermostat that is stuck open. Tell us, does your overdrive engage at all, or is late engaging?
The overdrive works? Is it responsive to engine temps?
Teach me more, I'm curious now.
Jayman is offline   Reply With Quote
Old 01-15-2007, 11:25 PM   #10
Senior Member
Posts like a Northstar
 
Join Date: Sep 2005
Location: Dayton, OH
Posts: 600
Thanks: 0
Thanked 0 Times in 0 Posts
imidazol is on a distinguished road
Default

My cursory check would be after the car'* motor has run long enough to "warm" up, the upper radiator hose should have water coming through it back to the radiator that'* so warm you can't grip it for more than a couple of seconds-hot. Same for the heater hoses. And if the one hose is lots cooler than other heater hose when the blower is moving air through it on high taking heat out, you might have a partically block heater core.

Most GM cars I've had have the engine temp with needle in middle of range when normally warmed up. You need to verify yours is running at 195. This is a time when the cheap little infrared temperature readers from Harbor Freight would be a good help to measure temps...
imidazol is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Heater output is strange bbrandt11 Bonneville GXP/ Northstar Powered Cars 4 01-30-2014 08:35 PM
2002 Bonneville: Slight over-temp and low heater output Joe Papworth 2000-2005 3 12-27-2013 02:49 PM
Its great that everyone is so nice here crunkfrunk Lounge 12 02-24-2010 11:03 PM
not good. NOT GOOD. (hit and run, not bad-BAD, but not good) repinS General GM Chat 13 11-26-2004 11:35 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 07:31 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.