☰
Login
Join
×
Ask a Question
Questions by Vehicle
Repair Topics
Testing / Diagnostics
Repair & Service Guides
Symptoms
Warning Lights
Trouble Codes
How It Works
Videos
Login
Become a Member
Home
Pontiac
Montana
Climate Control
Air Conditioner
Not Working
my heat blows cold unless i have defrost on then it blows warm
2001 PONTIAC MONTANA
150,000 MILES
JBASEY
MEMBER
5 POSTS
when i turn on my heat it comes out cold but when i turn on defrost it blows warm
Nov 7, 2011 at 2:46 PM
Advertisement
RIVERMIKERAT
✓
Experienced Mechanic
6,106 POSTS
Check the vacuum and electrical lines to the air doors. One is most likely loose or missing.
Nov 7, 2011 at 2:49 PM
JBASEY
MEMBER
5 POSTS
where are the vacuum air doors
Nov 7, 2011 at 2:52 PM
JBASEY
MEMBER
5 POSTS
thankyou for the response where are the electrical lines and vacuum air doors located
Nov 7, 2011 at 3:16 PM
RIVERMIKERAT
✓
Experienced Mechanic
6,106 POSTS
The AC/heater blower assembly is located under the dashboard, and behind the glovebox. Take a look at the pictures.
Images (Click to enlarge)
Nov 7, 2011 at 3:19 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Add image or video
Ask a new question
Frequently Asked Problems for This Vehicle
Engine won't start
→
Engine overheating
→