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Heater blows cold air on left side hot air on.

Tiny
WALKERJAY
  • MEMBER
  • 2003 MITSUBISHI ECLIPSE
  • 99,160 MILES
Heater blows cold air on left side hot air on right how do I repair
Monday, November 19th, 2012 AT 10:18 PM

8 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Sounds like you have a blend door that may not be working properly

Read the guides below on heater system not working and blend door actuator replacement. They will help you figure this out

https://www.2carpros.com/articles/car-heater-not-working

https://www.2carpros.com/articles/replace-blend-door-motor
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Tuesday, November 20th, 2012 AT 4:05 PM
Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,540 POSTS
  • 2002 MITSUBISHI ECLIPSE
  • 98,000 MILES
I own a 2002 mitsubishi eclipse spyder. The heat only gets hot when car is moving. When you come to a traffic light it turns luke warm. Checked antifreeze which was low. Still didnt fix problem. Just started having problem about a week ago. Heat was always really hot before and even when sitting still.
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Friday, October 26th, 2018 AT 7:04 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
If coolant level is low, after toping up, check for air trapped in system. Run vehicle and let it cool donw before rechecking the coolant level in radiator.
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Friday, October 26th, 2018 AT 7:04 PM (Merged)
Tiny
KAMIAJADE
  • MEMBER
  • 1 POST
  • 2006 MITSUBISHI ECLIPSE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 450,000 MILES
When I turn the heat/air on you hear a funny noise like a motor going out. As soon as I turn the air/heat off it stops. No smells
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Friday, October 26th, 2018 AT 7:04 PM (Merged)
Tiny
LEONU4
  • MEMBER
  • 15 POSTS
Thanks for the question. Sounds to me like more than likely the blower motor is going out possibly. Or some leaves are traped in the ( squirrel cage) the blower motor fan wheel. I would recommend running it to a local shop or tracing down the noise yourself if you like working on cars. Please let us know what happens. Thank you!
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Friday, October 26th, 2018 AT 7:04 PM (Merged)
Tiny
MEVASQUEZ
  • MEMBER
  • 1 POST
  • 2002 MITSUBISHI ECLIPSE
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 120,000 MILES
Heater blows cool air. I flushed heater core and it started blowing hot air. Next day it whent back to blowing cool air.
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Friday, October 26th, 2018 AT 7:04 PM (Merged)
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Do both heater hoses get hot? If not, you may still hae a restriction in the core. If so, does it have a heater control valve? If it does be sure it is working, if not it may have a blend door (under the dash) problem.
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Friday, October 26th, 2018 AT 7:04 PM (Merged)
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Do both heater hoses get hot? If not, you may still hae a restriction in the core. If so, does it have a heater control valve? If it does be sure it is working, if not it may have a blend door (under the dash) problem. Also be sure the system is full of coolant
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Friday, October 26th, 2018 AT 7:04 PM (Merged)

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