Question about 2002 Mitsubishi Galant

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Heater core and a/c

Disconnected heater core but a/c is blowing hot air

Posted by Chandra olazaba on

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1 Answer

jamessizer

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  • Mitsubishi Master
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I, feel sorry for you, after reading your problem, but don't worry you visit the Reliable-Store they will help you for sure.
Best Manuals

Posted on Sep 26, 2016

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5 Related Answers

Anonymous

  • 1 Answer

SOURCE: 2003 Mitsubishi Eclipse GS blows cold air in heat mode.

ok here we go and you aren't going to believe it...
I replaced the thermostat step one

I noticed that I had a small leak at the engine side of upper hose fixed that by taking it off and cleaning it and putting the hose back on Step two

then while refilling the reservoir with coolant i found that the hose that was supposed to be in the fluid was curled up on top and not sticking down in the fluid where it should be.
played with the hose until i got it to fall down in the reservoir where it should be Step 3

I started the car with the radiator cap off and let it run until it got to normal operating temp. and keep filling the radiator with fluid until the level stayed constant. Then put the cap back on and test drove. Everything worked fine haven't had that much heat in awhile and it kept blowing hot even when i stopped and let it idle for ten min.during test drive. Checked reservoir when I got home and had to add a small amount of coolant but not much.

I really think that the hose in the reservoir not being in the right place and pulling air into the system instead of coolant is the real culprit of this drama, but i replaced the thermostat to be safe.

Posted on Feb 21, 2009

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jstrebe

  • 4 Answers

SOURCE: heater blows cold air

I had the same problem with the heater only working when accellerating. Found the overflow tank pick up tube was kinked. This of course made my coolant level low. So when the cars hot the coolant would push into the overflow, but when the car cooled the kink would prevent it from flowing back to the radiator.

Posted on Sep 04, 2011

Anonymous

  • 1 Answer

SOURCE: Heater not dispersing hot air

There ia an actuator that controls the flap to change from hot to cold. You have to pull the bottom part of the dash and the whole blower motor housing. The part you are looking for is located just behind the radio and has an arm that goes into the heater core line. That is the piece you need. Its around $165 dollars and a dealer only part. And hope you have someone that can do it because mitsubishi charges over $500 in labor.

Posted on Sep 19, 2008

Anonymous

  • 1 Answer

SOURCE: Mitsubishi Eclipse Ac and heater problem

cold air on passenger side of car and warm on drivers, why

Posted on Oct 14, 2009

pops296

Mike Tillman

  • 174 Answers

SOURCE: heater not blowing hot air

Sounds like the heater blend door. The actuator may be stuck or broken. The actuator opens and closes to adjust for the heat setting in the car. You might be able to take a coathanger and manually open the door if you can get to the control arm. They are usually hard to get to and pretty expensive. It is located under the dash at the heater core box. Good luck.

Posted on Dec 16, 2010

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1 Answer

I have a 1997 dodge ram 1500 the heater does not blow hot air but the inlet hose to the heater core is hot on the inlet and outlet side thermostat heats up to 200 degrees


If both heater hoses are warm/hot,look under the dash at the heater core area and look for a air blender door lever.it may be disconnected .Or try to open it manually which should allow the air flowing through the hot heater core to enter the vehicle.

If only one hose is hot the heater core may be plugged internally.disconnect the heater hoses and back flush the heater back and forth with a garden hose until you get a unrestricted flow of water.

When disconnecting any heater hoses just clamp them off so you do not have to drain the complete system while working on "just" the heater.

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1 Answer

Why is my heater blowing cold


Most likely it is the heater control valve that shifts air from blowing across your heater core to your air conditioner core.

If your fan works and your car is fairly new..meaning your heater core isn't dirty and full of craap...then it is the climate cotrol valve.
If you are lucky, it might be a thermostat that is bad and blocking hot water from entering your heater core. Bottom line, if hot water doesn't circulate thru that little heater core, you won't get heat.
You might be able to look under the hood and grab the hot water lines that go thru the firewall and feed your heater core. If they feel cold to the touch after engine has warmed up, then you aren't getting circulating water to the heater core. If they feel nice and warm, then the heater core is fine, but your climate control valve has closed off the fan that blows across the core to disperse heat into the cabin

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What have you checked so far ?
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replace the core!

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1 Answer

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If the heat blows hot, the defrost should also. If the heat does not blow hot air, it could be your thermostat, your heater core valve, or the heater core itself. with the vehicle being a 2002, the heater core is the least likely.

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Yes clogged heater core may be the answer in your case .


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I have changed the theromast twice and flushed the coolant system.The heater core is not leaking.. the blower is still blowing cool air.


The heater in your car depends upon a flow of hot coolant going through the heater core in order to get hot air into the car. If the heater core is partially plugged, it will restrict the flow. If you have a head gasket that is putting exhaust into the cooling system, it will eventually get into the heater core. When this happens there is no coolant in the heater core to make the air warm. If the water pump vanes have corroded away the result will be very poor coolant circulation causing the heater to not blow hot air. If your car is equipped with a heater control valve that is not functioning properly, the coolant flow will be restricted. One or a combination of these factors is likely the culprit in your case.

if the car is not overheating, the thermostat is working fine.... replace or flush the heater core multiple times to try and eliminate sediment build-up.

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