2002 Mitsubishi Galant Heater Blowing Cold Air

GALANT2002OWNER

MEMBER
2002 MITSUBISHI GALANT

Heater problem
2002 Mitsubishi Galant 4 cyl Two Wheel Drive Automatic 124K miles

My Mitsubishi Galant 2002 blows only cold air (The A/C seems to work fine). I checked with the dealer and he stated that the Hot/Cold pump needs to be replaced. If that is the issue (pump not working) even A/C should not work or car engine should get overheated. Am I correct? Based on the articles on this website it makes me feel that the heater valve is not working. Any suggestions?

Should I replace the hot/cold pump first and then check or should I replace the heater valve first?

5 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Hi Galant2002Owner, Welcome to carpros and TY for the donation

You might want to start at checking the thermostat if its stuck open. Heater core not clogged-up, heater control valve and the air blend door if its stuck in the cold position

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Saturday, October 23rd, 2010 AT 9:32 PM

GALANT2002OWNER

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3 POSTS

Any suggestion on how to
- check the thermostat if its stuck open.
- heater control valve and
- the air blend door if its stuck in the cold position

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Monday, October 25th, 2010 AT 3:30 PM

RASMATAZ

MECHANIC
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What pump are they talking about?

If you haven't change the thermostat-do so and then comeback or you can test it by using hot water

The heater control valve is where the heater hoses are attached too-

Air blend door you have to open it up the dash and check its operation

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Monday, October 25th, 2010 AT 5:58 PM

GALANT2002OWNER

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The dealer referred as hot/Cold pump. He was referring to water pump.

I will check suggested steps and get back to you.

I have another problem and wanted to check if these two are inter-related? The second problem is - Even if I blow air through the vents on the windshield, the fog from the middle bottom portion of the windshield doesn't go.

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Thursday, October 28th, 2010 AT 10:13 PM

RASMATAZ

MECHANIC
75,992 POSTS

There's a door/flap that's not opening-you need to open it up also check the air blend door could be stuck on the cold position

If the water pump is defective the engine will overheat-coolant is not circulating and heat is not being removing from the engine