Question about 2003 Mitsubishi Galant
The part you need is a dealer stocking part. There is an electric motor that turns heater core on and off. It's located under the dash to the left of the glove box. Some disassembly required. The part will cost about $120 to $180. part number is #MR958603. I saved money by purchasing it on line. It is a stocking part at most Mitsubishi dealers. Once you pull the glove box out and remove the bottom half of the dash all the way across, you should be able to gain access to the motor to replace it. Caution: if you do not put everything back in correctly and tie/tape it all back down carefully in the correct places you will have lots of under the dash noises when you are done.
Posted on Nov 14, 2010
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Posted on Jan 02, 2017
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Nov 01, 2013 | 2001 Chrysler 300M
Oct 15, 2013 | Cars & Trucks
Temperature Control Blend Door Failure No Heat or no AC (dependes on
where door sticks)
all modern cars there is a tiny DC electric motor driven gear drive
that moves a plastic door that blends heated and cooled air from the
AC and the heater core, this is called (interestedly enough) the air
temperature control blend door actuator. The motor that moves this
door fails because the door starts sticking from warping, most common
complaint is no heat but it can be no AC as well. To replace these
parts (blend door and blend door actuator) you must remove the entire
dash from the car. Always have this problem confirmed by a dealer or
qualified repair shop as it is a very expensive repair.
Other causes of no heat in the cabin are engine thermostats that are stuck open (engine runs cold) or air bubbles in the cooling system.
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