Question about 2000 Mazda MPV
No heat from the heater system. AC works fine to cool the car. Temperature control does affect air flow when the temperature is changed so it does seem to be reading the air temp in the vehicle. The temp gauge shows at about 50% on the dash. Just no heat!
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Posted on Jan 02, 2017
SOURCE: Heater problem 1999 Mazda 626
under the dash board on the passenger side is where the heater core is located anything associated with the blend doorwould also be located there as well.
Posted on Feb 12, 2012
SOURCE: 2003 Mazda MPV heater blows heat, then blows normal temp air, then heats and so on. Trying to find what is the problem. The unit is blowing air all the time but the temperature changes within seconds.
PROBABLY THE CLIMATE CONTROL DOOR ACTUATOR DOES NOT WORK.
Posted on Nov 09, 2013
Testimonial: "Tried that but it wasn't the problem."
Tips for a great answer:
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Dec 19, 2012 | 2000 Mazda MPV
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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