Mazda Millenia heat help

Tiny
MICHAELHELMS
  • MEMBER
  • 1998 MAZDA MILLENIA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 130,000 MILES
1998 mazda millenia s problem: heater/defroster works great when car is moving (good heat temp) but when its sitting and idleing, it starts blowing cold or colder air. Help
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Sunday, December 5th, 2010 AT 2:46 PM

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Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
That's probably a partially restricted heater core. You can try running some flush chemical through it and then disconnecting the heater hoses and flushing the core with garden hose pressure but that may not work and you ultimately may have to replace the core.
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Sunday, December 5th, 2010 AT 2:56 PM

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