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My heater is only warm at 50mph or more.

Tiny
ANONYMOUS
  • MEMBER
  • 2003 MAZDA TRIBUTE
  • 180,000 MILES
My heater is only warm at 50mph or more otherwise it blow cold air. The gauge show normal operating temperature. When it's under 50mph or idling nothing but cold air comes through the vents. Why? How can I repair it?
Sunday, November 4th, 2012 AT 3:12 AM

2 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
The heater core may be clogged
Roy
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Sunday, November 4th, 2012 AT 3:15 AM
Tiny
PYASGER2
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  • 1 POST
Thermostat should be checked
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Sunday, November 4th, 2012 AT 3:24 AM

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