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1992 Mazda MPV heating problem

Tiny
SINGIDUNUM
  • MEMBER
  • 1992 MAZDA MPV
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
92 MPV, 6 cyl, front wheel drive, around 153,000 miles.
Heater is blowing cold (kind of worm) air when selector **** is on HOT position.
If selector is on COLD I have realy cold air coming out.
Both water lines to/from heater in engine compartment are hot when engine runs on normal opereting temperature.
This started few weeks ago; I had heat in the car and than sudenly no more.
If actuator (electric motor ) is suspected, is there any fuse for it?
Or, if blend door is jammed, does whole heating core has to be pooled out of dash?
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Sunday, December 5th, 2010 AT 10:25 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check and test the thermostat and also the air blend door/actuator
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Sunday, December 5th, 2010 AT 10:36 PM
Tiny
SINGIDUNUM
  • MEMBER
  • 4 POSTS
Thanks a lot for your response.
To check blend door does whole heat unit has to be removed from dush?
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Sunday, December 5th, 2010 AT 10:48 PM

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