Heater

Tiny
HERNANDEZ88
  • MEMBER
  • 1993 NISSAN MAXIMA
  • 6 CYL
  • FWD
  • MANUAL
I have a 1993 nissan maxima and my heater blows cold air?
Saturday, January 22nd, 2011 AT 5:04 PM

1 Reply

Tiny
ERNEST CLARK
  • MECHANIC
  • 1,730 POSTS
Check that both hoses leaving the heater core at the firewall are hot when engine is at operating temp.

If no: Possible blockage in heater core or faulty heater shut off valve.

If yes: Possible faulty control unit on dash, stuck blend door in HVAC unit or leaking vacuum line/solenoid.
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Tuesday, February 8th, 2011 AT 11:05 PM

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