» » »

Nissan Q&A

Ask Your Question

2003 Nissan Altima Question: Heater blowing cold air! Changed termostates. No help

 

Question

mikeyb4, 2.5L 4 Cylinder, Menifee, CA, January 09, 2013, 15:34
Profile_thumbnail
 Rookie

Seen online if got air in system it would cause this.

1 Answer
Flag This
  • Answer #1

    gmc4me January 09, 2013, 18:36
    Profile_thumbnail
     Journeyman

    If there is air in the system the waterpump will not pump the coolant throughout. You may have air in the system and need to bleed it out, could be a bad temp./blend door actuator which moves a plastic flap inside HVAC box when you adjust the temp. at the controls, could possibly be a clogged heater core, or your new thermostate could be bad. Especially if it's aftermarket. I've seen a couple new aftermarket thermostats go bad in a week or so after installing them.

    Flag This
  • Reply

    mikeyb4, January 09, 2013, 18:44
    Profile_thumbnail
     Rookie

    THANKS

    Reply
    Flag This