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Blower blowing cold air only, what might be the problem?

My 2001 Chevy Blazer is not blowing hot air just cold.

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  • Kevin Rowland Feb 21, 2012

    This is actually a 2000 Chevy Blazer not a 2001. Sorry for the mistake!

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

ndguy2481
  • 251 Answers

SOURCE: 2006 chvy impala when idling dont blow hot air

1 Inspect Cooling System Mix Coolant level low or flow is restricted. grey_line.gif 2 Inspect Thermostat Thermostat stuck closed grey_line.gif 3 Inspect Heater Control Valve Leaking or defective heater control valve. here something to help u

Here to help Shaun

Posted on Nov 23, 2008

emissionwiz
  • 75822 Answers

SOURCE: Front Blower

ok, missed the part about the rear ac working, the part that causes this is called the air temperature control blend door actuator motor, it is an electric motor driven gear drive that moves the plastic door inside the air ducking to mix or shut off the hot or cold air from the ac evaporator core or the heater core, you will need to replace it.

Posted on Sep 03, 2009

Testimonial: "Great thanks that could be my problem. Is the motor by the inside coil"

  • 9 Answers

SOURCE: one side air blows cold one side blows hot

GM has a known problem with the electric actuators that operate the blend and temperature doors in the HVAC system. There are 4 or 5 of these in the typical system. Any can start sticking or binding and cause this problem. Sometimes they can be cleaned, or they might need to be replaced. Sometimes resetting the HVAC system controller by disconnecting the battery for 10 minutes, then reconnecting it, will correct the problem.

Posted on Sep 15, 2009

inspectmycar
  • 233 Answers

SOURCE: ac blowing hot air

the blend door actuator located on the air box (right hand side under dash) is prob. inop. worst case senerio the blend door its self is broken. I have replaced the actuator more than anything.

Posted on Sep 16, 2009

  • 1779 Answers

SOURCE: 2001 Dodge Caravan heater blows cold air when stopped

Have you checked the coolant level? What you describe is exactly what happens if the coolant level is low. When stopped at idle, hot coolant is not circulating through the heater core, so no heat. As the engine increases in rpm's when you pull away from the light, the water pump is spinning quicker, and some coolant is making it to the heater core. So check the level, and if it is low, keep an eye on it to see if it drops again. That of course indicates a leak somewhere. Get it fixed, as overheating the engine leads to costly repairs and worse case a new engine. Let me know how you make out with this.

Posted on Dec 05, 2009

Testimonial: "Thanks Curt! You were right ON!"

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