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Blower works but doesn't blow hot only cold air

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  • 231 Answers

Sounds like heater core may need replacing.

Posted on Dec 05, 2016

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Posted on Jan 02, 2017

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SOURCE: air/heater not blowing air at all

Starting with the basics, check the fuse for the blower motor. If it's blown and you replace it and all is fine then you can write it off as a fluke. If it blows right away or soon after you've got a short or something somewhere. If the fuse is ok then the problem is most likely the blower motor resistor or the blower itself. There is a chance it could be a module, wiring, etc aso...
Good luck

Posted on Sep 16, 2008

  • 7 Answers

SOURCE: i have a 2000 dodge caravan, no heat

Sounds like the air "blend" door might be inoperable. This door opens and closes a specified amount to regulate the amount of either cooled or heated air, as requested by the climate control unit. If the door is continually in the position which is bypassing the heater core (cold setting), the air will not get warm regardless of the condition/operation of the heater core. I'd suggest having this component checked.

Posted on Nov 28, 2008

emissionwiz
  • 76673 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"

dmftrucker
  • 1922 Answers

SOURCE: Heater wont blow hot air in my 1998 Lincoln Navigator

the computer that controls the deflector motor are not responding and opening the door for heat, I'm sure you have climate control,check the temp setting sensor to the computer input first

Posted on Nov 01, 2009

ginko
  • 19396 Answers

SOURCE: 2003 mercury grand marquis LS

The blend door is stuck in cold position. That usually happens because the blend door actuator has failed.

You will need to test and replace the blend door actuator.

To replace the actuator you will need to take apart the dash and remove completely the instrument panel,d isconnect the connector, remove the four screws, remove the temperature blend door actuator and replace it.

The replacement is not a job for beginners, since you have to take apart the dash to access the actuator.

Regards.


Posted on Nov 18, 2009

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To troubleshoot this types of problem,click the link below :---
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This will help.Thanks.

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1 Answer

My AC doesn't work, hot or cold no air comes out. Everything turns on as if it was working, but no air comes out.


Could be your fuses, blower motor, or blower motor resistor. Jags are fickle cars and are best dealt with by experienced mechanics that specialize in European vehicles.

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I have a 2000 pontiac grand prix with a digital climate control system. The heat quit working, it doesn't blow out any heat. Now that it is warm outside the air stopped blowing out any air. The digital...


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My is heat is not work?My car is blowing cold air instead of hot air, I have a brand new heater core,the thermostat is not sticking,I got anti-freeze in it,It's getting cold in I need heat.Please help me


first feel the heater core hoses see if both are hot if so then your problem is in the blend air door must be stuck on cold. is your blower motor blowing cold air if not your blower motor might be the problem. the blend air door is down by the blower motor.

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1 Answer

Blower on heat/a not working


So it works with a/c but doesn/t work with heat. Is that what your saying?
Or it blows cold air on heat selection?

If it blows but only blows cold air on heat selection
check out the following items:
temperature selector switch
blend door actuator and motor.



Here are a list of items to check out or have a shop inspect if it doesn't blow anything at all.
a) on/off switch
b) relay
c wiring
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2 Answers

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.

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