How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask CarQuestionGuy Your Own Question
CarQuestionGuy
CarQuestionGuy, Technician
Category: Car
Satisfied Customers: 1259
Experience:  ASE Master Auto Technician for 5 years, ASE Refrigerant Handler, ASA, iATN
8613158
Type Your Car Question Here...
CarQuestionGuy is online now
A new question is answered every 9 seconds

2004 Pontiac Grand Prix: coolant level is..car warms..blowing cold air

Customer Question

2004 Pontiac Grand Prix,coolant level is fine, car warms up, but heater is blowing cold air
Submitted: 8 years ago.
Category: Car
Expert:  CarQuestionGuy replied 8 years ago.
Thanks for using Just Answer

Do you know where your heater hoses are on your engine? If so, are they getting hot?

Have you checked the coolant in the radiator and the reservior both?

Let me know.
Customer: replied 8 years ago.
Heater hoses are getting hot and the coolant level in the rad and tank are ok
Expert:  CarQuestionGuy replied 8 years ago.
OK, this narrows down the possiblities. The most common causes of your problem are:
1) Blend doors not working. This could be because of a vacuum hose problem, linkage problem or even a heater switch control problem.
2) Heater control electrical problem. This is the most common problem with symptoms like these. If the heater controls are not working right they might not be sending the signal to open the blend doors to let the heat get blown into the car.

You might have already done it but you should look under your dash to see if you can see any linkage that is disconnected. You should also try moving the temperature controls to see if you can hear anything moving under your dash.

Let me know if you need anything else.

Related Car Questions