No heat

Tiny
ROYLAFRENTZ
  • MEMBER
  • 1997 PONTIAC GRAND AM
I have no heat in my 97 grand am se 3.1. I've replaced the thermostat and heater core and tried to bleed the system. What do I do
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Monday, October 15th, 2012 AT 3:19 PM

12 Replies

Tiny
KHLOW2008
  • EXPERT
Ensure the coolant level is correct. If the hoses in and out of heater core are hot, check the air/mix. It could be stuck or the actuator is not moving between heat and A/C.
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Monday, October 15th, 2012 AT 3:29 PM
Tiny
ROYLAFRENTZ
  • MEMBER
I had heat until I replaced the heater core and thermostat. It stopped when I got it back together. I made sure everything was hooked back up the same as it was before I took it off. The selector works but it is slow in switching.
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Monday, October 15th, 2012 AT 3:46 PM
Tiny
KHLOW2008
  • EXPERT
When you move the heat control lever from full cold to full heat, do you hear a door slam noise?

Recheck the installation of the temperature valve door. The cable seems to be out of adjustment resulting in the door not closing fully.

ADJUSTMENTS

TEMPERATURE CONTROL CABLE

1. Temperature control cable has a self-adjusting clip located on A/C-heater module end. To adjust cable, quickly turn temperature control knob back and forth from full cool to full warm position. If clip requires adjustment, added effort will be necessary to move temperature control knob through final part of travel.

2. When adjustment is complete, temperature valve will be heard hitting stops at both extremes of travel. If valve is not heard hitting stops, remove cable end eyelet from actuator and turn eyelet until threads on cable end are flush with inner end of eyelet housing.

Here is the location of the temperature actuator I would double check that first.

Check out the diagrams (Below)

Please let us know what you find.

Cheers
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Monday, October 15th, 2012 AT 4:13 PM
Tiny
ROYLAFRENTZ
  • MEMBER
No I do not. There is no noise at all until I hear a hissing sounds and sure enough he vacuum line had fallen off so I reconnecting it and it all works. Thanks 2Carpros
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Tuesday, October 16th, 2012 AT 2:34 AM
Tiny
KHLOW2008
  • EXPERT
Use 2CarPros anytime, we are here to help. Please tell a friend.
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Tuesday, October 16th, 2012 AT 7:51 AM
Tiny
DEWEY88
  • MEMBER
  • 1997 PONTIAC GRAND AM
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 185,000 MILES
Heater problem
1997 Pontiac Grand Am 4 cyl Two Wheel Drive Automatic 185000 miles

after replacing the heater core, I dont have any heat, and before the replacement the heater was extremely strong, and would blow you out of the car. Now its as if the blower doesnt hardly work, I dont get any heat, and im still smelling antifreeze after I turn it off from driving.
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Tuesday, January 2nd, 2018 AT 7:41 PM (Merged)
Tiny
WRENCHTECH
  • EXPERT
With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both hot to the touch. If they are..........

Here is a guide that can help

https://www.2carpros.com/articles/car-heater-not-working

The temperature is controlled by the use of an air mix door that is operated by an electric motor/actuator. This door can be jammed or the actuator can be inoperative or have stripped plastic gears internally.
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Tuesday, January 2nd, 2018 AT 7:41 PM (Merged)
Tiny
TIMOTHY_HAHN2002
  • MEMBER
  • 1996 PONTIAC GRAND AM
There is no heat but the fan works fine.

1996 Pontiac Gran Am SE V6

Posted at Tue Oct 23, 2007 8:50 am
By timothy_hahn2002, New to the forum
Give Feedback | Votes: 0

My heater is not working but the fan is working perfect. Would it be the heater hose? And if so where would it be located in my car?
_________________
Tim Hahn

Find a manual for your Grand AM Repair Question.

Posted at Tue Oct 23, 2007 1:56 pm
By rasmataz, Certified 2CarPros Master Technician
(375) Give Feedback | Votes: 45

You've been answered, go back to your 1st post and stay there if the problem continues.
_________________
2Car's Certified PAST Foreign/Domestic, Donations and Feedbacks are very welcome and appreciated for the help we've rendered for you.
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Tuesday, January 2nd, 2018 AT 7:41 PM (Merged)
Tiny
JACK42
  • MEMBER
Low on coolant? Do th eheater hoses get hot when engine warms up? If all good then sounds like a blend door problem under the dash
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Tuesday, January 2nd, 2018 AT 7:41 PM (Merged)
Tiny
DEJ2073
  • MEMBER
  • 1994 PONTIAC GRAND AM
Heater problem
1994 Pontiac Grand Am 6 cyl Front Wheel Drive Automatic 120k miles

replaced the heater core and found that air flows through but not warm air
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Tuesday, January 2nd, 2018 AT 7:41 PM (Merged)
Tiny
JDL
  • EXPERT
With the engine warmed up and running and the heater turned on, are the heater hoses hot?
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Tuesday, January 2nd, 2018 AT 7:41 PM (Merged)
Tiny
BLUEMYSTC5
  • MEMBER
I would check your themostat
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Tuesday, January 2nd, 2018 AT 7:41 PM (Merged)

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