Question about 1998 Pontiac Grand Prix

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I have a 98 grand prix with auto air and dual climate control. I can not change the air flow through the vents. I have located the vacuum solenoid manifold under the dash that appears to control the flow of vacuum. I ran a test light to each lead that shows power for different air flow modes. How do i test that part? am i looking in the right direction or should i be looking somewhere else for the problem

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  • Pontiac Master
  • 77,499 Answers

What is the vacuum reading from the engine in inches of vacuum?

Posted on Nov 09, 2017

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6 Suggested Answers

6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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shaggyrat
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SOURCE: No Air Output At Dash Vents

linkage inside dash or relay for electric front vents went bad
linkage sometimes comes off its holder from usage this is normal there only held in by a upin under the dash
if electric the relay for the the top vents needs replacing this i believe will be with rest of the relays in engine compartment

Posted on May 31, 2008

emissionwiz
  • 77499 Answers

SOURCE: i need to locate the map sensor on my 98 grand

Your engine doesn't use a MAP sensor (Manifold absolute pressure), it uses a MAF sensor (Mass Airflow), they both provide the same information about engine load but in a diff way. here is a picture of your sensor.
9a5375f.jpg

Posted on Mar 17, 2009

  • 17 Answers

SOURCE: celcius to farenheit

If you take the control assembly out of the dash and look behind it, the connector has a black wire in position D7 (little letters and numbers are printed on the connector). This wire will have a connector on it, pull this connector apart and your display will now be in *F

Posted on Apr 12, 2009

mechanicm639
  • 253 Answers

SOURCE: 2006 Pontiac Grand Prix Dual-Climate Control Light Issues

The lighting in the A/C control head is not serviced. If you want it repaired you will have to but a control head. Good Luck

Posted on May 26, 2009

  • 508 Answers

SOURCE: no air flow from middle level vents

no actuator is electric motor maybe bad or switch control or jammed door!!! :)

Posted on Jul 02, 2009

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98 grand prix sse. The climate control system doesnt blow cold through the vents? The blower is working ok an the ac system is charged an blows cold out the defrost vents nut not the normal vents or the...


OK, sounds like the vacuum motor system is either disconnected behind the dash, or the vacuum control for the door inside the dash is broken, somehow.

need to take dash and climate controls off to see which it is.

Good luck.

Jul 10, 2010 | 1998 Pontiac Grand Prix

1 Answer

I have one problem with the air acondition is the next. The air flow that come out for the 3 louvered vents is hot, in the other two the air is cool My car is a GRAN PRIX 98 GTP Can you help...


Check for a vacuum under the hood,or a vacuum canister (reservoir for the vacuum)to see if it has a hole or crack in it,or the vacuum line has came off.

Jun 10, 2010 | 1998 Pontiac Grand Prix

1 Answer

I have a 1997 Pontiac Gran Prix and the air conditioner is full blast on the passenger side and on the drivers side is hot air?


I think these cars have dual climate control. Basically, the driver and passenger can set their own climate. Some like it hotter than others, is the thinking. If this is the case, you need a new climate control module. If not, I am at a complete loss.

Good luck!

May 21, 2010 | 1997 Pontiac Grand Prix

1 Answer

Air from the a/c is coming from front mirror vents


The vacuum switch is right behind the mode control knob on the climate control panel, but make sure it is getting vacuum from the engine before replacing it. There is a vacuum line that goes from the engine intake manifold through the firewall to the control panel. This line may have come loose from the engine, which is the most likely cause of your problem.

Dec 09, 2017 | 2000 Pontiac Grand Prix

2 Answers

My heater on my 2002 pontiac grand prix blows hot then cold air my wife hit a huge pothole on sunday then after that this started doing this please help


check you climate control vacuum hose. it may have come loose or crimped. its located beneath and under battery mount box. also check to see if your coolant resvouir is full as well as your resivour cap is tight.

Jan 26, 2010 | 2002 Pontiac Grand Prix

1 Answer

Heater/ac door actuator isnt workin right. air coming out of bottom and top vent but not from the face vents. keep switchin control to switch vents. only goes to bottom and to the windshield vents.


Sounds like either the computer that controls the auto climate control has gone out or you could have a vacuum leak. I would definitely check the vacuum leak first. I took my 98 Lesabre to a repair shop several years ago for the same problem. When I picked it up they told me my computer was out and it would cost around $600 to fix. As an alternative, they had unhooked and rerouoted vacuum lines, breaking a tube off the controls under the right side of the dash. They told me that they would have to remove my glove box each spring and fall and reconnect the vacuum lines to change the airflow from floor to dash and vise versa. My fix was to run the lines under the dash just beneath the ash tray and connect shut off valves to the vacuum lines. Now when I need to use the AC I can change the flow of the vacuum by simply turning these two valves so that the flow changes from floor to dash or back. I know this is pretty jack leg but the damage had been done and this has actually worked pretty good.

Aug 16, 2009 | 1997 Buick LeSabre

1 Answer

2003 Pontiac Grand Prix - A/C not cool on driver's side


You would need to buy a factory service manual for that blend door diagram. Try eBay for a used manual set.

Aug 22, 2017 | 2003 Pontiac Grand Prix

1 Answer

2006 Pontiac Grand Prix Dual-Climate Control Light Issues


The lighting in the A/C control head is not serviced. If you want it repaired you will have to but a control head. Good Luck

May 26, 2009 | 2006 Pontiac Grand Prix

1 Answer

Auto. Climate Control


start by inspecting your monovalve(located behind battery in engine compartment. The diaphragm is probably torn- you need to remove the 4 retaining screw off the lid and pull out the solenoid. on is the diaphragm. when it is torn hot water enters your heater core all the time

May 18, 2009 | 1995 Mercedes-Benz E-Class

1 Answer

Celcius to farenheit


If you take the control assembly out of the dash and look behind it, the connector has a black wire in position D7 (little letters and numbers are printed on the connector). This wire will have a connector on it, pull this connector apart and your display will now be in *F

Jun 20, 2008 | 1997 Pontiac Grand Prix

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