Question about 1996 Pontiac Sunfire

3 Answers

1996 sunfire heater problem

Ahhh it's winter and I'm having a heater problem!!! The heater has been losing intensity over the last week or two, and just stopped all together now! I ahve checked the fuses, no concerns there. None of the settings are giving out anything, and I can hear the hissing sound still when I switch between the settings. Any suggestions for this somewhat handy single mom!!! Thanks a million

Posted by on


3 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

I had this same problem 3 weeks ago.... i know someone who works for GM and this is a common problem with these cars. under your glove compartment where yout passanger feet will stretch to there is a dash plate, when you remove that look for a plug sticking down with 4 or 5 wires in it. Unplug the connector and there are two 5.5 mm (I think) screws. Not positive on the size. The one towards the front of firewall is tough to get, but that is your blowermoter resister, replace that an you should be fine...1996 sunfire heater problem - 1777bd0.gif

Posted on Feb 18, 2009

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Mine is doing the same, but for a different reason. if the first solution dosnt work, you may have to flush your system and replace the coolent. the prev owner of my car accidentaly put a different typ of coolent in with the coolent that was already in her. he mixed the green anti freeze with a red anti freeze... the two arnt the same and now my heat takes for ever on a cold start.
so if the problem keeps up try flushing the coolent, and rplacing it... if you dont know how then the garag should do it for like 50 $

Posted on Feb 17, 2009

  • Level 1:

    An expert who has achieved level 1.


    An expert who has answered 20 questions.


    An expert that hasĀ over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 20 Answers

Thermostat stuck open .the water cant heat up to full temp. may need to replace . easy way to check is to take the radiator cap off when its cold then with the car running wacth the flow it will be **** untill the water temp get hot in the motor then it should start flowing untill the cooler water will cause it to close again. and so forth it'll keep repeating this . but if the water flow is going as soon as u start the car then replace the stat.

Posted on Jan 21, 2009

1 Suggested Answer

  • 2 Answers

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

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

My friends have a 1997 Pontiac Sunfire that is constantly overheating.

Are the fan/s coming on when reaching operating temperature ?

Nov 24, 2015 | 1997 Pontiac Sunfire

1 Answer

My 1997 Pontiac Sunfire has a gasoline odour through the vents the last few weeks. What could the possible cause(s) be, and what might the repair bill be?

have the fuel system checked for leaks and have the EVAP system checked for proper operation. as far as repair costs depends on what is causing your problem.

Sep 18, 2014 | 1997 Pontiac Sunfire

1 Answer

Increase then decrease idle when engine is cold especially

cold engine idle surge. (problem)
RPM range of surge not stated
300-700 or 800 to 1500? (range is critical to diagnosis)

bad fuel
running summer fuel in winter (running old fuel?)
needs a tune up bad, see the list in the operator guide.
idle speed controller,sticking or EGR valve same. (clean them)
location not stated, so cant guess about local air temps.?
no other symptoms, lack of engine power? etc?
was it ok last week, or better, when was the last time it was OK?
1week, 1year?
surge , causes, on a tuned engine might be:
1: too lean. so lean the ISC can not control idle. rpm low, stalling
2: too rich, flooding, stalling, spark plugs foul (look at them)
3: weak compression in 1 or more cylinders.
4: bad spark.
5: air leaks, in the plenum causing , ISC to lose control.
why high RPM?

well that means it fails hot too.
and there is a simple tests. for hot surge.
is engine fully hot? 180F and holds solid there?
say rpm is about 800
and you turn on head lights, heater fan and (not AC) and defrost.
the RPM must hold or the ISC is failing.
ISC -= idle speed controls. (all EFI has this function)

Oct 28, 2013 | 1996 Honda Prelude

1 Answer

I'm still having problems with my heater not blowing in my 2000 Saturn LW2 (L300). I've taken it to an elecrical specialist 4 times now and they can't seem to find what's wrong. The blower motor resistor...

Did you try to change the blower motor if you havent done that i would do that but according to me its sounds like a blower motor blow out good luck

Jan 04, 2011 | 2000 Saturn LW

1 Answer

Where is the blower motor located for the heater on a 1996 pontiac sunfire

it is under the dash on passenger side possibly need to remove a shield to see it if it is only working on high replace blower resistor

Dec 15, 2010 | 1996 Pontiac Sunfire

1 Answer

Last winter had every thing flushed and thermo put in. the heat would melt your face. then about a week ago started running cool about 150 n weak heat,changed thermo 195. now it gets up to about 190 but...

It should be at 150 or so explain this p[roblem better i have the same vehicle and 4 factory manauls for it get back if you realy want the answer

Dec 11, 2010 | 1996 Chevrolet Blazer

1 Answer

Water from radiator is coming out of a vent it looks like ander where heater core hoses go into firewall under hood. I keep adding water but it gone after a few minutes

ur heater core may be going, i saggest changing it before u got water more then coming out of the vents, or the clamps on the heater core maybe lose tighten them c what happens

Sep 13, 2010 | 1996 Pontiac Sunfire

1 Answer

I recently purchased a 1996 Pontiac Sunfire (about 6 weeks ago) and have had to put coolant into it twice now. Within 2-3 weeks it is completely empty and the temp gauge gets hot and today the "check...

Have it checked by a mechanic it may be a bad head gasket OR a leak you are not aware of.

You may see white smoke out of the tail pipe that smells sweet, this means bad head gasket.

expensive to fix.

Apr 03, 2010 | 1996 Pontiac Sunfire

1 Answer

How much of the dash do I need to remove from a 1999 Sunfire to replace the heater core?

Almost all of the passenger front lower dash and the evaporator box needs to be disassembled to gain acces to the heater core.Yes this is a very labor intensive job.It will take about six hours labor to accomplish this.

Dec 22, 2009 | 1999 Pontiac Sunfire

Not finding what you are looking for?
1996 Pontiac Sunfire Logo

133 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts


Level 3 Expert

77544 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8826 Answers

Are you a Pontiac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides