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 Post subject: 1996 Heater
PostPosted: Fri Jan 22, 2010 9:41 am 
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Joined: Sun Nov 22, 2009 2:09 pm
Posts: 3
Year and Trim: 96 and 98 Bonneville SSEI
I have a 1996 Bonneville that has a heating problem. The heat does work but only
sometimes. The heat will work initially but will go cold occasionally. It will return to heat if the car is turned off and
started again. Unless I replace the entire system, I'm unable to get a mechanic to narrow the problem down. Any
suggestions?


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 Post subject: Re: 1996 Heater
PostPosted: Fri Jan 22, 2010 10:19 am 
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Joined: Mon May 19, 2008 7:01 pm
Posts: 16782
Location: Central Illinois
Year and Trim: 1992 SSE
2009 G8 GT
Is this an airmix actuator problem? I've never had this issue, but it sounds like the issue to me.

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WHITE WHINE - IT'S INTOXICATING. 1992 SSE Supercharged 236.26 ci (.040 Over)
15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Easy Performance Gen 3 Air/Fuel Calibrator, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers and 10" Subs, 1300 watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, McCoy Motorsports Ceramic Coated Ported Exhaust Manifolds, Fan Override, PowerSlot Slotted Rotors.
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim Trailblazer mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser


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 Post subject: Re: 1996 Heater
PostPosted: Fri Jan 22, 2010 10:53 am 
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Posts like a Northstar
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Joined: Thu May 22, 2008 8:52 pm
Posts: 1844
Location: Pacific Northwest
Year and Trim: Black 2001 Bonneville SSEi
yeah, it sounds like a leaking climate control vacuum system. I would think that is the only thing it could be. if hot water is getting to the core then the only thing that would stop warm air from getting to the vents would be a closing air duct door.

I have warmer air flowing out some vents than others. It's tough to get around in there to check things out. taking the dash off is recommended, but that doesn't seem worth the hassle in my case. You can get at the actuators on the passenger side by taking apart the glove box. And you can pull the climate control nob panel to check vac tubing connections there.

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2001 Bonneville SSEi. 1598xx mi.
great car. Wrecked

ImageImage
Burnt Bonny.

Note if you pull the injectors to obserbe fuel delivery...make sure you leave the plugs in and disconnect the ign. Believe me


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 Post subject: Re: 1996 Heater
PostPosted: Fri Jan 22, 2010 11:48 am 
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Retired Gearhead
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Joined: Mon May 19, 2008 12:35 pm
Posts: 3989
Location: Ames, Iowa
Year and Trim: 98 Caravan is the daily driver 215K
Check things in this order: Coolant level in the radiator with the engine cold. Low coolant can starve the heater core of coolant causing intermittent heat. Next, check heater hoses with engine warmed up. Both should be hot, top hose just a little warmer. If the lower (return) hose is a lot cooler that the feed hose, suspect a blocked heater core. If both hoses are hot, and heater is not blowing hot air, then the problem is in the ducts - usually a bad airmix door actuator. Air not blowing where it should suggests vacuum problems with air-duct flap acutators (vacuum motors.)

Lots of information here if you use the "search" feature.

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1998 3.8 Dodge Caravan 214K
2000 3.3 Dodge Caravan 175K
1949 Plymouth Special Deluxe 4-dr sedan 25K (needs some work!)


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 Post subject: Re: 1996 Heater
PostPosted: Fri Jan 22, 2010 12:16 pm 
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Joined: Mon Mar 30, 2009 11:18 pm
Posts: 1254
Location: Zimmerman, MN
Year and Trim: before cars
Yes, as Bill said, check coolant level first. If that looks good, check everything else he listed in that exact order.


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 Post subject: Re: 1996 Heater
PostPosted: Fri Jan 22, 2010 2:00 pm 
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Joined: Sun Nov 22, 2009 2:09 pm
Posts: 3
Year and Trim: 96 and 98 Bonneville SSEI
I'm not sure. I've never faced this either (or heard of an airmix actuator). Can you tell me what it involves to repair or where I might find it? Anything you can tell me would be more than I know...


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 Post subject: Re: 1996 Heater
PostPosted: Fri Jan 22, 2010 2:06 pm 
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Joined: Sun Nov 22, 2009 2:09 pm
Posts: 3
Year and Trim: 96 and 98 Bonneville SSEI
Thanks all.
I'll start there and see what I can find out
Regards,
Dave


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 Post subject: Re: 1996 Heater
PostPosted: Fri Jan 22, 2010 2:08 pm 
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Joined: Mon May 19, 2008 7:01 pm
Posts: 16782
Location: Central Illinois
Year and Trim: 1992 SSE
2009 G8 GT
Here's our Techinfo article on the actuator.

viewtopic.php?f=49&t=3537

_________________
Image
WHITE WHINE - IT'S INTOXICATING. 1992 SSE Supercharged 236.26 ci (.040 Over)
15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Easy Performance Gen 3 Air/Fuel Calibrator, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers and 10" Subs, 1300 watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, McCoy Motorsports Ceramic Coated Ported Exhaust Manifolds, Fan Override, PowerSlot Slotted Rotors.
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim Trailblazer mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser


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 Post subject: Re: 1996 Heater
PostPosted: Wed Jan 27, 2010 1:36 pm 
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Posts like an L27
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Joined: Thu May 22, 2008 1:29 am
Posts: 797
Location: Spokane, WA WCBF '08 survivor
Year and Trim: 1991 SSE+I. 1994 ssei
sounds exactly like what my 96 did and the airmix actuator was the culprit.

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1991 SSE+I ( supercharged)
1994 ssei


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WCBF '08


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