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L67
Aficionado


Name : Matt
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PostSubject: No Heat   no heat? EmptyTue Nov 27, 2007 8:25 pm

I have noticed this problem recently on my 96. When i start the car and let it warm up, hot air eventually begins to come out of the vents like normal, but as i continue to drive, the temperature goes down to warm then to cool without any action by me. The temp on the climate control still reads 90 degrees, but the air coming out of the vents is way colder. I read in the manual that leaving the car in idle can cause this but it occurs while im driving. I have the climate control on manual setting. Help?

Thanks.
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TType_Riviera
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TType_Riviera

Name : Rob
Age : 37
Location : ohio
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PostSubject: Re: no heat?   no heat? EmptyTue Nov 27, 2007 9:36 pm

Thermostat may be stuck open.... heats up just enough while sitting but as soon as you move the thermostat doesnt restrict enough water to heat up..what are your coolant temps??

that or your heater core is half plugged..
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http://www.cardomain.com/ride/2131502/1
L67
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Name : Matt
Joined : 2007-06-05
Post Count : 1125
Merit : 37

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PostSubject: Re: no heat?   no heat? EmptyTue Nov 27, 2007 9:47 pm

My coolant temps are at, or just a little over 200, how would i go about checking these things?
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TType_Riviera
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TType_Riviera

Name : Rob
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PostSubject: Re: no heat?   no heat? EmptyTue Nov 27, 2007 10:06 pm

if you can locate the heater core hoses with your hands safely...while the car is at op temperature....see if one of them is cold.....if so then your heater core is plugged..
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http://www.cardomain.com/ride/2131502/1
L67
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Name : Matt
Joined : 2007-06-05
Post Count : 1125
Merit : 37

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PostSubject: Re: no heat?   no heat? EmptyTue Nov 27, 2007 10:15 pm

I know i probably sound stupid but whats plugging it? and can i unplug it or is this something i would need to take it in for?
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TType_Riviera
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TType_Riviera

Name : Rob
Age : 37
Location : ohio
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no heat? Empty
PostSubject: Re: no heat?   no heat? EmptyTue Nov 27, 2007 10:21 pm

ususally corrosion/sediment, especially if the system hasnt been flushed,and coolant changed as normal maintanance...you could try an flush the system,you can pick up the flush liquid at any autoparts store if your inclined to do it yourself...

on the bright side,it doesnt seem that its totally plugged,it thats the problem... otherwise it may require a new core to be installed. which will probably result in taking it somewhere.
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http://www.cardomain.com/ride/2131502/1
L67
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Name : Matt
Joined : 2007-06-05
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PostSubject: Re: no heat?   no heat? EmptyTue Nov 27, 2007 10:32 pm

Alright thanks for the help
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L67
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Name : Matt
Joined : 2007-06-05
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PostSubject: Thermostat   no heat? EmptySun Feb 03, 2008 1:11 am

I think I'm having thermostat problems again. Last time i was having trouble getting heat and it was easily solved by replacing the thermostat. Now I'm experiencing some spotty heating troubles. All i find my self doing while driving is watch the temp gauge dance between around 170-210. Whenever the temp reads over 200 i get cold air blowing out of the vents until the gauge bounces back below 200 to about 170. The gauge also seems to like to creep past 200 while idling or while I'm stopped at a stoplight. I tried to replace the thermostat again but it didn't fix it. Anyone have any ideas?
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deekster_caddy
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Name : Derek
Age : 47
Location : Reading, MA
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PostSubject: Re: no heat?   no heat? EmptySun Feb 03, 2008 2:01 pm

sounds like an air pocket in the cooling system. Above the thermostat housing is a bleeder screw you can use to let the air pocket out...
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L67
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Name : Matt
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PostSubject: Re: no heat?   no heat? EmptySun Feb 03, 2008 2:44 pm

Sweet, thanks!
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ricos20002
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PostSubject: no heat   no heat? EmptySun Nov 02, 2008 9:51 pm

The heater core has been replaced, no air in the lines but still no heat, the temp is about 200. Also how can I tell if the heated seat is working?
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albertj
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PostSubject: Re: no heat?   no heat? EmptySun Nov 02, 2008 10:04 pm

Sounds like the heater door actuators are not working. There is a posting on this editboard about that, search for 'actuator' and I think it will be one of the threads you find.

Albertj
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SuperRiv07
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SuperRiv07

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PostSubject: Re: no heat?   no heat? EmptySun Nov 02, 2008 10:15 pm

You can tell if the heated seats are working when they get warm lol
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ricos20002
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Name : Robert
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PostSubject: Re: no heat?   no heat? EmptySun Nov 02, 2008 10:46 pm

albertj wrote:
Sounds like the heater door actuators are not working. There is a posting on this editboard about that, search for 'actuator' and I think it will be one of the threads you find.

Albertj

I've tried to search for 'actuator' but nothing comes up. Do u know what side the actuator is on?
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ricos20002
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PostSubject: Re: no heat?   no heat? EmptySun Nov 02, 2008 10:49 pm

SuperRiv07 wrote:
You can tell if the heated seats are working when they get warm lol

Does it get real hot? It seams to get warm but I cant realy tell, I guess I'll just put my amp meter on it
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SuperRiv07
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PostSubject: Re: no heat?   no heat? EmptySun Nov 02, 2008 11:09 pm

well Mine on high get pretty dam hot amd on low is nice and toasty
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99Rivman
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99Rivman

Name : Randall
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PostSubject: Re: no heat?   no heat? EmptyMon Nov 03, 2008 4:31 pm

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albertj
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PostSubject: Re: no heat?   no heat? EmptyMon Nov 03, 2008 11:32 pm

Thanks Randall.

Albertj
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ricos20002
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Name : Robert
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no heat? Empty
PostSubject: Re: no heat?   no heat? EmptyTue Nov 04, 2008 9:40 am

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ricos20002
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Name : Robert
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PostSubject: Re: no heat?   no heat? EmptyThu Nov 06, 2008 11:02 pm

does anyone have wire diagram for the heated seat?
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RivMan88
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Name : Jeff Best
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PostSubject: Re: no heat?   no heat? EmptyWed Apr 29, 2009 7:37 pm

did you check if the air conditioning is on? When I start my car it takes a while for the AC to come on
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brmcm15
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brmcm15

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PostSubject: no heat?   no heat? EmptySat Oct 10, 2009 8:03 am

alright guys im trying to figure this out before the weather gets any worse and its coming quick so i have to do this fast.......

heres my problem..

-all my vents are blowing out cold air.
-you cannot turn the temp up only down
-there is no disply at all were its supposed to tell you the temp
-but the heated seat and the rear defrost still work good.


so whats the problem with my heat going out??

is the center counsel thing with all the heat controls blow??
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Rickw
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Name : Rick
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PostSubject: Re: no heat?   no heat? EmptySat Oct 10, 2009 9:02 am

Based on what you've described I would guess that it is the HVAC control head in the dashboard.
Maybe someone else can confirm this.

Note: The heated seats and rear defrost are on two totally separate circuits.
So the control head could be bad and these will still work.
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LARRY70GS
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LARRY70GS

Name : Larry
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PostSubject: Re: no heat?   no heat? EmptySat Oct 10, 2009 9:38 am

brmcm15 wrote:
alright guys im trying to figure this out before the weather gets any worse and its coming quick so i have to do this fast.......

heres my problem..

-all my vents are blowing out cold air.
-you cannot turn the temp up only down
-there is no disply at all were its supposed to tell you the temp
-but the heated seat and the rear defrost still work good.


so whats the problem with my heat going out??

is the center counsel thing with all the heat controls blow??


Start with the simple stuff first. The number one cause of no heat is low level in the radiator. You need to remove the cap and verify coolant level in the radiator. The overflow level can still be good with the radiator low, you need to check it. Then I would verify that the thermostat is working and the coolant is coming up to normal temperature. Feel the 2 heater hoses. Are they both hot?


The climate control head can still work with the display blank. Pretty common really. I used a guy on E Bay to fix mine. Excellent service, and he works on an exchange basis, so no down time. It is 80.00 + 10.00 shipping + 100.00 core charge. He sends you a control head that has been totally gone through. You install it, and send your control head back to him. He then credits you the core charge. His number is 860-583-0629.
http://cgi.ebay.com/ebaymotors/95-96-97-98-99-BUICK-LESABRE-DIGITAL-CLIMATE-AC-CONTROL_W0QQcmdZViewItemQQhashZitem41417438ebQQitemZ280271010027QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
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brmcm15
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brmcm15

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no heat? Empty
PostSubject: Re: no heat?   no heat? EmptyMon Oct 12, 2009 5:26 am

Alright i checked the hoses and yes there hot...lol

and yea i saw that on ebay and was debating weather or not that was the absolute problem..

so you guys think that it is all in the control unit in the center console??
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