Question about 1997 Pontiac Bonneville

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Heater blows cold air

My 97 Bonneville will blow warm air for a few seconds, then cold then back again.

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Try changing the thermostat

Posted on Jan 23, 2009

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Heater temp on high only bows luke warm air after driving. A/C works just fine.Plenty of cold air from it


heater blows cold air idle chrysler 300 Questions & Answers ...

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Why is My Car AC Blowing Hot Air? - BlueDevil Products

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In cold weather heater will not blow warm air unless at idle stopped. when at highway speed blows cold air


check and make sure the radiator is full of antifreeze take off the radiator cap and top off the radiator then take your hand and cover the hole where the cap goes and squeeze the top radiator hose a few times to help it go down that way if there is a air pocket somewhere it will help push it out when you thank your done top off again and replace the cap and try

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1 Answer

I have a 98 Bonneville, the heater/defroster is blowing out cold air. I drove around for 30 to 40 minutes checked the radiator and it was cold to the touch. could it be the thermostat


The dash gauges are notoriously inaccurate. But it is possible that the thermostat is stuck open. Does the upper radiator hose get hot after engine warmed up? Also feel both heater hoses-when engine is warm, both should be hot-indicating the coolant is circulating through the heater core. If heater hoses are hot, and you still have cold air, the temperature blend door on the heater case may not be operating.
Try a new thermostat and see if engine warms up faster and better.

Dec 10, 2013 | 1998 Pontiac Bonneville

1 Answer

The heater in my 1999 Land Rover Discovery Series 1 won't blow cold.


As per your problem mentioned.There are few solved help links to troubleshoot these problems.Go through the list and Click the link below:----
Air conditioner blows air but not cold air http://repairhelpcenter.blogspot.in/2012/07/air-conditioner-blows-air-but-not-cold.html

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Car overheats and Air blows hot at idle? http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

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Heater blows cold? http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

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Heat blows cold on drivers side and hot on passenger side? http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html---------- Hot air on the driver's side vents only? http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html

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2005 Chrysler PT Cruiser: A/C Blows Warm? http://whoisbyme.blogspot.in/2012/06/2005-chrysler-pt-cruiser-ac-blows-warm.html

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1992 Toyota Camry: A/C Control light Flashing and A/C not Blowing Cold? http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html

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No heat, blower blows only cold? http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html

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These will help.
Thanks.

Nov 22, 2012 | Cars & Trucks

2 Answers

Why would my heater blow out cool air when sitting still and then hot air when going down the road and then it's not all that hot


Try flushing or blowing high pressure air through the heater core lines. its sludge build up and need to be flushed through heater core only. check antifreeze fluid level. only put in straight antifreeze, do not mix. most people do not know what mixture should be, so be safe and add straight, it will not hurt it, i run 100% straight antifreeze and never had a problem or worry about it ever freezing and cracking my block, heads or radiator cracking.

Jan 29, 2012 | 2001 Daewoo Nubira

1 Answer

My 99 pontiac montana has a heater problem.after engine is warm the heater blows warm air for a few minutes and then blows cold for a few minutes and then warm again. sometimes it blows warm for a few...


I would change the Thermostat. if that doesn't fix it? I would buy a Radiator flush and follow the directions exactly you will be surprised how much junk comes out. That should fix all your heat problems.

Jan 07, 2011 | 1999 Pontiac Montana

2 Answers

My 2004 Z71 Suburban rear air blowzs warm sometimes. It starts out cold then all of a sudden it blows warm/hot. We turn off the rear air for a couple of minutes and then back on, it will blow cold again...


sounds like you have a leak in the system and have air that has entered into the system.
best to have it serviced by a shop, the system will need to be inspected to find the leak and then evacuated. part replaced and refilled.
leak detector will be okay

Do NOT use the cans of refrigerant with sealer in it.
and do not let the shop put a sealer in it, in the long run this will cost you the replacement of the whole a/c system.

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1 Answer

CHRYSLER TOWN & COUNTRY 2003 HEATER PROBLEM


Have you checked the coolant level? If it's low, it will result in diminished heat, and could be the problem.

Mar 20, 2009 | 2003 Chrysler Town & Country

2 Answers

Heater


heater core may be going bad...things to check.. heater core, thermostat, anti-freeze/coolant, wires to the heater.

Mar 13, 2009 | 1993 Pontiac Bonneville

1 Answer

My 96 bonneville is blowing heat


sounds like the vacuum lines that direct the air over the evaporator is maulfactioning and let it blow air over the heater core all the time

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