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11 answers

I would suspect a vacuum leak in the little plastic hose that goes to your heater valve. It is located under the hood on a heater hose near the heater. If there is not enough vacuum at idle the valve will close.

2006-12-08 12:29:53 · answer #1 · answered by tronary 7 · 1 0

The most likely problem is the heater core. I work as an assistant manager at a repair shop and had a car come in today with the same problem. When the car is running, there is enough pressure in the cooling system to keep the air flowing through the heater core, but as soon as the engine slows, the air flow decreases causing the air to feel cooler. Most likely the heat you are feeling is coming from the engine, not the heater. Take it to a shop and have them do a pressure test to make sure. Good luck!

2006-12-09 16:25:06 · answer #2 · answered by sweet_mel0024 1 · 0 0

Yes it could be many things. The coolant level could be low, the heater control valve could also be an issue (if your vehicle even has one, not all do! We don't even know what car this is, be careful with your answers.) Also as far as your vaccum leak is concerned. Your HVAC system may not rely on vaccum. If it does, under acceleration is when you have a drop in vaccum not at idle. You will have the most idle under engine braking conditions and the least under hard accelerations. Idle would fall in the middle. At idle your engine should be pulling steady vaccum of about 15lbs or so under normal healthy conditions. So throw that answer out it is no good.. In my personal opinion, based on experience, I would urge you to first look at your coolant level and from there look into replacing the thermostat. It is not expensive and In the past about 12 years I have seen this be the cause of this condition a good 90% of the time at least. Hope this gives you some guidance.

2016-05-22 21:35:27 · answer #3 · answered by ? 4 · 0 0

This is most likely a problem with your heater core. It could be as simple as a hose popped off of the supply or intake to the heater core. That should send you in the right direction.

2006-12-08 11:23:06 · answer #4 · answered by Mazer 1 · 1 0

Hey I have the same car and same problem.Mine is a 2002 Altima only difference.

2006-12-10 06:59:35 · answer #5 · answered by jdottk 1 · 0 0

That's a strange one. Does it blow cold air the minute you stop moving or does it gradualy get colder? If it gradualy gets colder you may have a thermostat that's stuck open.

2006-12-08 11:21:14 · answer #6 · answered by stoaste 2 · 1 0

well at first when u turn on ur car , the engine is cool and the termostat is not ready still . if it happens after engine works for minutes , u shoud have it repaired

2006-12-08 11:39:25 · answer #7 · answered by Anonymous · 1 0

check the thermostat or water pump. you're getting warm when moving cause it's venting from the motor

2006-12-08 11:21:53 · answer #8 · answered by Lg 4 · 1 0

check your coolant level.

2006-12-08 11:20:49 · answer #9 · answered by bungee 6 · 0 1

go to the shop if its really noticable

2006-12-08 11:19:57 · answer #10 · answered by Doss 2 · 0 0

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