Car only blows hot air when on gas - Nissan Forums : Nissan Forum
 
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#1 Old 10-14-2010, 02:38 PM
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Car only blows hot air when on gas

I havent used the heat in my car at all this year and when i went to use it this morning it would only blow out hot air when my foot was on the gas. Now this was after about 30 minutes of worming up. Anyone know what the problem could be?

And thanx in advance.
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#2 Old 10-14-2010, 02:48 PM
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You have an air pocket in the coolant system that is stopping the hot coolant from going into the heater core. Very common on these cars. You will need to have the system refilled and bled.


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#3 Old 10-14-2010, 04:31 PM
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thanx
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#4 Old 10-14-2010, 07:36 PM
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did you check your fluid level? Low fluid can do the same thing.
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#5 Old 10-14-2010, 11:30 PM
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yes i did the level is good i just have to flush out all the coolant and i hope that fixes the problem
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#6 Old 10-14-2010, 11:51 PM
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you really dont have to flush the system you can just take the rad cap off when it is cool, start it up let it get warm and run the heat full blast then watch for air bubbles maybe give it a little gas, parking on a slight incline to raise the radiator cap higher will help speed the process up
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#7 Old 10-15-2010, 06:26 PM
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Thanks for the easy solution SL. I just turned the car on with cap off and after about 15mins it worked its magic. Now heat is almost unbearable lol. Thanks Guys
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#8 Old 10-18-2010, 01:49 AM
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I had the same problem. I was low on coolant and I had a bubble. Glad it worked out for you.
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#9 Old 11-01-2010, 02:13 PM
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I'm having the same issue. I parked on a very slight incline then opened the cap, turned it on and blasted the heat but after a few minutes the coolant began to overflow from the radiator with no noticeable air bubbles coming out. Am I doint something wrong that would cause the radiator to overflow like that?
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#10 Old 11-02-2010, 02:41 PM
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Quote:
Originally Posted by mooseman089 View Post
I'm having the same issue. I parked on a very slight incline then opened the cap, turned it on and blasted the heat but after a few minutes the coolant began to overflow from the radiator with no noticeable air bubbles coming out. Am I doint something wrong that would cause the radiator to overflow like that?
the overflow if from the pressure build up as far as i know and i did the same thing parked on an incline and blasted heat had it runninig for about 7-8 minutes and it did it there is another way you can do this that would be to do a coolant flush but i would give it another go before you spend the money for new coolant just a suggestion...
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#11 Old 11-02-2010, 05:23 PM
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Quote:
Originally Posted by bosanac92 View Post
the overflow if from the pressure build up as far as i know and i did the same thing parked on an incline and blasted heat had it runninig for about 7-8 minutes and it did it there is another way you can do this that would be to do a coolant flush but i would give it another go before you spend the money for new coolant just a suggestion...
This is where a radiator flush funnel comes in handy. It will help keep you from having the coolant bubble all over the place.

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#12 Old 11-03-2010, 04:51 AM
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what about it blowing warm air while driving with the fan off? its annoying



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#13 Old 11-03-2010, 12:39 PM
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Two things to look for:

1) If your A/C setting is to draw in outside air but the A/C is turned off, the car will "blow" air. You can stop this by pressing the button for it to recirculate air.

2) If your car is set to draw in outside air but the A/C is turned off, you can "adjust" the temperature of that air by turning the temperature control dial. It will not completely cool the air to have it set completely on cold, but it shouldn't be completely hot either.

Check these two things first.

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