hot air coming through vents with heat turned OFF
05-02-2011, 06:19 PM
#21
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Okay...
Has anyone with the "hot air coming out with the selector set on cool" issue tried adjusting the temp knob into the hot range from the cold range during cool weather vs warm weather and observed the difference?
During warming weather, you are simply NOT going to get cool air out of the ducts without employing the a/c compressor. The air-intake for the cabin climate control system sits under a plastic guard just beneath the rear of the hood and right behind the back of a nice toasty engine and exhaust header. Warm air is going to wash over that thing constantly once the engine warms up.
If you can get REALLY hot air coming out of your vents in warmer weather when your temp selector is set on hot and then only 'warm' air when it is set on cool, then I would say your system is operating normally....
Very few modern cars will deliver very cool air w/o employing the a/c compressor because they all utilize a very similar fresh air induction system.
Nothing to see here folks....
Has anyone with the "hot air coming out with the selector set on cool" issue tried adjusting the temp knob into the hot range from the cold range during cool weather vs warm weather and observed the difference?
During warming weather, you are simply NOT going to get cool air out of the ducts without employing the a/c compressor. The air-intake for the cabin climate control system sits under a plastic guard just beneath the rear of the hood and right behind the back of a nice toasty engine and exhaust header. Warm air is going to wash over that thing constantly once the engine warms up.
If you can get REALLY hot air coming out of your vents in warmer weather when your temp selector is set on hot and then only 'warm' air when it is set on cool, then I would say your system is operating normally....
Very few modern cars will deliver very cool air w/o employing the a/c compressor because they all utilize a very similar fresh air induction system.
Nothing to see here folks....
05-02-2011, 07:31 PM
#22
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Originally Posted by lowerlattitudes' timestamp='1304384059' post='20530933
Okay...
Has anyone with the "hot air coming out with the selector set on cool" issue tried adjusting the temp knob into the hot range from the cold range during cool weather vs warm weather and observed the difference?
During warming weather, you are simply NOT going to get cool air out of the ducts without employing the a/c compressor. The air-intake for the cabin climate control system sits under a plastic guard just beneath the rear of the hood and right behind the back of a nice toasty engine and exhaust header. Warm air is going to wash over that thing constantly once the engine warms up.
If you can get REALLY hot air coming out of your vents in warmer weather when your temp selector is set on hot and then only 'warm' air when it is set on cool, then I would say your system is operating normally....
Very few modern cars will deliver very cool air w/o employing the a/c compressor because they all utilize a very similar fresh air induction system.
Nothing to see here folks....
Has anyone with the "hot air coming out with the selector set on cool" issue tried adjusting the temp knob into the hot range from the cold range during cool weather vs warm weather and observed the difference?
During warming weather, you are simply NOT going to get cool air out of the ducts without employing the a/c compressor. The air-intake for the cabin climate control system sits under a plastic guard just beneath the rear of the hood and right behind the back of a nice toasty engine and exhaust header. Warm air is going to wash over that thing constantly once the engine warms up.
If you can get REALLY hot air coming out of your vents in warmer weather when your temp selector is set on hot and then only 'warm' air when it is set on cool, then I would say your system is operating normally....
Very few modern cars will deliver very cool air w/o employing the a/c compressor because they all utilize a very similar fresh air induction system.
Nothing to see here folks....
My experience with my s2k agrees with what lowerlattitude said -- even when I have the temperature dial set to the 'coldest' setting with no A/C, the air coming out of the vents is never cold, even when the outside air temperature is. I believe this is for the reasons lowerlattitude mentions (basically, because the fresh air inlet is near the base of the windshield on the passenger side and is drawing in air that is above ambient temperature due to engine bay heat). I frequently use the recirculate button to prevent hot air from blowing on me while driving, as I'll get warm air streaming out of the vents even with the fan completely off. Once I turn on recirculate, the air stops coming out of the vents immediately.
Short version -- your car sounds fine to me
But maybe I'm not completely understanding your story 
05-02-2011, 08:04 PM
#23
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Originally Posted by F1SpeedTrap' timestamp='1304309784' post='20527636
[quote name='Johnny Walker' timestamp='1304306653' post='20527498']
Do you have any problem with switching the airflow between different exits? When you switch the selector between defrost, floor, and the regular vents does all the air come out of the vent/vents that it should?
A cracked vacuum hose is my initial suspicion, though i could be way off base.
Do you have any problem with switching the airflow between different exits? When you switch the selector between defrost, floor, and the regular vents does all the air come out of the vent/vents that it should?
A cracked vacuum hose is my initial suspicion, though i could be way off base.
Is there a single vacuum hose that you would suspect, or is there a vacuum system where the suggested crack could prove elusive? Thanks to Honda's reliability I haven't become too familiar with the anatomy under my hood
[/quote]
Sorry, not true.
The HVAC controls on all S2k's in all electric. Vacuum control HVAC doors hasn't been on a Honda in the past 20+ years.
05-02-2011, 08:15 PM
#24
Former Moderator
With the blower motor off, air still comes into the HVAC case while driving., in the Fresh air mode. The air being drawn into the HVAC case is pulled from the cowl, an is heated by the engine compartment.
If you push recirculate, a door closes above the blower motor and cuts off the fresh air supply from the cowl. If you get airflow on recirculate with the fan off the fresh air door is not closing all the way.
If you push recirculate, a door closes above the blower motor and cuts off the fresh air supply from the cowl. If you get airflow on recirculate with the fan off the fresh air door is not closing all the way.
09-28-2011, 10:02 AM
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With the blower motor off, air still comes into the HVAC case while driving., in the Fresh air mode. The air being drawn into the HVAC case is pulled from the cowl, an is heated by the engine compartment.
If you push recirculate, a door closes above the blower motor and cuts off the fresh air supply from the cowl. If you get airflow on recirculate with the fan off the fresh air door is not closing all the way.
If you push recirculate, a door closes above the blower motor and cuts off the fresh air supply from the cowl. If you get airflow on recirculate with the fan off the fresh air door is not closing all the way.
I always thought that, in recirculate mode, at least a modest amount of fresh air must still be allowed to enter the cabin. This would be a safety feature to prevent carbon monoxide toxicity in the event of an exhaust system leak.
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