Prius (2004-09) :: Flow Rate Of The Air Out Of Vents Noticeably Dropped
Aug 12, 2016
Today the flow rate of the air out of the vents on my Prius has noticeably dropped.
It makes no different which vents I select (front, feet, or windscreen).
The blower seems fine - it's still making its normal noise.
The air still blows out nice and cold, there just isn't much of it coming out, even on full blast.
I've pulled the cabin air filter and checked it's not clogged, so it seems like there must be a blockage downstream of the blower.
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I am throwing a code for long term fuel trim being out of whack (code 17560) and I am trying to determine whether the MAF is causing it.
I pulled several redline runs while logging flow rate in vagcom. According to Ross tech's site they suggest that your flow rate should be around 80% of the engines rated horsepower. So approximately 200 g/s. I did several runs and never broke 100 g/s so what I should be seeing or has run into this code before.
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I took my Prius Two to its first car wash today, afterwards, the air flow from the vents became minimal, almost non-existent. How could this be? The car is barely two months old. Prior to the car wash, I had the AC and air blasting to the highest, I didn't change any fan settings, and now there's barely any air coming out. I can hear the fans churning and running, but there's no air!!! Do I take it to the dealer?
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I haven't been needing the A/C til recently due to the heat. When I have passengers in the rear and the A/C is set to just be body flow ( vs. body and feet), the rear blows but is noticeably weaker than the front. When I set it to both body and feet, the rear vents don't have any body flow and it is the same flow as when the rear is just set to feet. I went thru the manual and there doesn't appear to be anything incorrect (I am not in S mode) but the rear is just very weak in general with the controls on full.
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Just started happening this weekend, I can hear air moving and it changes speeds, however I get no flow out of the vents.
I'm at 42k so I'm hoping it isn't a major issue, also tried searching but couldn't find a similar issue. I am pressed for time because I'm leaving for a 2500 mile round trip Wednesday.
I'll add a photo of the controls where I get zero air flow, minus some cold air.
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Problem since new but now I am in cold climate. Seems like there is minimal air flow from vents even if I will set fan to max.. . Dealer does not believe. On the parking flow is present but during driving 70-80 just minimal. I hear the rumble of the fan but air does not come out. Temp setting may be set to 85 but temp inside the car is not above high 60's. I can only survive using heated seats.
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Noticed this, do I have a flaw? When I turn the AC or heater fan off and I'm driving I have constant air flow coming out the vents, super annoying....
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I have a 2003 Forester that has low air flow thru the vents if you try to use the AC or heater.
If you turn the speed from 1-4 you can hear the blower fan turning faster but the air coming out of the vents is very low. YOu can hardly feel it. I checked to see if there was a cabin filter and there was none.
Even though you can barely feel the air coming out, when on AC the air feels cold and when on heat it feels hot.
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Have a 02 with climatronic. You put it on vent and it blows out the vent. You press floor and it goes ape and the fan goes to max and nothing comes out the vents and nothing comes out the floor. IF you put it on floor only there is flow like normal. You can not have it on floor and vent. I drove 2 other passats and they both allow floor and vent. Havent been able to check codes because car has been at dealer for a week.
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I have a 2005 F250 with an intermittent AC problem. I had noticed over the past year that I only had high or low fan when adjusting my AC. Recently my AC has intermittently just not started blowing any air when I turn it on. When this occurs, I can put the fan on high and hear the clutch engage, however no air flow comes from the vents. I did some searching around and didn't find an answer. I was curious, where I might be best to start troubleshooting.
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On my 2006 The air flow from the heater always comes from the dash vents no matter where the control is set. What is needed to correct this?
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I have a 1996 Ford Aerostar 3L. The Air Vents in the cabin are not flowing any air, whether on cold/hot/vent/defrost etc. I can hear it click on but no air flow. I used to have the same problems as some previous posts where the air would only flow in the dash or in the floor but now no air at all. Fuses are all good.
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I have a grand prix and am having problems with the air flow. I think that the diverter is stuck/broke as air flow blows through all vents (defroster, 4 dash vents and floor). When I turn the switch that tells where the air to blow out, nothing happens. In the summer, the A/C works but since it comes out the floor vent my toes get cold. Does this sound like the diverter is stuck? Is there a way I could make the diverter only come out the dash vents? The car has 180K miles and I don't want to invest much money to fix this (i.e. taking to dealer).
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I have a 1997 Toyota Camry and recently the air flow from the heater has become stuck on the front vents. Regardless of what setting I turn the switch to (defrost, floor, etc.) it doesn't switch from the vents. It seemed to happen about the same time the thermostat died, which I had to replace (successfully I think).
I looked under the hood for a vacuum hose that might be disconnected (guessing) and under the dash for a wire that might have come loose or disconnected, but to no avail. I am guessing that some part on the heater has stopped working and needs replaced, but I haven't a clue as to which one...hopefully one that won't require pulling the dash off.
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When the A/C is on in this car, the air flow is split between the defrost vents and the dash vents. I have read it may be a vacuum leak but don't know specifically where to look for it. Is there any way to manually redirect the air flow? Where to look for a vacuum leak? The air is cool but just misdirected.
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Yesterday the temp was at 97F and the air conditioning shut down (air flow remained constant except temp from all vents went tropical). The car was moving at 70mph on level ground in light traffic and not in a city. Stopped and ran a few 'reboot cycles' (turning ignition on and off in three minute intervals with the key out of range) with no luck. The next day the air worked OK - not great - but it was working and the problem returned after one hour of operation. Am I describing a refrigerant level problem or are the electron gods just angry at me for driving in a heat wave?
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My 02 Mountaineer doesn't have any air flow volume out of the heat, defrost, or a/c vents. The temp will change from hot to cold and the air direction will also change from floor, dash, windshield, etc. The a/c recirculation door also seems to be working. The fan sounds as it is running very fast, just not putting out any volume. What should I look for?
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I have an 05 Prius that I bought used. It has 59K miles on it. Recently I took it to the dealer for an oil change. They told me it didn't need an oil change, but did need an air filter. Afterwards, the mileage dropped from about 47 around town to about 42. Had the oil changed a week later, and the mileage is now about 40 around town. The dipstick when cold shows a little above the full mark.
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So I met my wife after work. I was killing some time with my son. We drove across the street, then to a neighboring shopping center. I changed the display to see the more accurate instant MPG and noticed my battery was at 2 bars. This is the first time that's happened, that I'm aware of. During normal operation, it stays at 2 bars above the halfway mark, or above.
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We picked up our 2009 prius about a month ago from a local dealer. At the time it was getting about 52 miles per gallon. Since then, we have driven about 1000 miles and now we are getting only about 41 miles per gallon. Are we doing something wrong that made the MPG drop over 10 miles per gallon.
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I have noticed a significant (15 to 20%) drop-off in mpg in the last 6 months or so. My 2006 prius at 95,000 miles is just short of the warranty on the battery pack. I brought it into the dealership and they ran the routine computer diagnostics and said everything looks good. I fully expected them to tell me that the performance on the battery pack had fallen off, so I was a bit put out. The guy actually got a bit defensive with me when I asked him some further questions about what the criteria are for determining whether the battery back was performing as it is supposed to in order to get the maximum MPGs.
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