Lexus GS 2006-11 :: Heater Blowing Cold At Idle, Warm When Revving / Driving
My '06 GS450h has developed a fault where the heater blows cold at idle and low revs but blows warm when driving or revving the engine at a standstill. The coolant hasn't dropped at all and the car never goes above halfway on the temp gauge. Its starting to get frustrating now the cold weather has set in and temps dropping! Long journeys are ok as at high speeds it stays warm but short journeys are uncomfortable!
I just had a feel of the rad hoses and hoses that go into the matrix (engine side of bulk head) and matrix hoses feel warm (both of them), the top hose to the rad is warm but not hot and bottom hose is cold suggesting the stat hasn't opened yet. Its cold outside so getting the car up to temp is quite difficult without a long drive (rush hour at the mo).
Still I just had the car parked on the drive and cranked the heater up to max and held the accelerator for a while and super warm air blows out. The engine cuts back out as "normal operating temp" has been reached for battery mode and then the heater goes cool again! Still the bottom radiator hose is cool and top hose not massively warm. It has never overheated thus far and I drive 150miles a day back and forth to Reading from Cheltenham 4 nights a week.
Only thing I can think of is a sticky thermostat or water pump not operating sufficiently enough to circulate the water? Its getting colder and short trips where it used to blow warm air nice and quickly (within 3-5miles) are becoming unpleasant!
Lexus ES 2007-12 :: Heater Starts To Get Warm Then Blows Cold Air
My 2007 es350 77k miles. Heater starts to get warm and then it blows cold air. What could cause this.
View 8 RepliesLexus GX 2004-09 :: Heater Blowing Cold Air Out Of The Vent And Car Overheating
I have a 2004 GX470. Now that the weather has dropped I have noticed that my heater is taking a long time to warm up all it does is blow cold air out of the vent. Subsequently I have started to notice that they car will start to overheat. It will never get to the point where it will hit the red but it will go up and then come back down to mid range. There doesn't seem to be anything else wrong with the car, it idles fine, starts fine etc. Could these two issues be related?
View 14 RepliesLexus RX 2010-15 :: AC Blowing Out Of Vent Is Cold But Rear Passenger Seats Warm
So last couple days over the 4th, the heat was over 95.
AC Blowing out of the vent is cold but the rear seats passenger feels warm.
Even with the blower on the higher and temp on the lowest 65 (or lowest setting).
I put my hand towards the rear seat and I feel warm air. Near the vents are cool but its like the AC can't keep up with the heat ?
2010 @ 51k ... 450h ...
Azera TG (2006-11) :: 2008 - Heater Blowing Cold On Driver Side Vent
My 08 Azera blows cold air out the drivers side vent when everything on the right sides blows heat. If I set drivers side 88 degrees it blows some warm air. I changed the cabin filter and that did not work.
View 13 RepliesKia - Sportage :: 2006 - Heater Blowing Cold Air - Temp Gauge Moving Toward Hot - Won't Start Now
On my way home from work I noticed that my heater was blowing cold air. then I checked my gauges and noticed that the temp gauge was moving toward hot. pulled over on side of road car died on me. Husband pulled car home replaced top water hose. Now my car will not start.
View 10 RepliesElantra HD (2006-10) :: 2009 SE - Heater Cold On Idle And Engine Overheating
A few weeks ago I noticed a fluctuation in my car's heater. The heater blows really hot when driving, and blows cold when the car is idling or coasting. I read up on the forums to check the coolant levels, which were full since my last fluid change a few months ago. The next step seemed to be to change the thermostat. I changed the thermostat and the heater acts the same, and since then the car has begun intermittently overheating. The temperature warning will flash on for maybe about a minute, then go back off. I have been running the heater on full blast trying to keep the car from overheating.
This brings me to a couple of questions:
There's an arrow on the thermostat. Does this need to point toward the radiator, or straight up?
In moving the air cleaner housing to get to the thermostat, I lost two of the little clips that hold it shut. Is this critical?
If the thermostat is good, and the coolant levels are good, there's no air in the system and I don't have any leaks, what could this be?
Santa Fe (CM - 2007-12) :: Heater Blowing Luke Warm Air
I have a SF 2009 Limited. Since I bought it 2 years ago, I noticed the heater blows luke warm air. Not hot. It takes 20min for the cabin to reach 22degC when it's only 0 outside.
It was like that when brand new.
It has the auto temp control, so it might be playing tricks on me but I don't think so.
I am tempted to find the pipe feeding the heater radiator and insulate the pipes. Maybe the heater only gets warm liquid.
What else can I do?
Sonata I45 (LF 2015+) :: Vent Blowing Warm Air Always When AC And Heater Is Off
I bought a white 2015 Sonata GLS with 55000 kms on it. Car works fine but really great on gas in city with AC ( 11-12 liters/100 kms ).
And my main problem is my AC/heater vents. Its nice cool day out and I wanna roll my windows up and use outdoor air (with AC off and heating knob on cool - Blue side) but still blow warmer air (the more I turn the temp knob to less cool side more warm air comes out). I went to dealership and complaint about it but they said can't duplicate problem. And I replaced cabin air filter too, but still same problem.
I don't have automatic temperature climate control option, so its all manual, red and blue setting for heat and cold. I complaint them may be my heater stuck on heating but no action taken from them..
Ford - Explorer :: 2002 XLT - Heater Blowing Warm Air Instead Of Hot
My Ford Explorer blows warm air instead of hot air and it's getting colder and my windows get fogged up. I fixed my clicking sound behind the dash.
View 1 RepliesMercury :: 1952 - Vacuum Operated Heater / Air Blowing Out Is Not Warm
My 52 Mercury Heater fan is working now, but the air blowing out of it is not warm and this does not change when I moving the temp lever on the dash. Is it likely just the heater control valve or is there something else possible wrong? I'm not finding anything online about how these systems work and my shop manual doesn't give me much info.
View 15 RepliesFord Super Duty (1999-2016) :: 1997 F250 - Cold Engine - Heater Would Blow Either Cold Or Slightly Warm
I can't seem to get the engine temp to middle range on the marker, but yet my heater blows "to me" hot air. Even while sitting in idle for extended amounts of time I cannot get it to "operating" temperature. I would think if my thermostat was stuck open my heater would blow either cold or slightly warm air. I have the 5.4L engine with knn air filter and no cats.
View 14 RepliesFord F-150 - 1997-2003 :: 2000 F250 Cab Heater Blowing / No Warm Air
This problem is on my son's 2000 F-250 5.4. It's into October and my son tells me he has no heat coming out of his vents. I figure it has to be the control valve that should be in the heater hose lines. Could be jammed closed or a vacuum line has come off the pot that controls the open close cycle. We open the hood and nowhere can we see a coolant control flow valve. It is so tight and dark under all that mess of wires, intake, air conditioner lines and whatever.
Just where should we be looking for the valve. Also it could be the vacuum line is unplugged on the dash, behind the warm/cool selector. And even there is a possibility that some doofus has removed something. He bought the truck this summer. So to get us on the right path, where we start looking for the flow control valve?
Lexus GS 2006-11 :: Tappets Noise On Cold Start Until Fully Warm?
I'm new to the Lexus scene, just got myself a gs300 le 2006 - just had it over a week, amazing car but its sounds a bit tappet on cold starts until fully warm sounds scary... noise disappears once it's fully warm.
for a Lexus to do this is a bit disappointed, have searched around can not really find a fix...
It has full Lexus service history, just changed the oil in hope for the noise to disappear... Castrol edge 5w30... no different
Ford F-150 - 1997-2003 :: A/C Blowing Warm Air At 1500 - 2000 RPMs - Heater Core?
We got our first taste of fall weather in Houston this weekend, and with it I've discovered a new problem with my truck. After the engine was up to temp, I noticed that the heater would blow cold air any time I sat at idle. If you rev up the rpm's to 1500-2000, you can feel the air start to get warm again. I'm guessing this means my heater core needs to be backflushed.
View 4 RepliesPrius (2004-09) :: AC And Heater Are Not Cold Enough And Not Getting Warm
The a/c and heater are not operating properly. Not cold enough and not getting warm. Low freon, compressor going bad?
On a brighter note...I've sat looking down into a volcano that could blow at any moment.
Ford Super Duty (1999-2016) :: 2006 F250 - Heater Will Blow Cold Air Unless Driving At Highway Speed
I have a 2006 f250 and the heater will blow cold air unless you are driving in like highway conditions. If you stop or drive slow it blows cold air only. What is causing this???
View 3 RepliesFord A/C :: Heater Blowing Cold Air
Heater is blowing cold air. What I have checked, coolant level, replaced water pump and thermostat, checked blend door, flushed heater core. When I checked the blend door via the heater treator method I was getting hot air coming off the core but also getting very cold air coming from the A/C evap in side the plenom box. I also pulled the fuse for the A/C clutch and I am still getting cold air. I am look at replacing the HVAC contol.
View 9 RepliesGmc :: AC Blowing Warm Air At A Long Idle
Have a 2003 gmc truck 1500hd. When i come to a stop or at idle , my ac blows warm air out. At cursing speed it blows cold air.
View 5 Replies