Santa Fe (CM - 2007-12) :: Heater Won't Heat When Driving But Blow Hot When Car Is Idle
Jan 12, 2012
I have a 09 santa fe and it just started doing this. when we start it and let it warm up it will get the normal temp and will blow hot air but when we start to drive the thermostat goes back down to cold and it will blow cold air. I have had a problem similar to this before and taken it back to the dealership and they replace the same thing over and over. but this time its not fixing itself and it is staying like this. usually it will fix itself.
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Model is 2006 2.2l Diesel (Europe - so second gen)
I've noticed that as the weather has gotten cooler my heater just doesn't heat up at all under normal driving conditions. I can see the actuators moving at the back of the unit and the car seems to get up to temperature fine.
When climate control is set to auto the A/C seems to come on intermittently which I find quite odd even when I have the temperature up quite high. If I leave the car in park and rev the engine heat will start to come through the vents, but this doesn't really represent normal driving conditions.
I have noticed small patches up water under the car when it's parked, so assumed there was a water leak, but when I top up the water it quickly overflows. So I'm thinking it might be an airlock maybe?
I'm really stuck, just want to see if there is anything I can rule out before I drop it into a garage to see if they can get to the bottom of it.
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Cannot figure out how to get the heated air to flow through the back via the rear vents. All I get is outside air. I cannot find anything about it in the manual. The dealer has no clue but is trying to find something on it. New 2009 Santa Fe Limited.
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2005 Elantra here with 120k miles
Problem: Not heat will come out unless
1) I don't turn on the Fan Motor at all. Very Nice heat will "bleed" out of the vents as long as there is no Fan on - on any setting.
2) Lukewarm heat will come out if I am giving the car gas or revving it. As soon as it goes back to idle or I am no longer giving gas it goes back to no heat at all.
Things I have tried:
Topped up the radiator and tank (radiator has been replaced)
Water pump replaced
No leaks
Thermostat is opening ( Upper hose gets hot, Lower hose stays cold for a while and then gets hot)
Flushed heater core with a garden hose.
Inlet hose to heater core is hotter than outlet hose but outlet hose is not cold to the touch.
Radiator cap has been replaced
Car does not run hot at all
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My heater works when engine on tickover then stops working after a mile or so driving. I have taken heater hoses off and it does not seem blocked and have replaced the engine thermostat. Now what can I do??
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I have a 2007 2.7-liter Santa Fe with 71,000 miles. I experience intermittent rough idle and rough low speed driving. It seems that in town driving will trigger these conditions. And when it's warmer outside that oppose to colder temperatures.
In most cases I can turn the car off, and after 2-5 minutes, start it right back up and the problem with go away.
The OBD codes are P0276 and P0306.
I have replaced the coil and injector on #6 cylinder.
The #6 spark plug is dry when the problem occurs.
I had the dealer update the ECM software
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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???
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When first starting a 2012 Sante Fe GLS with standard AC each morning, the vents blow warm for up to 3-5 minutes and therafter are fine. Additional starts for the remainder of the day seem fine. We live in a hot climate, but our 2011 Sonata, which is parked in the same garage, does not have this problem. No unusual soundsor lack of air circulation, and after 5 minutes it spontaneously starts to blow cool air. Problem began 2 months after purchase.
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So a recent problem on my 2012 sf.. the front vents blow hot and the rear blows cold.?
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I have a 94 ford Taurus all of a sudden my ac doesn't blow cold and my heat doesn't blow hot. Also every now and again I hear a sound like an alarm clock coming from passenger side??
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I have to admit this is for my 2001 Civic EX. She warms up easily in summer and winter, never overheats, has a new thermostat and flushed radiator and gives plenty of heat when driving....but as soon as you stop at a light or sign no heat...drive off and you have heat. I was thinking clogged radiator or heater core...hoping it's the former.
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I took the 2008 Santa Fe Limited into the dealer for no control over heat in cabin. It turned out to be a air mixing valve actuator failure. Since the car had 60714 miles on it I needed to convince the dealer, since this is a common failure, that Hyundai should stand behind it. Since it failed before I brought it in, it failed before the 60k mark. The dealer supplied the part and I the labor.
Before I brought it in I replaced the thermostat. An old school problem fix for insufficient heat. That did nothing. Upon disassembly i found it very difficult to get at. You need a lot of patients to do this task and reversible wrists and elbows due to its location.
Also, in looking up the control system in the Factory Repair Manual I discovered this Limited heat/AC panel has an internal self-diagnosis that you can trigger. It did indeed indicate a faulty actuator. The dealer was not aware of the self-diagnosis facility having not been taught it by Hyundai during training.
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I have a 2007 Santa Fe that will only produce heat on the driver side of the vehicle. It does not have dual climate control. So I changed out the heat control actuator and it did not work. I manually moved the lever and still nothing. The air will go from all sections perfectly.
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I have an 07 prius with 105k miles. It had no warning lights on and drives great with 1 exception. The heat gets cold at idle, it works great as soon as i drive or if the ICE starts to charge the battery. I believe the problem was the ICE not coming on to heat it back up, it would only come on if the battery drops not if the air temp drops.
Then my mechanic replaced the pump on the coolant heat storage tank and it made no difference so he put the old one back on. However since then the ICE will occasionally kick on for heat even if the battery is charged (like it should be) but not frequently enough and sometimes not at all.
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Well of course with the coldest weekend of the year coming up my heat stops working.
When I'm driving it pulls heat off the engine just fine but stopped it just blows cold air.
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My 2007 suddenly wants to give no heat when idle...as soon as I begin moving again the heat blows hot, but when stopped at a light or sitting in park the heat only blows cold air...
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Today, while driving on the highway, my heater just quit working. My car is equipped with the automatic climate controls and so I switched it to manual mode to see if the heat would come back. The heat does not seem to be mixing at all with the air.
One weird thing is that if I set the temperature to 90 degrees then the A/C mode will turn off and blow pure hot air. However, if I go to 89 degrees then the heat will stop and the A/C will turn on again. Turning off the A/C manually does not bring the heat back.
What could be wrong? I might just try unplugging and reconnecting the controls since I was messing with the radio a couple of days ago.
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My 2009 Santa Fe GLS a/c, heater, etc. blower has stopped blowing air. I have checked the fuses, did the push test on the air adjustment button but nothing has worked. Sometimes it's like I can feel a VERY SMALL amount of air blowing out the vents.
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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?
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My 2008 Santa Fe has a problem where the heater & A/C work fine, the fan is blowing a lot of air but it will not switch between the defrost, heat & floor locations. Right now about 90% of the air is blowing out on the floor(freezing my feet with A/C) while about 5% comes out of the dash vents and 5% out of the windshield vents. No amount of adjusting will change these. I've changed the cabin air filter which didn't work and have ruled out the fan as it sounds great and pushing a lot of air out at the lower vent.
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2007 GS 350 109,500 miles. My heater was blowing cold at idle and warm when driving so I took it to dealer. To my surprise, dealer says its a blown head gasket. No other symptoms. No white smoke, no smells, no warning lights on dash, and running fine. Just had VVT gear recall done last week.
Fortunately I have Lexus extended warranty good thru 125k miles and Feb 2014. I do my own maintenance (plugs, oil changes etc). Have records for all. But have not done coolant change (due at 100k).
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