car heater blowing cold air intermittently

The back of the knob is directly attached to a. My mechanic seems to think that the head gasket is leaking air into the system and that the air is preventing the coolantwater from being properly transported.

5 Convincing Reasons Car Heater Is Blowing Out Cold Air Instead Of Heat Care My Cars

If you dual climate control sounds like it the mode door actuator that controls driver and passenger temp.

. Remove the steering column filler panel. Check and let me know CHECK AND LET ME KNOW. Another trick is to park it uphill or on ramps when its cold and start and warm it up to burp any trapped air out.

The air just quit blowing out cold air. Sensor in the vent checks the temperature and tries. Mazda Car and Truck.

Also cars use flaps to regulate air mix from heater core it is in your dash somewhere to achieve correct temperature. The air just quit blowing out cold air. Browse Categories Answer Questions.

The leak may just be air being sucked in on cool down but usually there is some sign. If i turn it off for about 10 minutes it will blow hot again for again about 10 minutes and then blows cold again out of the defrost vents. The wifes 2008 RX350 is having intermittent issues with the heater.

I removed the control unit opened it up. If that is the case in your car then your vacuum may be failing and is a RELATIVELY cheap fix. When I push the ac button the motor does even drag a little like it used to when turing on the ac.

If I am running defrost it is basically the same hot for a little. Disconnect the air temperature actuator electrical connector. Ask a Car Question.

Only show this user. Sometimes its both hoses other times the hose going in is hot but the other hose is cool. Remove the air temperature actuator screws.

When you turn on AC the drivers side will start blowing HOT air while the passenger side blows cold. Mazda B3000 Car and Truck. To remove the air get the engine up to operating temperature.

Then after a while it will blow some really hot air and then it drops back to cold air and then back to hot air. While your situation the problem is cold air it may be how this system gets stuck in your car. Remove the fuse labeled HVAC CTRL BATT.

It MAY be your vent door fluctuating. Heater intermittently not blowing hot air. It still blows just not cold.

My battery and my alternator and my starter are all brand new on my 2012 Dodge Caravan but the only way that I can get it to start is with jumper cables from another car a jump pack will not start of it Hass to be a job from another car. ImageOpen In New TabZoomPrint 4. When the heater is blowing cold air one or both of the hoses connecting to the heater core do not warm up.

If your car heater blows cold air intermittently you need to crouch down and see if there is a water puddle under your car. The heater was blowing heat and all of the sudden it was blowing cold air and the etc light came on. ImageOpen In New TabZoomPrint 3.

Up to 8 cash back Harold R. When you put all the way to hot-cold-hot again the solenoid can get loose and start working again for a while. Up to 25 cash back the first thing you will need to do is check the coolant lavel to make sure it is not low if it is this will cause air to get into the system and the heat will blow cold.

My Rear Control Heater Is Only Blowing Cold. Usually air conditioning starts cool and then goes warm in most cases due to moisture freezing up in the evaporator. It seems that when starting the car from cold when the system is set to Auto and 90 degrees that it starts blowing the fan at full speed way before the engine is warm enough to blow out hot air.

Air in the Cooling System. Ive got an 05 with a loose heat control knobm the loose knob is causing intermittant hot and cold air. On November 10 2016.

I checked the fuses its not that 4 Answers. Blower motor problem since 2500 miles NOW at 10000. So its blowing out really cold air.

2005 Avalance that has intermittent AC problem. Theres probably air trapped in the cooling system. Sometimes it will leak water on the front passenter side under the console.

Even When Using Either Aux Or Front Controls. As it is said earlier your coolant is a mixture of 50 water and 50 antifreeze and if any of this is leaking it is a problem. And it doesnt matter if its in dual mode or if the temps are separate.

18 May 8 2010. I am having trouble with my ac in 2005 GMC Yukon. Also while driving suddenly it stops heating and just blows out cold air.

So its really all over the show. Up to 25 cash back I have 2002 TC 33 V6 that problem is the heater it will blow warm air but blows cold air at the lower vents by my feet. With the engine idling loosen the upper radiator hose clamp.

When i run my heater it blows hot for 10 minutes or so then it blows cold air out of the defrost vents. While idling the heater blows but doesnt produce hot air. Heater is working intermittently in my 2002 Mazda b3000 It blows cold air for the past few days until I mess with it - Mazda B3000 question.

Second this time 111208 they could not duplicate the problem. But yes it sounds like the coolant is low. Sounds like you have air in the system.

A car heater can fail in several ways but when it blows cold air the two likely causes are that the coolant isnt flowing through the heater core or air from the blower motor isnt being directed through the heater core. Check the radiator when the engine is cold and it should be 100 full. It still blows just.

Air Temperature Actuator Replacement Removal Procedure 1. First id replace the radiator cap and make sure the overflow res is full to the mark. Many cars though not all some use a push-pull rod or cable use vacuum assist to open and close the behind dash vent gate between hot and cold air andor freshrecirculate air.

I had a long talk with the service manager and he said they had to duplicate the problem in order to try to fix it. Whenever evacuating or recharging the AC system if care is not taken the contaminated air can enter the system. Two years ago a mechanic replaced a part and it.

No other warning lights are active on the display. First time they thought it was a loose connection to the blower motor. You might get surprised to know that the most common reason the car air conditioner blows cold then warm is MOISTURE.

If not there is some sort of a leak.

Car Heater Not Working Blowing Cold Air Why How To Fix Youtube