car heater blowing cold air intermittently

It will take longer to warm up. The AC evaporator allows providing cool air when you start the air conditioning system.

5 Reasons Your Car Heater Is Blowing Cold Air

Usually air conditioning starts cool and then goes warm in most cases due to moisture freezing up in the evaporator.

. The blower motor is one of the HVAC systems main components that push hot air throughout your car when running the heating system. If your car heater blows cold air intermittently you need to crouch down and see if there is a water puddle under your car. Air from the blower is not blow toward the heater core or the coolant does not flow through the heater core.

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. If you notice that it initially vents out cold air but over the drive goes to warmer air then the problem is likely a frozen expansion pipe. If hot coolant isnt circulating through the heater core perhaps a valve isnt opening to allow that flow or the core itself is leaking or clogged or perhaps developed an air lock if air.

If your cars cooling system has air due to improper replacement of the coolant malfunction of the air valve depressurization of the pipes and their connection points or because of a bad or damaged cylinder head gasket then it can also cause your heater to blow cold air when idling because the air impedes the circulation of coolant in the system which causes the heater. Flapper valve may need to be replaced or cleaned and free from binding up. Whenever evacuating or recharging the AC system if care is not taken the contaminated air can enter the system.

Air in the Cooling System. Check the radiator when the engine is cold and it should be 100 full. 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.

Sometimes it will leak water on the front passenter side under the console. 2000 pontiac montana air conditioner driver side That is correct the air blend door actuator. It is also possible that the heater controls are allowing cold.

When this happens it restricts the flow of the air conditioner refrigerant in the line which means there is a leak somewhere. Up to 8 cash back This problem could be either an engine thermostat that is not keeping the engine at a constant running temperature temp gauge steady in the center or the heater control valve or controls are malfunctioning not allowing engine coolant into the heater core passenger compartment. Sensor in the vent checks the temperature and tries.

Second this time 111208 they could not duplicate the problem. All you need is a shop manual a 14-in-drive socket set and screwdrivers. If the cars heater is blowing cold air at idle you should first check the coolant level and its condition completing the coolant level is the easiest way but not always the best way to fix this issue.

Next you need to check the water pump thermostat heaters radiator heaters tap presence of air the cooling system. When you put all the way to hot-cold-hot again the solenoid can get loose and start working again for a while. Good luck and hope this helps.

The scan tool can tell if the blend door actuator. A new door actuator costs less than 100. If you dual climate control sounds like it the mode door actuator that controls driver and passenger temp.

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. But if your car heater blows cold air and youve checked both heater core hoses to make sure theyre hot you likely have a bum blend door actuator. Sometimes its both hoses other times the hose going in is hot but the other hose is cool.

If not there is some sort of a leak. There could be various reasons for car heater not working but it basically happens for two reasons. When the heater is blowing cold air one or both of the hoses connecting to the heater core do not warm up.

2005 Avalance that has intermittent AC problem. You might get surprised to know that the most common reason the car air conditioner blows cold then warm is MOISTURE. You can usually diagnose and fix the problem yourself in about an hour.

Blend door actuators are the most common reason for the car air conditioning to blow cold air on one side and hot air on the other. Several underlying causes are there for which the coolant and the air. Blower motor problem since 2500 miles NOW at 10000.

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. 2010 Red 20L track. A car heater blowing cold air could be a symptom of the failure of the heating unit.

The leak may just be air being sucked in on cool down but usually there is some sign of dried coolant where the leak is. But sometimes youll face that your car blower motor wont work properly that means car blower motor works intermittently. 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.

Also cars use flaps to regulate air mix from heater core it is in your dash somewhere to achieve correct temperature. 2006 Chrysler 300 My cars heater works great if Im driving but if Im at a light or idiling for a short period the heater starts to blow cold air. Heater is blowing intermittent cold air if not high idiling.

Heater is blowing. They can be diagnosed with an advanced scan tool. Inspect the components to determine where the leak is and seal them.

When you turn on AC the drivers side will start blowing HOT air while the passenger side blows cold. First time they thought it was a loose connection to the blower motor. But yes it sounds like the coolant is low.

While your situation the problem is cold air it may be how this system gets stuck in your car. Two years ago a mechanic replaced a part and it.

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