car heater blowing cold air at idle

I have a 2001 Chevy Impala I had the problem with cold air blowing at idle. HEATER BLOWS COLD WHEN DRIVING THE CAR HOT WHEN IDLESIf you car heater starts blowing cool or cold air when you drive you car on the highway in cold weather.

Car Heater Blowing Cold Air Possible Reasons And What You Should Do

The heater core is where the heat comes from.

. It has a pressurized coolant reserve tank and no bleeder valve. Look for puddles of coolant under the front of your vehicle. When I shut of the engine but leave the.

Heater blows cold while in idle but hot while running. If your car heater is blowing cold air it could indicate that theres a problem with your cooling system heater core heating valves or blower fan. Heater is blowing cold air when sitting at idle.

Replace all worn and suspicious-looking hoses or have them replaced make sure all clamps are tight and check for leaks when you are done. My car has 197000 miles. It helps keep the car engine cool especially during peak months of summers.

The key was to finally locate the source of OBDII code PO 0171 left bank lean which I realize was not part of my original question. I can start the car and let it warm up for 30 min and it will still blow cold. The most common problem when the heat is not working in your car is actually a low coolant level.

Hi I have a 2002 Ford F-150. While driven fo 5-10 min in starts to blow hot air. So this past Saturday I had a coolant flushrefill done hoping that would resolve the issue but it still blows out cold air when I come to a stop or.

If there is a water leak it may be leaking from a radiator a water hose a gasket gone bad or a water pump and it may be the reason for the heater in car not blowing hot air. This should effectively get rid of the air bubble and return the heater to normal. When I make a stop like in traffic then it starts to blow cold air.

Jump to Latest Follow 1 - 20 of 20 Posts. I filled the reservoir to the line now I have heat on idle. Engine coolant is delivered to the heater core through two heater hoses.

Check the heater core. You may also find a dripping or wet area on the. If you notice the coolant level dropping top it off.

My problem is that the blower will only blow cold air but when you apply gas and rev up the engine the air will begin to get warm but if brought back down to idle the air will slowly become cold again. In most car models it does also says coolant in text on the cap of it. The same as the engine oil the coolant is in a sealed system of your cars cooling system.

Cold air blowing out the heater when on idle. Up to 8 cash back Q. You may have trapped air in the cooling system or the heater core may be partially plugged up.

The car coolant comprises of 50 antifreeze and 50 water. Car heater is not blowing cold air Causes. Put a paper under the car and let it.

My car has an automatic transmission. Load full table of contents. Ive read about air in the cooling system as a common cause for Nissan Frontiers and Titans.

What is Ohm Scale Chart. Ive read some posts and as far as I can think now it might be the auxiliary water pump which has the role of circulating the coolant when the water pump its not kicking in. With the engine idling at normal operating temperature set the temperature control knob in the full hot position the mode control switch knob in the floor heat position.

If your dashboard thermostat is stuck on the C gauge even after your engine has had adequate time to heat your thermostat could be broken. HEATER BLOWS HOT AT IDLE COLD WHEN DRIVING DEMONSTRATED ON DODGEIf you have a car that blow warm hot air at idle but when you start driving down the highway. In the defrost mode the air will be dehydrated by the evaporator then heated by the heater core for hot dry air on the windshield.

Is there a good way to bleed the system of air. Hey guys 2003 35 and when the car is driving I get regular heat coming out the vent but when I stop idle it starts to get cool again. Only show this user.

Ive squeezed the upper coolant line and release one air bubble but it did not fully fix the issue. Ive already done a quick search came up with coolant issues low possible air in system. Anyways I found a leaky air hose connection between the manifold and the MAF once I corrected it the engine idle smoothed out and now we have heat as designed at idle.

I took off the radiator cap and filled the radiator to the top and got rid of the air bubble. Discussion Starter 1 Dec 21 2011. If the thermostat cant signal to the car that the engine is warm the coolant wont be sent over to provide heat to your heater core and the air will stay cool.

Luckily the coolant level is very easy to check. On cold days when you have to travel by car the first thing on your mind might be turning your heater on full blast to cozy up. When you start the car heater during winters the coolant travels through.

You may have air trapped. Locate the coolant reservoir Usually a red green or blue fluid. When the car is first started and warms up the heat should begin to blow warm air.

If you notice that your thermostat gauge stays on the C even after the engine has time to heat up you may have a broken thermostat. Okay my car is blowing cold air at idle and heats when push the gazlevel of coolant seems good but i cant figure out how to read it with that floating thingneed help cause its cold outside. Given below are the three reasons why your car heater system suddenly starts blowing cold air even in winters.

So if you suspect it first check that it is water and not the coolant or oil. As usual when the engine heats up after driving for a while hot air starts coming through. This can keep your coolant level too low especially in older cars.

Why Is My Car Heater Blowing Cold Air Wheelzine