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The heater core in the Chevy Astro van acts like a small radiator that the engine coolant passes through. If the van's heater has trouble working, you may need to replace the core....Heater Problem #1: No hot air. Not blowing hot air is one of the most common issues encountered in central heating. ... If your heater turns on but it's blowing cold air, turn it off and check to make sure there's nothing obstructing the blower. ... The heater runs for about 15 mins then stops (display panel shows reset). After resetting ...My issue is my heater blows lukewarm for a few seconds when first turned on, and then quickly blows cold. I have flushed the heater core, and both hoses are warm to the touch. I just replaced the G89 sensor, which didn't seem to change anything. My engine is heating up as is should and is not overheating.4 posts · Joined 2021. #1 · Nov 1, 2023. The dreaded hot air issues finally happened to me as well, and just in time for winter. The side vent on the drivers side will blow warm air (still not that hot) while the center and passenger side vents blow ice cold. Even long after the engine gets up to operating temp.rat said: If the truck is getting up to temperature the thermostat wouldn't be the problem. The heater core could be cloged. Take the hoses off the heater connections on the firewall, and try running some water through it. Also check the coolant level, if it is low the heater won't work worth anything.2001 CHEVROLET TAHOE. 5.3L. V8. 2WD. AUTOMATIC. 186,500 MILES. Hello all, Our heater blows hot for about fifteen to thirty seconds when first turned on and then goes lukewarm to cold. The heater works almost always when all controls are off with the temperature set to max hot with the outside air coming in (this is not a dual temperature …The heater passes hot coolant into a tiny radiator from the car engine. This radiator is also known as the "heater core." When the coolant gets to the heater core, the blower motor then blows air across it. This air gets heated and then passes through the vents in the car to reach the occupants of the car.109. First thing to check is if the thermostat is stuck open. If so, the coolant will never heat up to provide heat. Honestly, thermostats are cheap, if you are taking it out to check it would be wise to just replace it. Good time for a coolant flush and replace. If that doesn't fix it, and the coolant level is good, you could be looking at a ...there is NO valve to send coolant in to the heater core. that is an old troublesome technology. as I stated before the heater core is always hot. it is the blend door/s that do all the work. so if you have no heat it is usually 1 of 2 things. 1. blend door/s not working or not being told to work. 2. clogged heater core.Trapped air can make them feel hot too. Pop the coolant caps, squeeze the heater core hoses, you should see or hear some coolant movement. If you just hear air or the coolant level drops a little, obviously trapped air. You can also jack up the front end, 12" to 24", and run the vehicle to help get some air out.If you own a 6.7 Cummins and your heater is blowing cold air, there are a few things that could be the culprit. First, check to see if the engine coolant level is low. If it is, add more coolant until it reaches the full line on the reservoir. Next, check the thermostat to see if it’s stuck in the closed position.RECENTLY PURCHASED AND THEY SAID THEY FIXED THE ISSUE AND STILL NOT FIXED ALSO THE HEATER WAS BLOWING HOT THEN COLD ... the heater blows cold air on the drivers side but hot air on the passenger side. ... 1997 jeep grand cheriokee 318 v8 engine compressor kicks on lines are cold going into the firewall. Blows hot air as in it feels like the ...The response may depend on model or heater type ( manual or CC ). Likely the heater core was leaking and it has been bypassed. On our Sportages there is no relay to control the coolant circulation inside the heater core, coolant always circulate inside the heater core, but there is a cap that when is closed prevent the air warmed by the heater ...2023 Aviator Reserve 201A. Callsign. VE3. September 27, 2021. #9. Djones65# said: 2013 Ford Explorer XLT when heat is on it blows heat on driver side and cold on passenger side. Welcome to the Forum. That is usually an indication of an issue with the blend door or blend door actuator on the passenger side.It's been into VW four times now and they are still struggling to fix it. Initially the heater would suddenly blow cold after driving for about an hour. Also the heat was only luke warm. They flushed the heater matrix twice and replaced a flap motor. It's stopped going completely cold but the max temperature from the blowers was 43 degrees ...I have a 2005 Taurus 3.0 Flex Fuel. The a/c works great -then all of a sudden it gets warm - if i keep it on and keep driving - it gets cold again. The blower motor is working, system was recharged last season, compressor is on even when blowing warm, blower motor works, heat/defrost, etc also works. This happened last year - I had system ...A clogged filter is one of the leading reasons for a heater blowing cold air. But even if you swap the air filter with a brand new one, dirt and debris can still be found within the unit. This could eventually lead to overheating. If your furnace looks pretty dirty, call an HVAC provider for a professional clean.Reason #3: Faulty Thermostat or Wrong Setting. A faulty thermostat setting actually happens pretty frequently. Sometimes buttons get bumped or switches get moved accidentally and your system could actually be set to "heat" or the fan could be set to "on". If the fan is running continuously, the air may feel warm when the air conditioner ...A refrigerant leak is a less common but potentially serious cause for a portable air conditioner blowing cold, then warm air. If the unit develops a leak in the refrigerant lines, the refrigerant level may gradually decrease over time. As a result, the AC's cooling capacity diminishes, leading to cold air initially but eventually ...I would really be leaning towards a issue with a plugged up heater core. To test feel the hoses when the air is warm. And then when its cold feel them. Do you note a temperature change/ hoses I am refering to are the heater core hoses. They are about inch diameter and they run through the firewal to the heater core.If you have a wire in the R terminal and a wire in the Rc terminal, the jumper selector switch must be in the "2 Wire" position. Check your wiring. If you have a heat pump, you will not use a wire in the W terminal. Move the W wire to the W2 or Aux terminal. (W controls your first stage of heating for Gas/Oil/Electric systems.If neither of those is the cause, then the heater core and ancillary components are likely culprits. If hot coolant isn’t circulating through the heater core, perhaps a valve isn’t opening to ...Hi all, looking for your help, this subject has been covered many times but with no definite answer to the problem. Ok here goes have a Octavia 1.9tdi Elegance with heater blowing cold air all the time when the temp gauge is sitting at 90, if I dip the clutch and rev the heat comes through for awhile then goes cold again, so I decided to change stat and it worked great for a day then the next ...Reason 1: faulty heater blower motor. A faulty heater blower motor is a common reason for the heater in your car blowing cold air or not blowing air at all. When the blower motor is working properly it sucks air into the climate control system via the cabin filter. If you've got the heating turned up in your car then this air then passes ...

Open your cabinet and look for the coil. Mark the place with a white paint or primer once you've located it. Because you'll need to unbolt them and slide them out. Once you've done that, vacuum the coils and cabinet to remove debris using a vacuum hose. Caution: While you clean, make sure your heater is turned off .Find somewhere else to keep these household objects. In addition to using less energy, part of the appeal of tankless hot water heaters is that they take up less space than traditi...Feb 12, 2019 · Solution: Set the heater to its maximum setting, remove the coolant tank cap and fill it to the proper level. Start the engine with cap still open and let the engine idle for a few minutes. If the coolant level should drop as the thermostat opens, top it up as necessary. This should bleed off the air bubble.Although I had only known him for 24 hours, I trusted Jesper. More than anything, I didn't want to disappoint him. Photos: Benita Hussain WE WERE LOOKING at the same things: the sc...These are the reasons why an electric fan heater blows cold air instead of hot: Thermostat set below room temperature. Clogged air intake. Clogged air outlet. Loose wiring. Broken heating element. I've listed them in order of how likely it is you can fix the issue. Let's take each in turn.

971 posts · Joined 2010. #3 · Oct 29, 2010. i have the problem too. hot air will blow in when im driving and the air is not on. i read its like this for every charger. that air tube where the air flows is by something that is hot and warms up the air and will stay there till you turn on the air. i run my air till it gets nice and cold and it ...Replacing an old water heater can help ensure that you always have enough hot water in your home, and it might also save you money on your income taxes. The Internal Revenue Servic...…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. 1 Answer. Feel the heater hoses when it blows cold air--they should . Possible cause: 3. AC only blowing hot air. There have been reports that the AC in some Silverados .