If smoke billows out enough to visibly fill the cabin, then your car's probably on fire. So my 09 caravan is blowing only cold air out of the passenger feet vent. Heat/air only work from rear vents. Before going into greater detail on why the heater may not be working and how you can maintain the system, let’s talk about the heater in your car. why is no heat coming out of my car vents? If you do not feel any air or if you only feel air coming through the vents on certain settings, the problem may lie with the AC’s blower motor or the blower motor resistor. The air conditioner won’t run properly unless your engine is running. However, cold air (from air conditioner) will blow through all vents - including upper dash defrost vent. Heater working but only blows out front vents. Don’t forget to inspect the belts and hoses and have them replaced when they show signs of excessive wear. If a thermostat is stuck in the closed position, it will never allow coolant to circulate fully, so no heat for you. be_ixf;ym_202102 d_06; ct_50. 1998 mercedes/300 sel It was added by the dealer. While it's possible to recharge your air conditioning yourself, that's not the only problem that can arise. What else can I look for? There are exceptions. Read on for an idea of how to resolve the issue. Sometimes blower motors and/or their resistors will fail and stop pushing both hot and cold air through the vents. In the following article, we’ll go over some common causes of no air coming out of vents in one room and how to increase airflow in the air ducts that are affected. Sign in to reply. What's going on … If the temp control is set to warm and you are in motion then hot air is going to make its way through regardless of the heater fan being on. Your car's heating system is not all that complicated. If the bad smell is coming directly out of the cars air conditioning (A/C) system then there are a few methods to try. Overheating may cause steam to come out of your car's exhaust pipe as well. Favorite Answer. However, if I fiddle around with the temperature control I can get the vents on the passenger’s side to blow warm air. If your car has not been overheating or running hot, your water pump is not the culprit. I tried switching it to floor and nothing is coming out. Caravan blowing only cold air at feet 1 Answer. Repair or Replace Vehicle: Questions and Considerations. Copyright © Bill Allen, owner of Mechanics Plus in Casselberry, Florida, says that air flows through a heater core and an evaporator core before exiting the vents. Show Less. User27287 is right, flushing the coolant system will not help as you do not have an issue with your coolant system as evidenced by heat production on one side of the car. I have a 2000 model KW 900, air flow out the vents is very little, cleaned the filter & pulled out the blower & cleaned the heater core the best I could, no better. Set your air conditioning on fresh air for about 10 minutes. A cold winter day is no time to find out your car heater isn’t working. This is normal. Yes No. A kink in the Since you mentioned different temperatures coming from each vent, out guess is that you’ve got a problem with your ventilation system, most likely a blockage in the air box causing the air blend door to not close fully and the air flow to be disrupted to the vents. No heat to feet or defrost. The vents can be adjusted to point at the faces of the front-seat occupants. Fresh vs. The electronic mode actuators move doors inside the HVAC ducts to channel hot or cold air to the desired location. Read on for an idea of how to resolve the issue. Meanwhile both passenger’s side vents are blowing cool air. not sure what is wrong. And some systems are much louder than others. It’s really quite ingenious. Caravan blowing only cold air at feet 1 Answer. i get hot air from the side vents. Used Cars New Cars Car Values Questions More. The dewpoint in southern climates is 70 degrees during the summer, and the air coming out of the vents is 40, so somehow the system is removing moisture (unless it's already been dried somehow, such as by recirculating). Mechanic's Assistant: Do the vents feel cold? 6. One of the more obvious problems would involve the blower fan not pushing any air out of the vents. Sometimes, you may experience no air coming out of vents in one room in your house. Before replacing Heater Control Unit, it would only blow hot air from front vents- With this replacement it will now change from cold to hot and the air flow pressure does change from the front vents when changing the setting dial but there is still no air at all to feet and defrost. it blows out all the others. The fan is the only thing that can actually move air so if you are still getting air flow through the vents I would suggest it is one of the following. I get good heat and air conditioning from my front vents, but when I select floor or defrost vents, the air still only blows from front vents. I tried putting the dial to rear & using the rear control but still no heat & not all vents are blowing air. You can hear it make a noise when you switch from floor to vents like something is opening & closing but doesn't blow out floor vents very good either. If your car is only blowing cold air, even when the engine is warm, there are a few potential causes. If the air temperature near the unit is below Dew Point, this causes water vapor to form in the air and condense into water droplets causing the fog or smoke. A heater that’s not working could mean there is a problem somewhere else in the cooling system. 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