Burning bitter smell coming from vents, heat works intermittently

heater blows cold air idle chrysler 300 Questions & Answers ...

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Find solutions to your heater blows cold air idle chrysler 300 question. ... blow warmair for a few mins then back to luke warm. i replaced thermostat ... HEAT BLOWSCOLD AIR WHEN IDLING ONLY GETS HOT WHEN START DRIVING ... About 15 minutes after driving the diver side vents start blowing straight cold air but the ...

Heater only works when pressing the gas? - DoItYourself.com ...

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Nov 3, 2011 - When I press the gas, the air from the vents is nice and hot. .... So am Idriving a car with a ton of problems, or could the power steering ... Just anotherquestion, when warmed up does the engine temperature ... When the heater is on and I'm not pressing the gas pedal, luke warm air blows from the vents.

Heater blows cool air when stopped and warm air while ...

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RedditFeb 12, 2014 - Heater blows cool air when stopped and warm air while driving 2008 Kia Spectra (self. ... just fine but appears to blow cool air when I was stopped at a stoplight. ... My temp gauge would also be pegged high when at idle / low RPM. ...thermostat only blocks coolant going to the radiator, and the heater core, ...Missing: 300m ‎luke

Why is My Car AC Blowing Hot Air? - BlueDevil Products

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Check if the heater fan works, check pollen filters.

Could it be the water pump

could be an air lock in the heater rad, back flush with a hose to clear.

Have you checked under the hood,Mark? The heater commonly pulls outside air thru the vents and can get air coming up from the engine,so I'd look for a smell outside the car,under the hood.Let me know what you find.
You can alleviate it some by using the recycle air button on your heater,but you need to find the source quickly,so you don't have a fire. don-ohio (:^)

It sounds like the belt is slipping or maybe even the compressor is seized. Just check to see if the compressor is turning.

sounds like the air mix rod is out of adjustment or if vacuum controled, its leaking can you hear a noise in the vehicle or can you find a vacuum hose off in the engine bay hope it gives a little help

Sounds like there is a crack in the vent that leads to the drivers side, and hot air from the engine is leaking through.

Since warm air eventually comes out when the vehicle is in motion, you may have an air mix door that is stuck in fresh or is somehow blocking warm air from the heater core.

To see if the air mix control motor is bad, you need to retrieve your Diagnostic trouble codes (DTC's) from the heater control panel. To run the diagnostic function, do the following:
1. Turn the ignition switch ON (II).
2. Turn the fan switch OFF.
3. Press the recirc control button to select Recirc (recirc light on.)
4. Press and hold the recirc button to select Fresh (recirc light off) and continue to hold the button down until the recirc light comes on for two seconds and then goes off.
5. If the system is okay, the recirc light stays off.
6. If there is a problem, the recirc light blinks the DTC to indicate the trouble. One blink=a problem in the air mix control motor circuit. Two blinks=problem in the mode control motor circuit
Three blinks=problem in evaporator temp sensor circuit.
7. Turn the ignition switch off to cancel the self diagnosis function. Run the diagnostic again after repairs are complete.

Note: the air mix control motor has a rod which connects to a plastic link. The link controls the mix doors and also connects to the heater control water valve via a cable. The air mix motor may check okay, but if the link is broken then you will still have problems. the motor is on the bottom of the heater unit in the front passenger's foot well.

there should be a dial to control the center vents. i believe its in between the vents or just below it. it should have blue and red marks on it. move the dial towards the blue indicator and the air should now be cool. in cold weather, move this dial towards the red indicators for warm air. you can adjust temp at these vents by moving the dial between red & blue.