My car was making a noise, although I would describe it as more of a "hissing" sound, from the heater/AC control panel. It turns out to be the heater control assembly that was bad. I was told another possibility when you hear that noise is the water control valve.
sounds like a system with vacuum controls( found in higher price/luxury vehicles ) for changing settings...def.,floor/heat,vent,etc. a cracked hose-or a hose that has popped off of the 'nipple' it fits on. does it change when you change 'mode-heat,def.,etc? also, there is a ' manifold ' where all the air tubes are joined and feed vacuum to move doors,etc. for heat-def. etc... somewhere under dash-passenger side-or near center that can leak at main vacuum feed. it looks like an cow's udder-clear plastic air lines connect there and go to respective controls for heat, def.,vent,etc. move the hoses a bit- with car runnuing-listen for change in volume of 'hissing'. of course-this problem could be at the control valve in the dash where you make the desired changes for heat,def., etc. the control valve is expensive- i have bought/sold vehicles for 40 years. i am a supporter of 'junk yards '...er,auto recycling businesses. they will pull the part-now you need to find an installer- this is a bit complicated,based on vehicle and location of hissing problem.finally...do all of the options for heat,def., etc. operate correctly-try runniong the system "thru the paces" a few times and listem for changes,location-as i said before-good luck...
A whistling noise indicates a vacuum leak.
voluntary, you cause your lips to form the shape to whistle, and cause the air to be pushed out. if whistling were involuntary, you would do it without making an effort (like your heart pumping, digesting things, etc)
The head gasket is about to blow.....Typical ford..
A bad compressor belt can cause a whistling noise while running the air conditioner. A bad engine can also cause this noise.
Plugged catalytic converter
Check the fan belt; it may need to be tightened.
"Whistling" sounds are generally vacuum leaks. Start around the EGR valve and/or air intake de-icing assembly.
It rusted out
Sorry forget to mention it in the motor.
Try clreaning or replacing your faucet aerator. The faucet doesnt remember the words.
The most common cause of the whistling in a 2003 Impala is a vacuum leak. Any of the lines under the hood could be causing the noise.
a bad water pump could cause low heat. The heater uses the coolant from the pump to generate heat.
low water, bad thermostat, vacuum door not working, clogged up heater core, heater valve broken........
windshield leaking heater core or heater core hoses.
vacuum or air intake hose leaking or disconnected or loose...? good luck:)
Yes, dolphins communicate by clicking and whistling.
Your heater relay switch may be bad
The lips vibrate when whistling
the heater core could be pluged or the heater control valve is stuck closed
It can do far worse, such as destroy your engine block. I wouldn't worry about your heater core, I would worry about your Engine.
Check fuse if the blower is not working. If it is then replace your heater core. if its not then replace your fan switch.