Why does my car AC vent blow hot air when driving even?
Hot water is always present when the motor is running. There will always be some heat in the radiator/heat exchanger. When the heat is on there is hot water flowing but even off there will be some conduction in the water. If you are feel a significant amount of heat and it outside vent is closed, you might have a leaky heating valve.
Are there any cars that do not have AC vents?
Most cars do not have AC vents, only climate control vents. Which means that they blow what ever air is selected. There are exceptions. I had a 1980 Ferrari that did not come stock with AC.
What causes hot air to flow in the passenger compartment?
The ram air flow from vehicle speed would cause hot air to flow in the passenger compartment at all times, Even with the blower motor commanded OFF. On the system described, one open, damaged or disconnected vacuum line coupling (usually located at the main HVAC supply line at the firewall) would cause the complaint described.
Where does the hot air from the AC come from?
Hot air comes from the vents when the AC is off due to ducting “gains” (heat we are talking about). Your HVAC ducts are likely a big snake across warm components, around a heat exchanger and very close to it.
Why is my car a / C blowing hot air out of the vent?
Your car’s A/C system is one that operates a little differently than you might think. Instead of actually creating cool air, it instead removes the heat and moisture from the air inside of your car, leaving you with cooler feeling air.
Most cars do not have AC vents, only climate control vents. Which means that they blow what ever air is selected. There are exceptions. I had a 1980 Ferrari that did not come stock with AC.
Hot air comes from the vents when the AC is off due to ducting “gains” (heat we are talking about). Your HVAC ducts are likely a big snake across warm components, around a heat exchanger and very close to it.
The ram air flow from vehicle speed would cause hot air to flow in the passenger compartment at all times, Even with the blower motor commanded OFF. On the system described, one open, damaged or disconnected vacuum line coupling (usually located at the main HVAC supply line at the firewall) would cause the complaint described.
Why does my car heat stop working in the winter?
I have a 2008 S550 that I recently bought, this was the first time I drove it in the winter cold weather, the heat was always working but after driving to the store I parked the car in the parking lot and the heat suddenly stop working, it was only blowing cold air.
What to do if your Mercedes heater blower is not working?
My blower motor was fixed in with 3 posidrive screws. Had to use a stubby screwdriver on one of them too due to a serious lack of room. Check first before just pulling it out Rooty.
Why is my Mercedes W211 not blowing hot air?
Heater is not blowing hot air on Mercedes W211, W219 / Problem solved! Replacing valve W211 – YouTube Heater is not blowing hot air on Mercedes W211, W219 / Problem solved! Replacing valve W211 If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations.
Why is my C230 Komp heater not working?
C230 Komp blower has been off and on since last year, and only working on 5 when it did. Worked fine over summer. Now that it is cold, it stopped for the most part. Read the threads here….pulled cover off from under passenger foot well and access the blower motor and wiring. Wiggled wires and checked connections and that did the trick.
Where is the fan on a 1999 V220 Ambiente?
Click to expand… I have a 1999 V220 Ambiente with same problem, fan sometimes works and comes on over speed bumps. I have located the motor, visible behind left hand dash vent, but can’t get at it to remove. Even when working it’s not powerful so needs replacing or new brushes, just need to remove it.