If you included the kind of car you have,I could be more specific but all cars have a vacuum canister under the hood. some are round plastic and some are a tin can and most are black. There shuold be a vacuum line going from the intake to one end and a vacuum line out of the other that supplies vacuum to the interior of the car, There should be a one way valve in the canister or the line from the intake. This valve is not functioning and loosing vacuum in the resirvoir. If it is in the resirvoir which most are, replace the resirvoir.
A/C and Heater duct controls are often operated by vacuum chambers with spring return, under acceleration...wide open throttle...manifold vacuum goes to zero!
I have the same problem, and looking for answers. Please help!
Your AC might be blowing out of dash vents on the windscreen as you might have turned the knob to that particular mode. It is also possible that the vent mechanism might be out of order or broken.
The heater core is leaking coolant.
Low speed relay bad Blower fan resistor Defective winding in blower motor
If central air conditioner turns on but is not blowing through the vents, check the filter. If it is dirty, change it. Change the thermostat into cool, this will defrost the air conditioner.
Call someone to repair the outdoor unit and the vents will blow cool air.
If the air vents of the Chevy trailblazer 2004 are not blowing air, have the fuel pump checked.
you may just be low on freon
your cabin filter might be dirty
When there is a problem in the vent system it defaults to defrost setting. Check the doors & vac supply
Check for a vacuum leak -sounds like it is starving for vacuum and reverts to the default position
The most common cause of an air conditioner not blowing air is a plugged filter. Be sure your filter is clean.
2003 crown vic air conditioning vent dont blow
on my 92 explorer i had the same problem . i just bought a new blower fan for it. the fan was in a metal casing attached to the firewall on passenger side by the hood hinge . hope this helped.
55 degrees to 60 degrees
There could be a number of problems. Dirty ducts or heat exchanger. Wrong speed on the fan, or turning the wrong way. Plugged filters or vents.
There are 2 filters you access in the glove box. If they are dirty you get almost no air. Clean or replace them and be amazed at the difference
You may need to have your AC charged
No power, no air! Simple
Jammed blend door or blockage in the ducts if you mean to say air isn't blowing through at all.
this one is easy your switch the controls the vents is not working there is a flap the closes the defrost vents so that it goes through the other vents or there is a vacumn line that is controlled by the switch, and its leaking. The vacumn line is usually on the engine side of the firewall. It is a very small plastic tube comming out of the middle of the firewall at the top and it connects to a junction with other vacumn lines. See if any of them are disconnected.
If the vents stop blowing when gas is applied, it is likely a vacuum problem. The vent system is controlled by vacuum, so when the engine is under load, there isn't enough vacuum to run the vents. How you test this is when the problem occurs, the fan will still be blowing air, however the flow of air will be out your window defrost vents at the top front of the dash. On a 1995 vehicle, it's likely just some of your vacuum lines are broken, and need replaced or repaired.