I have a 2007 kia spectra. My heater or ac will not blow air, I can feel heat, but it will not blow air

Likely to be Blend Door Actuators. Check out the video.

https://www.google.com/search?q=Kia+Spectra+AC+only+blows+cold+out+of+right+hand+vent

..

the relay or valve is stuck shut

Fix your car right away by clicking the link I attached
2007 Kia Spectra

check that the heater control (tap ) is being turned on by the controls.. Have an accredited ac mechanic check the ac system .

the temp rod got knocked off. if you look to the right by the gas pedal you should see something not attached.

If you can feel the a/c and heat but its just not blowing out of the vents like it should, more than likely you will need a new blower. Check the fuse for it first.
If the liquid is green its antifreeze and your heater core is probably leaking if its clear and looks like water it could just be condensation from the a/c.

It can be issue with blend door actuator or vacuum leak or loose vacuum hose connection.
I suggest you few help links.Click the link below and follow the troubleshooting.
-----
A/C Blows Warm? http://whoisbyme.blogspot.in/2012/06/2005-chrysler-pt-cruiser-ac-blows-warm.html

----------
A/C blows Cold From Defrost Vent Only? http://whoisbyme.blogspot.in/2012/06/2009-mercury-grand-marquis-ac-blows.html
-----------
A/c Blows Warm on driverside? http://whatisbyme.blogspot.in/2012/06/2007-kia-spectra-ac-blows-warm.html

-----------
A/C compressor clutch won't engage http://schematicsdiagram.blogspot.in/2012/04/2000-cadillac-deville-ac-compressor.html

---------------
Ford : A/C blows Warm? http://whoisbyme.blogspot.in/2012/06/2007-ford-freestyle-ac-blows-warm.html

----------
Thanks.

Heat and air conditioning are in separate systems. If you aren't getting heat, the first step is to check your coolant level. Low coolant can result in improper flow through the heater core. If you do have low coolant, be on the lookout for a coolant leak! If your coolant isn't low, then there is going to be an issue with circulation through the heater core. The heater core could be clogged in some way or another.1

CHECK THE COOLANT LEVEL IF THAT IS OK THAN I WOULD CHECK ON THE PASSENGER FLOORBOARD IN THE DASH THERE IS A ACTUATOR WITH A LEVER CONNECTED IT GETS KNOCKED SEE IF CAN BE REATTACHED AND THAT SHOULD TAKE CARE IT SEEN THIS MANY OF TIMES WORKING FOR KIA

The thermostat would be the place to start if you are sure its not the heater core. Heater core would have tell tale signs like antifreeze mist blowing in the vents or wet carpet soaked with anti freeze on the car floor, usually tword the passenger side. If its not the core, or the thermostat when you change it, then its probably in the hvac controls, but the core and the thermostat should be checked first. Also let the car warm up and feel both of the small hoses running into the firewall to the heater to see if they are hot. If not, one might be plugged. Hope this helps, Clay