Air from airconditioner does not blow through to the windscreen vents

SOURCE: Heater blowing cold air.

replace thermostat its clugged,and only allows very little water to go through

SOURCE: 1986 VW Golf heater blows cold air

The heater in your car depends upon a flow of hot coolant going through the heater core in order to get hot air into the car. If the heater core is partially plugged, it will restrict the flow. If you have a head gasket that is putting exhaust into the cooling system, it will eventually get into the heater core. When this happens there is no coolant in the heater core to make the air warm. If the water pump vanes have corroded away the result will be very poor coolant circulation causing the heater to not blow hot air. If your car is equipped with a heater control valve that is not functioning properly, the coolant flow will be restricted. One or a combination of these factors is likely the culprit in your case.
if the car is not overheating, the thermostat is working fine.... replace or flush the heater core multiple times to try and eliminate sediment build-up.

SOURCE: 2000 jetta doesn't blow cool or cold air out,of the a/c.

yes, after 9 years it needs to be recharged. Have a shop with a good reputation do it. Dont go cheap. It should hooked up to a machine so you can see how much leaked out,and test for leaks. shouldnt be more than $100

SOURCE: my heat not workini but blow cold air where is

Has the car been changed coolant since it was bought? If it is time to change, let do a flush through a heater core. There are 2 coolant hoses going thru a fire wall. One for coolant in and one for coolant out. Heater only works if coolant is flowing through the heater core. Therefore, there are one or both following cases contributes to the problem: 1-If the valve control coolant flow gets stuck, then it always closes  so there is no heat. 2-If the valve is working, but the heater core gets clogged up, then there is no heat.

dj_relly999

• 4070 Answers
• Posted on Feb 09, 2010

SOURCE: Fan is blowing cold air only

good day, you may have some heating core issues, anti freeze leakage, have it checked. hope this helps, have a nice day