Heater working ok on car but no heat output on downward vents,justs blows cold air all of the time the fan is on?

Russ, January 2010

somtimes it gets warm,then i bleed the system as been told then its warm then its cold do you think there still a lot of air in the system.

bill longstaff., November 2010

Hi,
It may be obvious and you've probably checked it but sometimes if the coolant level is too low then it will only blow out cold air, or the air tube which directs the hot air from the heater matrix to the feet position may have come off. This would be a tricky one as its probably up under the dash so a bit of a swine to get at.
Best of luck,

Daryl, January 2010