Rep Power: 0

Problem with an '05 Civic EX. After about 15-20 minutes the airflow stops from my vents, whether floor, dash, or defrost. The blower motor running in accordance with the dial settings, and the air is cold when set to cold and hot when set to hot. I can hear the blower running and can feel hot or cold air barely trickling out of the vents. Everything works fine at first but then the flow gradually dwindles to nothing. I've looked at this forum and around other places but can't find a similar issue.

Any thoughts on the problem?

 
Rep Power: 224

Sounds like the evaporator core is freezing up. Only happens when using the A/C? Check for low refrigerant and/or a blocked cabin air filter.

 
Rep Power: 0

Happens with A/C and heat. I put a new cabin filter in hoping that it would be an easy fix, but that wasn't the case. I was wondering if the blend door can completely close off so as to not let air flow to any outlets? I just can't figure why it works at first but then doesn't after a bit.