2003 Honda Civic Q&A
2003 Honda Civic Question: There is NO air at all coming from vents when heater or a/c is turned on.
Does the green indicator on the a/c switch light up? does the blower motor have power going to it PCM controls the compressor , if it doesn't see the blower motor (inside fan)come on it won't let the compressor engage.Check blower motor relay. SOME are integrated into the multi-plex of the drivers side fuse box - ziptie12