The subject of HVAC units can be a bit overwhelming to most homeowners.This is because there is a lot that so much goes into these things. Know what type of system before looking for a repair person. This will enable you can give your new contractor all the information they need. If your HVAC doesn’t seem to be working properly, check out each room in your house before calling for assistance. This will help the repairman determine where the problem is. Be sure to regularly clean debris from external condenser units regularly.You don’t know when things are going to pile…