"Please call a HVAC repair guy (or gal). Your system needs repair. "

And ask them if they are licensed and insured.
And when the techs get there, ask to see the proof.

There are people out there, Stormin Mormin for example, who will take
your money and convert your house into a firetrap.

http://groups.google.com/group/alt.h...403229ce15893c