My suggestion: If you're going with Sears-- Get the installer's home
phone number and promise him that you will call him at 3 AM every
single night until he comes back and fixes all the problems.

I had them install my central A/C last summer, and despite letters,
emails, faxes and phone calls to both the salesman and the installer,
two minor problems (and $100 they owe me) have been ignored.

I spoke to my county's Department of Consumer Affairs today, after
filing a complaint. He said that Sears will eventually make good, but
they take a long time (longer since they let go much of their customer
service and legal staff after K-Mart bought them last year, he said).

On the positive side, the A/C works great, it's pretty quiet (two speed
blower that rarely operates on the higher, noisier, speed) and the
price was good, ignoring all the time I've put into trying to get them
to come back... and the time I spent cleaning up after the slightly
messy installer.