1. Home
  2. Home & Garden
  3. Home Repair

Central Air Conditioning Unit and Heat Pump Maintenance

By Bob Formisano, About.com

7 of 7

Power On Sequence


To power the unit back on after it has been shut off more than three hours, proceed as follows:
  • Switch the thermostat inside your house to the "off " position.
  • Restore power at the outside electrical disconnect box and service panel.
  • Turn the thermostat to "cool" to power the unit back on.

Explore Home Repair

About.com Special Features

Home Allergy Center

Banish mess, reduce allergens, and maintain a clean, healthy home. More >

Home Improvements Made Easy

Inspirational ideas and expert tips to help you pull off your next DIY project. More >

  1. Home
  2. Home & Garden
  3. Home Repair

©2009 About.com, a part of The New York Times Company.

All rights reserved.