To prevent the undue expense of a service call, always check the following items before requesting service:

1. Circuit breakers and disconnect switches: Make sure all breakers and switches are fully in the "ON" position. It is best to turn them "off" and then "on" again to be certain they are actually "on". There is an A/C disconnect switch located on the outside wall adjacent to the condensing unit. The circuit breakers controlling the units are located in the main electrical panel and should be labeled A/C. The furnace disconnect switch, usually located in the attic, looks like an ordinary light switch but should be labeled "FURNACE."


2. Make sure the utility company has not interrupted electrical or gas service for any reason.


3. Filters: Check for clean filters. Excessively dirty filters restrict airflow and can damage your HVAC equipment. We recommend that the filters be changed at least twice a year.


4. Registers and Grilles: Make sure that your supply registers are open in the area that is not cooling or heating properly. In no event should the registers be set so that more than 25% of the total system airflow is cut off. Care should be taken to be certain that furniture or other items do not block the flow of air to or from the registers and grilles.


5. Thermostats: The thermostat must be set in the proper mode (either heating or cooling) and the setting must be below the indoor temperature for cooling or above the indoor temperature for heating in order for the system to operate.