The tune-up will also cover these:
- Electrical connection assessment
- Voltage and current assessment
- Pilot light or ignition check for furnaces
- Evaporator/condenser coil cleaning for heat pumps
- Check for air, gas, and refrigerant leaks
Loose wiring is a fire hazard, but the technician will tighten connections where necessary. It also goes without saying that refrigerant leaks and carbon monoxide leaks will endanger either you or the environment.
Addressing air leaks in the ductwork will need a separate appointment, but you’ll at least know about the problem sooner than if you didn’t get maintenance.
As a part of maintenance, the technician will fix out-of-balance parts, especially the fan blades; clean out the condensate drain line in heat pumps and furnaces; and test the safety controls.
In the end, the technician will see that the system blows out hot or cold air at the right pressure. He or she should lay out what happened and what might need doing in the future via a detailed written report.