A practical HVAC checklist before an extended trip, including thermostat settings, filters, drains, power, monitoring and avoiding unnecessary shutdown risks.
Turning the HVAC system completely off during an extended absence is not always the best choice. Temperature and humidity control can protect the home as well as provide comfort.
The appropriate setback depends on season, climate, building conditions, plumbing risk, pets or plants and any humidity-sensitive contents.
Before leaving, make sure the system is in normal operating condition rather than discovering an existing problem after departure.
Use a reasonable energy-saving setting that still protects the building from excessive heat, humidity or cold.
Do not leave for an extended period with a filter already heavily loaded.
Check for existing condensate leakage or pump problems before cooling-season travel.
Remote thermostat alerts can provide useful notice of abnormal indoor temperature if configured correctly.
Make sure landscaping or temporary items are not blocking the unit.
For a long absence, have a local person who can access the home if a temperature or water alarm occurs.
Filters, thermostat settings, visible outdoor-unit clearance, unusual noise, water and changes in comfort are all useful things for a homeowner to monitor. Catching a change early can prevent a minor condition from becoming a larger service problem.
Electrical testing, refrigerant evaluation, combustion analysis, internal equipment cleaning, airflow measurement and safety-control checks should be performed by qualified personnel using the appropriate procedures and instruments.
Use symptom-based guides when the system is already malfunctioning.
Understand the components being maintained.
Learn why filters and restrictions affect system performance.
Use Central HVAC's homeowner planning and evaluation tools.
If you notice repeated cycling, poor comfort, water, ice, unusual odors, abnormal noise or a sudden change in operating performance, maintenance alone may not be the answer. The system should be diagnosed.
Understand what the maintenance task is protecting.
Identify common service parts and components.