The guides on this site are general information for homeowners. They aren't a substitute for your equipment manufacturer's instructions, local codes, or a licensed HVAC technician.
- HVAC equipment uses line voltage, stored electrical charge, pressurized refrigerant and, in many homes, natural gas or propane. Each can cause injury, fire or death if handled incorrectly.
- Always turn off power at the breaker or disconnect and verify it's off with a meter before working on equipment.
- In the United States, work that opens a refrigerant circuit is regulated under EPA Section 608. Gas work may require a permit or a license where you live.
- Doing your own work may affect your equipment warranty. Check the terms before you start.
You're responsible for your own safety and for deciding whether a job is within your ability. When in doubt, call a pro.