HVAC and Refrigeration Maintenance Checklist

What a good one includes

• A dedicated safety and lockout/tagout section at the very top to ensure power is safely disconnected before any work begins.
• A logical workflow organized by physical location—such as outdoor condenser, indoor air handler, and thermostat—to minimize wasted movement.
• Specific fields for recording electrical measurements, including compressor run amps, capacitor microfarads, and line voltage under load.
• A refrigeration circuit section for logging superheat, subcooling, suction pressure, and liquid pressure readings against manufacturer specifications.
• Clear prompts for mechanical maintenance, such as checking belt tension, cleaning condensate drains, and inspecting contactor points for pitting.
• A formal sign-off block for both the technician and the client to verify that the work was completed and any issues were noted.

Common mistakes to avoid

• Using a one-size-fits-all checklist that mixes up commercial refrigeration and residential AC, leading technicians to skip irrelevant steps or miss system-specific requirements.
• Failing to include spaces for recording exact numeric measurements, which prevents you from tracking system degradation over time or proving your work to a skeptical customer.
• Organizing the checklist randomly instead of following the natural physical path of a service call, which causes technicians to waste time running back and forth.
• Leaving out explicit safety checkpoints like gas leak checks or carbon monoxide testing, exposing your business to major liability risks.

Frequently asked questions