Inspect piping for evidence of leaks and vibration. If leaks are not able to be stopped or corrected, report leak status to supervisor.
Inspect all wiring for deterioration, and tighten electrical contacts. Check for corrosion, clean, prime, and paint as necessary.
Check mounting bolts and tighten if needed.
Check crankcase heater.
Check fan for vibration or excessive noise. Lubricate fan and motor if required.
Check refrigerant levels, recharge if necessary. Check for leaks if loss of refrigerant is detected, using halide leak detector and soap bubbles. If leaks are not able to be stopped or corrected, report leak status to supervisor. Consult the Material Safety Data Sheets (MSDS) for disposal requirements.
Check temperature drop across condensing coil.
Clean air intake and screens; change filters as necessary.
Brush or pressure wash coil surfaces. Straighten fins with
fin comb.
Check that reversing valve is energized in the "heat" mode and de-energized in the "cool" mode. Replace defective valves.
Check all electrical connections and fused disconnect switches.
Check all controls, indoor and outdoor thermostats, timers, and control delays, especially for units with electric supplemental heaters. Repair or replace as necessary.
Check oil if compressor is equipped with a sight glass.
Clean surrounding area, record results and findings and report any needed repairs or operational adjustments.

Obtain and review manufacturer's instructions. Follow manufacturer’s instructions or procedures if different to these instructions or procedures.
De-energize, lockout, and tag the electrical circuits.
Comply with the latest provisions of the Clean Air Act and Environmental Protection Agency (EPA) regulations as they apply to protection of stratospheric ozone.
No intentional venting of refrigerants is permitted. During the servicing, maintenance, and repair of refrigeration equipment, the refrigerant must be recovered.
Whenever refrigerant is added or removed from equipment
Recover, recycle, or reclaim the refrigerant as appropriate
If disposal of the equipment item is required, follow regulations concerning removal of refrigerants and disposal of the appliance
If materials containing refrigerants are discarded, comply with EPA regulations as applicable.
Refrigerant oils to be removed for disposal must be analyzed for hazardous waste and handled accordingly.
Closely follow all safety procedures described in the Material Safety Data Sheet (MSDS) for the refrigerant and all labels on refrigerant containers.

Standard and Phillips head screw drivers-various sizes; Pliers-vise grip (2), slipjoint, needlenose, diagonal; cutting pliers, side cutters; Ball peen hammer; Hack saw and spare blades; 3/8' drive socket set and ratchet; Small set of Allen wrenches; Assorted center punches, drift punches, and steel chisel; 12' measuring tape; Crescent wrenches 4" to 8"; Open and box end wrenches ¼" to ¾"; File; Pipe wrenches to 14"; Small level and square; Pocket knife; Flashlights; Grease guns and oilers; Wire brush; Extension cord and inspection lights; Various cleaning tools - brushes, scrapers, etc; Emery cloth.
Refrigeration – gauges; Leak detector-electronic or halogen; Pocket thermometer; Clamp on meter (volt - ohm - amp meter); Flaring tool; Tubing cutters; Packing kit and packing; Crescent wrenches to 14"
Lubricants. Consult the MSDS for hazardous ingredients and proper personal protective equipment (PPE).
Cleaning materials. Consult the MSDS for hazardous ingredients and proper PPE.
Fin comb
Vacuum or pressure washer.
Self sealing quick disconnect refrigerant hose fittings
Refrigerant recovery/recycle unit
EPA/DOT approved refrigerant storage tanks.
Approved Refrigerant
Electronic leak detector.
Safety goggles.
Gloves.
Standard Electrical Power Outlet