Key devices such as the refrigerant identifier, electronic leak detection tool and temperature gun all need to be tested and adjustments made to ensure they are performing to manufacturer specifications.
Refrigerant Recovery/Recycle & Charging Station
This all-important tool needs a complete pre-season inspection.
Areas of concentration include changing the oil in the vacuum pump, calibrating the scales and gauges, inspecting all hoses for cracks and splits, checking the gauges for leaks, purging the storage tanks of air, replacing particulate and oil filters, and examining the O-rings at the service couplers for wear.
Recovery Reservoir Oil Check
To avoid inaccurate measurements by the recovery reservoir, you should also check it for "leftover" oil from the previous season.
A deep vacuum test is also highly recommended. If your unit can't achieve a deep vacuum, you won't be able to secure a proper charge of the refrigerant and oil following a repair.
An improper refrigerant charge can lead to premature component failures, particularly with compressors.
Each technician needs to be certified by the Environmental Protection Agency to handle refrigerants.
Testing is involved to obtain the certification.
Oil and O-Rings
Most A/C system oils and lubricants have an expiration date. Survey your inventory and replace as needed.
Another good supply check is O-rings. They should be inspected for cracks and splitting.
Consider Upgrading Your Tool Box
Unfortunately, spanner wrenches won't work on newer-style compressor clutches. If you haven't invested yet in a compressor turning tool, now's the time.
You might also want to consider adding a tool such as Delphi's new A/C Analyzer to your tool box. This unique device measures eight key air-conditioning system areas to help take the guesswork out of servicing today's A/C systems.
The hand-held, wireless device links to any Bluetooth¨-equipped PDA and services R-134a systems.