Upon arrival I began the AC tune up. I found the static pressure was failing at .7 when it is rated for a max of .5 but the manufacturer wants it at 80% of the max which would be .4. I checked the cooling Delta T level which was good at 18 degrees. The blower wheel is caking up with dirt. The running amps on the blower motor are a little high at 9 running amps. The capacitor on the blower was at 100%. The dual run capacitor on the outdoor condenser unit was at 100% as well. Customer asked me not to check the refrigerant levels. The running amps on the fan and compressor were within limits. Customer opted not to have a field supervisor out to find a solution to the static failure issue.