Upon arrival tech found system cooling and reading 99 degrees on thermostat but temperature probe was reading 101 degrees and wall mount shutter fan running. Checked initial pressures and temperatures, suction pressure was high due to high indoor temp. Delt T was off but also due to high indoor temp. Tech inspected condenser coil and found it to be dirty but has no water access to clean. Tech suspects wall fan mounted directly beside supply open is causing system to not lower indoor temp. Turned wall fan off in panel and indoor temp began to slowly drop. Fan is designed to come on if indoor temp gets above 80 degrees. Tech used brush to clean trap while waiting for indoor temperature to come down. Tech had thermostat for wall fan drop down low enough to turn breaker back on and fan was no longer running. Thermostat tech dropped to 96 degrees. Tech is unsure what cause fan to come on. Recommends returning with water pack filled at shop to clean condenser and rechecking system when indoo