-Performed CMA Full Service on 3 rooftop package units. -System 1 (Front): Thermostat setting not satisfied upon arrival. Blower motor belt loose and noisy in operation. Tightened belt as appropriate. Observed blower contactor erratic operation when jumping R circuit to blower circuit. Found 24v from transformer but little to no voltage at thermostat connections to control board. Suspect problems with control board. Recommend demand tech to further diagnose system. -System 2 (middle): Observed fan running all day but no operation of compressors. Observed & removed wasp nest across high voltage fuses. Observed 24v between R and common thermostat wire on control board but no voltage on Y circuit even though thermostat should be calling. Jumping R to Y causes transformer breaker to trip. Recommend demand tech to further diagnose system. -Summary: System 3 operating correctly at this time. Demand tech being dispatched to identify problems with systems 1 & 2.