Brennan G Today I visited for system maintenances. All systems except 4 and 5 are operating normally at this time. I replaced all of the air filters throughout the home. Verified electrical components and refrigerant levels are within range. I discovered system #3 had a weak capacitor. We recommend it is replaced. I discovered system #4 is low on refrigerant and will need further repairs. Due to the age repairs are not recommended. I discovered system #5 has a weak capacitor and the air handler is contaminated with biological growth. Due to age repairs are not recommended. Helen plans to have us return in the spring to replace capacitor #3 and provide estimates for the replacement of systems #4 and #5. We also discussed the replacement of system #4s ducts as they are easily accessed and in poor condition. We discussed the duct sanitation of the downstairs duct system as for they are not accessible. We replaced the thermostat for system #5 today.