Demand call for upstairs gas system from 2023 not cooling, uses air filter size 16*25*4. We didn’t install this system but still has a 10 year part warranty on it. Customer stated she had another company come out to check her systems out but wasn’t too pleased with the service. During my visual inspection I noticed the blower running but the outdoor unit wasn’t turning on. After further investigation I found that the contactor was disconnected. I brought it up to the customers attention and now she’s wondering if the other company came out and disconnected it on purpose. After connecting the wires on the contactor the system turned on and was cooling her upstairs down. I checked temperatures and electrical connections and components to make sure system was operating properly and changed the air filter for her today. The system does have a lot of dirt buildup in the ductwork but customer doesn’t have the finances at this time to get her ductwork cleaned. System is running upon depa