Responded to an emergency air conditioning request from a mobile phone provider in La Habra California. Our technician found the thermostats for both commercial York units were blank. Traced issue back to a tripped duct smoke detector. Reset the detector, units restarted but detector swiftly tripped again. Continued troubleshooting and diagnosed a faulty ECM blower motor on unit #1. Reset unit #2 for partial cooling and will quote necessary repairs for unit #1.
A commercial customer in La Habra CA reported that their office air conditioner was not working. EMS showed the unit had multiple faults. Upon arrival, our technician troubleshooted the #5 Lennox unit and found it off on high head pressure with a loose connection on the condenser fan motor relay. Repaired, reset and ran unit. No more issues to report, confirmed site is back to normal with EMS.
Commercial A/C tech was dispatched for approved quoted repairs at a check cashing place in La Habra, California. Tech replaced an old, faulty t-stat with a new Honeywell thermostat. Stat was programmed to the store's preferences, site cool and working well.
Performed preventative maintenance on 5 Lennox units. Changed filters, checked amperage, and tested safeties. Measured refrigerant levels and cleaned out blower housing. Belt tension and condition is fine.