Our La Habra California area technician troubleshooted a Lennox system that was not shutting off when smoke detectors tripped. Determined that the VFD's blue circuit board was set to test mode. Corrected programming, retested detectors. Confirmed unit now shuts off correctly if smoke detectors trip. Job complete.
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.