A restaurant in Santa Clara CA reported that one of their air conditioners wasn't cooling. Upon arrival, our technician troubleshooted the Lennox split system and found an issue with the wiring o the reversing valve, causing the system to run on heat mode only. Resolved the wiring issue and fixed the settings on the thermostat. Unit started up in cooling mode again, no more issues to report.
Dispatched our Santa Clara area AC tech to a restaurant to inspect a sensor issue. The technician inspected the #1 zone sensor as well as the thermostat which was blank. Troubleshoot with EMS, confirmed replacement of the sensor was needed. After replacing sensor continued troubleshooting, finding the economizer module had failed. Bypassed module to provide side with cooling. Will quote to return and replace module.
Major maintenance scheduled at a national clothing retailer in Santa Clara California. Our technician completed all PM checklist items, including coil washing and changing out all old filters with new current dated filters. All units are running well, no issues to quote. Checked out with store manager, job complete.
Our EMS technician arrived and a health club in Santa Clara, California, for a commercial HVAC controls survey. Voltage and phases of equipment obtained, full pre-installation checklist completed, economizer info obtained. Will return to inspect two new units customer is installing once work is complete.
RESSAC a/c technician arrived at a commercial retail store to perform a leak search and repair on a Trane package unit. The tech repaired the leak and replaced the line drier. The unit was restored to full capacity and was now cooling again.
Had previously quoted issues found on preventative maintenance for commercial automotive dealer in the Bay Area. Received approval to return and install two infrared gas heaters manufactured by Dayton to replace those which were no longer heating. These heaters will provide heat to service garage. Also repaired flue pipe connected to exhaust fan above parking garage. High ceiling required scissor lift to complete work.