Irvine, CA business & property owners in need of HVAC or refrigeration design, installation, maintenance, monitoring, repair or retrofits have called RESSAC first for the past 90 years. That’s because we are a third-generation, family owned company that prides itself in exceptional customer support, timely response and quality service. Don’t take our word for it, read our reviews below to learn more.

Local Reviews
for Irvine, CA


Doug W.

Doug W.

A business owner in Irvine California reported that the air wasn't working in their office. Dispatched our commercial HVAC tech to the site to inspect. Our technician found the Carrier system frozen at the evaporator coil. After defrosting the coil our tech found the blower section insulation had fallen off into the cabinet. Replaced it, also increased the blower speed. Continued troubleshooting and found the unit low on charge, pinpointed leak and repaired. Unit now supply 55 degree air and no longer freezing.

Near Hale Ave, Irvine, CA 92606
Irvine, CA - A business owner in Irvine California reported that the air wasn't working in their office. Dispatched our commercial HVAC tech to the site to inspect. Our technician found the Carrier system frozen at the evaporator coil. After defrosting the coil our tech found the blower section insulation had fallen off into the cabinet. Replaced it, also increased the blower speed. Continued troubleshooting and found the unit low on charge, pinpointed leak and repaired. Unit now supply 55 degree air and no longer freezing.
Sergio J.

Sergio J.

A restaurant in Irvine CA reported a water leak over their expo area. Upon arrival, checked the AC units around the leak area, found units dry and not leaking. Did find multiple areas around the roof that are cracked and need to be looked at, and repaired, by a roofer. Updated onsite management and main office.

Near Main Street, Irvine, CA 92614
Irvine, CA - A restaurant in Irvine CA reported a water leak over their expo area. Upon arrival, checked the AC units around the leak area, found units dry and not leaking. Did find multiple areas around the roof that are cracked and need to be looked at, and repaired, by a roofer. Updated onsite management and main office.
Sergio J.

Sergio J.

Responded to an urgent cooling request regarding make-up air units and rooftop units at a restaurant in Irvine California. Found the belts had given out on two of the MUA systems, and filters were badly clogged on Trane unit #5. Will need to source parts and quote repairs to customer.

Near Main Street, Irvine, CA 92614
Irvine, CA - Responded to an urgent cooling request regarding make-up air units and rooftop units at a restaurant in Irvine California. Found the belts had given out on two of the MUA systems, and filters were badly clogged on Trane unit #5. Will need to source parts and quote repairs to customer.
Sergio J.

Sergio J.

Our HVAC technician returned to a printing facility in Irvine to inspect their commercial air conditioner. The tech found one of the units with improper thermostat settings, set to run only 1 day per week, which the tech was able to resolve. He also found a second air conditioner improperly wired. Rewired to the thermostat. re-configured and tested. System back up and running again. Note that one other unit is already quoted for existing repairs, and is down.

Near Hale Ave, Irvine, CA 92606
Irvine, CA - Our HVAC technician returned to a printing facility in Irvine to inspect their commercial air conditioner. The tech found one of the units with improper thermostat settings, set to run only 1 day per week, which the tech was able to resolve. He also found a second air conditioner improperly wired. Rewired to the thermostat. re-configured and tested. System back up and running again. Note that one other unit is already quoted for existing repairs, and is down.
Javier G.

Javier G.

Commercial EMS installation quality check at a clothing retailer in Irvine, California. Confirmed HVAC unit startup on their was complete and systems functional. Will need to return after lighting contractor completes their phase of project.

Near Fortune Dr, Irvine, CA 92618
Irvine, CA - Commercial EMS installation quality check at a clothing retailer in Irvine, California. Confirmed HVAC unit startup on their  was complete and systems functional. Will need to return after lighting contractor completes their phase of project.
Jeremy  H.

Jeremy H.

Near Hale Ave, Irvine, CA 92606
Fabian R.

Fabian R.

Irvine, CA, commercial HVAC technician dispatched to a specialty import store for spring maintenance. The tech changed filters, belts, tested pressures and inspected all equipment. Found Lennox units #1 and #2 low on refrigerant. Will quote for repairs and send to customer.

Near Jamboree Rd, Irvine, CA 92602
Irvine, CA - Irvine, CA, commercial HVAC technician dispatched to a specialty import store for spring maintenance. The tech changed filters, belts, tested pressures and inspected all equipment. Found Lennox units #1 and #2 low on refrigerant. Will quote for repairs and send to customer.