Commercial HVAC and Refrigeration in LA Since 1929

Los Angeles, CA business & property owners in need of  a trusted commercial HVAC contractor, whether they need AC 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.

RESSAC is large enough to service all of California, yet based right here in Los Angeles County.  We service all of Los Angeles, including downtown LA, San Fernando Valley (including Sheman Oaks, Encino, Van Nuys, Reseda, Northridge), Hollywood, West LA, Bel-Air, Brentwood, Griffith Park/Los Feliz and everywhere else.  We also service all the cities in and around Los Angeles County.

Don’t take our word for it, read our reviews below to learn more.

Local Reviews
for Los Angeles, CA

RESSAC Climate Control Rated 5.0 out of 5 stars based on 19 customer reviews

Great efficient work




Review of RESSAC Climate Control


Response from RESSAC Climate Control:

Thank you for the wonderful review of our ductwork job, Diana! We appreciate the feedback, and this should improve the capacity of your AC filters with less debris leaking into the ductwork.


Assistant Manager




Review of RESSAC Climate Control


Response from RESSAC Climate Control:

Thank you for the 5-star review of Franco's visit, Samantha!


Rock Star Service!




Review of RESSAC Climate Control


Response from RESSAC Climate Control:

Thank you so much for the wonderful review of Kevin's visit, Lea!


Great Service




Review of RESSAC Climate Control

fast and effieciant.


Response from RESSAC Climate Control:

Hi Johana, we'll pass your feedback back to our technician Franco, and thank you for the review!


Great Technician




Review of RESSAC Climate Control

Franco was very helpful. He let us know what was going on and was prompt in fixing our issue.


Response from RESSAC Climate Control:

Glad to hear Franco could get your air conditioner repaired promptly, Christopher. Thank you for the wonderful review!





Review of RESSAC Climate Control





Review of RESSAC Climate Control


Response from RESSAC Climate Control:

Morning Lea, thank you for the 5-star review for Kevin's visit last Friday. We're happy to see that the repairs for your AC and freezers were successful.


GREAT SERVICE




Review of RESSAC Climate Control

JOSE WAS AMAZING, HE FIXED ALL THE LEAKS, OUR TEAM APPRECIATE HIM! .


Response from RESSAC Climate Control:

Hi Devarius, good to hear the leak issues are resolved, and thank you for the awesome review!


On time, good work, friendly service




Review of RESSAC Climate Control

The invoice goes to our landlord, so I can't really speak to cost/price


Response from RESSAC Climate Control:

Hi Molly, thanks for taking the time to review our work, we appreciate the feedback!


Great Service




Review of RESSAC Climate Control

Excellent Service


Sergio J.

Sergio J.

Near South La Brea Ave, Los Angeles, CA 90016
Sergio J.

Sergio J.

Our customer in West Hills CA requested that their dampers be closed due to the nearby fire, causing poor air quality inside the store and making employees feel sick. Arrived and closed all dampers and economizers, ordering carbon filters for the site as well.

Near Fallbrook Ave, Los Angeles, CA 91307
Sergio J.

Sergio J.

Another customer in West Hills CA requested that their dampers be closed due to the nearby fire, causing poor air quality inside the store and making employees feel sick. Arrived and closed all dampers and economizers, ordering carbon filters for the site as well.

Near Fallbrook Ave, Los Angeles, CA 91307
Kevin S.

Kevin S.

Near Ventura Blvd, Los Angeles, CA 91364
Sergio J.

Sergio J.

Near De Longpre Ave, Los Angeles, CA 90028
Sergio J.

Sergio J.

Dispatched our LA County technician to a coffee shop to repair their split Carrier unit. The system needed a deep cleaning on the evaporator coil. Tech also flushed drain lines after cleaning. No more issues to report.

Near Sunset Blvd, Los Angeles, CA 90029
Los Angeles, CA - Dispatched our LA County technician to a coffee shop to repair their split  Carrier unit. The system needed a deep cleaning on the evaporator coil. Tech also flushed drain lines after cleaning. No more issues to report.
Sergio J.

Sergio J.

3rd Quarter HVAC Maintenance scheduled today for a coffee shop on Sunset Blvd in Los Angeles CA. All components checked and tested, AC filters replaced and heating components confirmed safe. PM complete.

Near Sunset Blvd, Los Angeles, CA 90029
Los Angeles, CA - 3rd Quarter HVAC Maintenance scheduled today for a coffee shop on Sunset Blvd in Los Angeles CA. All components checked and tested, AC filters replaced and heating components confirmed safe. PM complete.
Sergio J.

Sergio J.

Our commercial customer in Los Angeles CA requested an urgent filter change for one of their properties. After dating and replacing all A/C filters our technician found unit #4 with a failed blower motor, causing the air conditioner to ice up. Will quote necessary repairs to the customer.

Near Foothill Blvd, Los Angeles, CA 91342
Los Angeles, CA - Our commercial customer in Los Angeles CA requested an urgent filter change for one of their properties. After dating and replacing all A/C filters our technician found unit #4 with a failed blower motor, causing the air conditioner to ice up. Will quote necessary repairs to the customer.
Jovanny C.

Jovanny C.

Our customer in LA requested new light bulbs for their commercial freezer. Our technician arrived onsite with the necessary bulbs and found that the fittings would also need to be replaced. Will order necessary fittings and return.

Near Ventura Blvd, Los Angeles, CA 91604
Los Angeles, CA - Our customer in LA requested new light bulbs for their commercial freezer. Our technician arrived onsite with the necessary bulbs and found that the fittings would also need to be replaced. Will order necessary fittings and return.
Sergio J.

Sergio J.

Responded to a cooling complaint at a pet hotel in Los Angeles, CA. Upon arrival, our technician inspected their break room and cat area, finding a low voltage fuse burnt out on the Carrier air conditioner. Found that the wires had come loose and were rubbing together. Replaced and repaired the wiring, securing them to prevent damage again. Unit cycling on correctly, no more issues to report.

Near S Barrington Ave, Los Angeles, CA 90064
Los Angeles, CA - Responded to a cooling complaint at a pet hotel in Los Angeles, CA. Upon arrival, our technician inspected their break room and cat area, finding a low voltage fuse burnt out on the Carrier air conditioner. Found that the wires had come loose and were rubbing together. Replaced and repaired the wiring, securing them to prevent damage again. Unit cycling on correctly, no more issues to report.
Sergio J.

Sergio J.

Near Santa Monica Blvd, Los Angeles, CA 90067
Sergio J.

Sergio J.

Our commercial customer on Santa Monica Boulevard in LA, California, reported multiple water leaks over their men's section. Upon arrival our A/c technician found that the supply air vents had been closed. Hot air from the open front doors was interacting with the overly cold supply air ductwork causing moisture to form and leak. Our tech opened all the supply vents, adjusted the thermostat settings and confirmed the moisture dripping had subsided.

Near Santa Monica Blvd, Los Angeles, CA 90067
Los Angeles, CA - Our commercial customer on Santa Monica Boulevard in LA, California, reported multiple water leaks over their men's section. Upon arrival our A/c technician found that the supply air vents had been closed. Hot air from the open front doors was interacting with the overly cold supply air ductwork causing moisture to form and leak. Our tech opened all the supply vents, adjusted the thermostat settings and confirmed the moisture dripping had subsided.
Sergio J.

Sergio J.

A daycare in Los Angeles California requested their thermostat moved, as it was blocked by new furniture that needed to be in that place. Our HVAC technician arrived, disconnected and moved the thermostat 10 inches higher, and reconnected it. Tested all operations, stat and unit are operating normally, job complete.

Near Griffith Ave, Los Angeles, CA 90011
Los Angeles, CA - A daycare in Los Angeles California requested their thermostat moved, as it was blocked by new furniture that needed to be in that place. Our HVAC technician arrived, disconnected and moved the thermostat 10 inches higher, and reconnected it. Tested all operations, stat and unit are operating normally, job complete.
Sergio J.

Sergio J.

A clothing store on Beverly Boulevard in Los Angeles CA reported no AC in the men's area. Our technician arrived and found unit #2 with the controls switched off. Restarted controls, found VFD drive set to "hand mode", and wouldn't turn on when interrupted. Called tech support, walked through settings, rewired signal from relay to compressor and tested. Unit is working well again.

Near Beverly Blvd, Los Angeles, CA 90048
Los Angeles, CA - A clothing store on Beverly Boulevard in Los Angeles CA reported no AC in the men's area. Our technician arrived and found unit #2 with the controls switched off. Restarted controls, found VFD drive set to "hand mode", and wouldn't turn on when interrupted. Called tech support, walked through settings, rewired signal from relay to compressor and tested. Unit is working well again.
Jesus G.

Jesus G.

Our installation crew returned to make adjustments on the platform for a new commercial air conditioning unit, and complete connection of gas, electrical and drain lines. Installed new economizer. Completed all other installation tasks and started up new system, unit is cooling well and job complete.

Near N San Fernando Rd, Los Angeles, CA 90065
Jovanny C.

Jovanny C.

Dispatched our Los Angeles County HVAC technician to a coffee shop to investigate a unit making excessive noise. Upon arrival, our technician found the condensate line plugged and a dirty filter. Resolved both issues, ran and cycled system, draining normally now and no noise issue remaining.

Near Sunset Blvd, Los Angeles, CA 90029
Los Angeles, CA - Dispatched our Los Angeles County HVAC technician to a coffee shop to investigate a unit making excessive noise. Upon arrival, our technician found the condensate line plugged and a dirty filter. Resolved both issues, ran and cycled system, draining normally now and no noise issue remaining.
Sergio J.

Sergio J.

A cash loan shop in Los Angeles CA was scheduled for their summer AC maintenance today. All filters were changed, units inspected and minor service complete. No issues to report at this time, units running well.

Near S Hoover St, Los Angeles, CA 90006
Los Angeles, CA - A cash loan shop in Los Angeles CA was scheduled for their summer AC maintenance today. All filters were changed, units inspected and minor service complete. No issues to report at this time, units running well.
Sergio J.

Sergio J.

Returned to a commercial property on Melrose Avenue in LA to complete approved repairs on their air conditioner. After checking in with onsite management, our technician proceeded, defrosting the coil and relocating the thermostat to better read site temperatures. Confirmed system operational again and affected space comfortable.

Near Melrose Ave, Los Angeles, CA 90069
Los Angeles, CA - Returned to a commercial property on Melrose Avenue in LA to complete approved repairs on their air conditioner. After checking in with onsite management, our technician proceeded, defrosting the coil and relocating the thermostat to better read site temperatures. Confirmed system operational again and affected space comfortable.
Kevin S.

Kevin S.

Our LA county commercial HVAC technician returned to a property to complete approved repairs. The #1 Rheem unit needed a leak search and repair performed, and also needed it's low pressure switch, liquid line filter drier, condenser fan motor and capacitor replaced. Also needed to replace a pitted contactor on unit #2. After completing all approved work, the technician tested operations. Unit #1 tripping on low pressure, determined that the TXV will also need replacing. Unit #2 is up and running, will need to bid additional repairs for #1.

Near Woodman Ave, Los Angeles, CA 91331
Los Angeles, CA - Our LA county commercial HVAC technician returned to a property to complete approved repairs. The #1 Rheem unit needed a leak search and repair performed, and also needed it's low pressure switch, liquid line filter drier, condenser fan motor and capacitor replaced. Also needed to replace a pitted contactor on unit #2. After completing all approved work, the technician tested operations. Unit #1 tripping on low pressure, determined that the TXV will also need replacing. Unit #2 is up and running, will need to bid additional repairs for #1.
Sergio J.

Sergio J.

Dispatched our commercial HVAC technician to a clothing retailer in LA, who reported a water leak from the ceiling in their lobby. Upon arrival, our technician tracked the leak back to the #12 air conditioner that had a clogged drain line. Accessed drain trap and blew out lines, cleared out drain pan. Tested drainage, all leak issues resolved. Our tech also noted that the thermostat for unit #13 was not in an optimum location to read the supplied space temperatures correctly. Also found the same unit iced over. Shut down #13 to let it thaw, will quote troubleshooting of #13 and possible thermostat relocation to customer.

Near Melrose Ave, Los Angeles, CA 90069
Los Angeles, CA - Dispatched our commercial HVAC technician to a clothing retailer in LA, who reported a water leak from the ceiling in their lobby. Upon arrival, our technician tracked the leak back to the #12 air conditioner that had a clogged drain line. Accessed drain trap and blew out lines, cleared out drain pan. Tested drainage, all leak issues resolved. Our tech also noted that the thermostat for unit #13 was not in an optimum location to read the supplied space temperatures correctly. Also found the same unit iced over. Shut down #13 to let it thaw, will quote troubleshooting of #13 and possible thermostat relocation to customer.
Ryan C.

Ryan C.

A production company in Los Angeles California reported a water leak from one of their air conditioners. Our commercial HVAC technician traced the leak back to their #3 Mitsubishi mini-split with dirty filters, evaporator coil and a plugged drain line. Resolved all three issues, ran and tested system. Unit supplying 50 degree air and draining properly now.

Near De Longpre Ave, Los Angeles, CA 90028
Los Angeles, CA - A production company in Los Angeles California reported a water leak from one of their air conditioners. Our commercial HVAC technician traced the leak back to their #3 Mitsubishi mini-split with dirty filters, evaporator coil and a plugged drain line. Resolved all three issues, ran and tested system. Unit supplying 50 degree air and draining properly now.
Kevin S.

Kevin S.

A commercial customer in Arleta California reported that their AC was only blowing hot air. Upon arrival, our technician inspected both systems and found the Rheem air conditioner low on refrigerant with a failed condenser fan motor. Also found the #2 Trane unit with a pitted contactor. Quoting necessary repairs, unit #2 operational only.

Near Woodman Ave, Los Angeles, CA 91331
Los Angeles, CA - A commercial customer in Arleta California reported that their AC was only blowing hot air. Upon arrival, our technician inspected both systems and found the Rheem air conditioner low on refrigerant with a failed condenser fan motor. Also found the #2 Trane unit with a pitted contactor. Quoting necessary repairs, unit #2 operational only.
Sergio J.

Sergio J.

A commercial customer in LA requested coil washing for all their air conditioners, due to nearby construction that was kicking up dust. Our tech arrived and power washed all condenser coils, cycled and ran systems to confirm operations after completion. Units clean and running normally.

Near De Longpre Ave, Los Angeles, CA 90028
Los Angeles, CA - A commercial customer in LA requested coil washing for all their air conditioners, due to nearby construction that was kicking up dust. Our tech arrived and power washed all condenser coils, cycled and ran systems to confirm operations after completion. Units clean and running normally.
Sergio J.

Sergio J.

Dispatched our LA County air conditioning technician to a water leak at a commercial property. Tech found a drain line that needed to be cleared. Called EMS, had them reset unit #2 remotely as it wasn't cooling, unit had tripped on high head pressure to to water being off on water tower previous day. Water is on now, unit #2 back up and running. No more issues to report.

Near Vine St, Los Angeles, CA 90028
Los Angeles, CA - Dispatched our LA County air conditioning technician to a water leak at a commercial property. Tech found a drain line that needed to be cleared. Called EMS, had them reset unit #2 remotely as it wasn't cooling, unit had tripped on high head pressure to to water being off on water tower previous day. Water is on now, unit #2 back up and running. No more issues to report.
Ryan C.

Ryan C.

Approved HVAC repairs scheduled at a pet hotel in Los Angeles. Their commercial heat pump needed a thermostat relocated and the float switch installed. After running the new thermostat wire and installing the float switch, the technician tested the system and confirmed all operations were normal.

Near S Barrington Ave, Los Angeles, CA 90064
Los Angeles, CA - Approved HVAC repairs scheduled at a pet hotel in Los Angeles. Their commercial heat pump needed a thermostat relocated and the float switch installed. After running the new thermostat wire and installing the float switch, the technician tested the system and confirmed all operations were normal.