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


Benjamin C.

Benjamin C.

Dispatched our Los Angeles County air conditioning technician to a store to complete approved repairs. Their VAV unit needed the parameters reset on its VFD ABB drive. While troubleshooting, he also greased the motor wheel bearings as they were dry. Removed line and loan wires from VFD drive and cleaned ports. Reinstalled, tightened connections. Unit back online and VFD parameters corrected.

Near Beverly Blvd, Los Angeles, CA 90048
Los Angeles, CA - Dispatched our Los Angeles County air conditioning technician to a store to complete approved repairs. Their VAV unit needed the parameters reset on its VFD ABB drive. While troubleshooting, he also greased the motor wheel bearings as they were dry. Removed line and loan wires from VFD drive and cleaned ports. Reinstalled, tightened connections. Unit back online and VFD parameters corrected.
Jovanny C.

Jovanny C.

A pet hotel in Los Angeles, CA, reported that their heater wasn't working properly. Upon arrival, our air conditioning technician inspect the system was unable to get roof access despite scheduling, will return in AM to readdress.

Near S Barrington Ave, Los Angeles, CA 90064
Jovanny C.

Jovanny C.

Dispatched our Los Angeles CA technician to a commercial property to troubleshoot an AC unit that was short cycling. After troubleshooting, determined that the Carrier unit had a failed defrost timer that will need to be replaced. Will source and return with part.

Near N Highland Ave, Los Angeles, CA 90038
Los Angeles, CA - Dispatched our Los Angeles CA technician to a commercial property to troubleshoot an AC unit that was short cycling. After troubleshooting, determined that the Carrier unit had a failed defrost timer that will need to be replaced. Will source and return with part.
Doug W.

Doug W.

Our LA County A/C technician found a Trane system with corroded connections between the wiring harness and the circuit board. Cleaned the connections and reprogrammed the thermostat. Circuit board and wiring will need to be replaced, unit working temporarily.

Near Griffith Ave, Los Angeles, CA 90011
Jovanny C.

Jovanny C.

A health center in Granada Hills, CA, was scheduled for approved A/C repairs today. Our technician replaced the economizer screen on their commercial ICP unit, and wash all rooftop condenser coils for all units. Units working well after repairs, job complete.

Near Chatsworth St, Los Angeles, CA 91344
Los Angeles, CA - A health center in Granada Hills, CA, was scheduled for approved A/C repairs today. Our technician replaced the economizer screen on their commercial ICP unit, and wash all rooftop condenser coils for all units. Units working well after repairs, job complete.
Jovanny C.

Jovanny C.

Near Abbot Kinney Blvd, Los Angeles, CA 90291
Jovanny C.

Jovanny C.

Near De Longpre Ave, Los Angeles, CA 90028
Benjamin C.

Benjamin C.

A retailer in Los Angeles CA requested emergency AC service due to a water leak in their store. Our technician found the commercial Carrier unit with a plugged drain line and the 1st stage circuit icing up.

Near Beverly Blvd, Los Angeles, CA 90048
Jose G.

Jose G.

Dispatched our local technician to address a communication issue at our commercial customer in Los Angeles CA. Upon arrival our tech found no power to the thermostat due to a fried contactor and two blown fuses. Repairs will be quoted to the customer.

Near W Pico Blvd, Los Angeles, CA 90019
Los Angeles, CA - Dispatched our local technician to address a communication issue at our commercial customer in Los Angeles CA. Upon arrival our tech found no power to the thermostat due to a fried contactor and two blown fuses. Repairs will be quoted to the customer.
Sergio J.

Sergio J.

Near Woodman Ave, Los Angeles, CA 91331
Sergio J.

Sergio J.

Arrived at a customer's service room in LA to investigate a no cooling issue. Found the #2 thermostat dislodged from the subase on the wall. Re-wired thermostat, unit came back online. Will need to power wash condenser coils as they are badly clogged.

Near De Longpre Ave, Los Angeles, CA 90028
Los Angeles, CA - Arrived at a customer's service room in LA to investigate a no cooling issue. Found the #2 thermostat dislodged from the subase on the wall. Re-wired thermostat, unit came back online. Will need to power wash condenser coils as they are badly clogged.
Sergio J.

Sergio J.

A cash loan store in Los Angeles County reported that their A/C was down. Our commercial tech found that power had gone out to the whole building but was on again. Reset and cycled the system, unit back online with no issues to report.

Near Woodman Ave, Los Angeles, CA 91331
Los Angeles, CA - A cash loan store in Los Angeles County reported that their A/C was down. Our commercial tech found that power had gone out to the whole building but was on again. Reset and cycled the system, unit back online with no issues to report.
Sergio J.

Sergio J.

Near Woodman Ave, Los Angeles, CA 91331
Sergio J.

Sergio J.

A check cashing store in Los Angeles CA requested emergency service for their lobby. Our commercial AC tech arrived and found the space at 85 degrees. Upon further inspection, he found the York system with the blow door open and an error on the VFD. Corrected, reset and tested system. Running normally now and supplying 56 degrees. Will monitor the VFD, it may need to be replaced in the future.

Near South La Brea Ave, Los Angeles, CA 90016
Los Angeles, CA - A check cashing store in Los Angeles CA requested emergency service for their lobby. Our commercial AC tech arrived and found the space at 85 degrees. Upon further inspection, he found the York system with the blow door open and an error on the VFD. Corrected, reset and tested system. Running normally now and supplying 56 degrees. Will monitor the VFD, it may need to be replaced in the future.
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.

3rd Quarter HVAC/R PM dispatched for a health food store in Los Angeles CA. All filters were changed on the HVAC units and heating inspection completed. All freezers onsite inspected for proper operations. Units operational but did find several freezers with missing light covers and burnt bulbs. Will quote out to customer.

Near Ventura Blvd, Los Angeles, CA 91364
Los Angeles, CA - 3rd Quarter HVAC/R PM dispatched for a health food store in Los Angeles CA. All filters were changed on the HVAC units and heating inspection completed. All freezers onsite inspected for proper operations. Units operational but did find several freezers with missing light covers and burnt bulbs. Will quote out to customer.
Sergio J.

Sergio J.

HVAC preventative maintenance was scheduled at a commercial property in Los Angeles CA today. All AC units received a full heating season check-up, alongside standard filter replacements. All units are running well, no issues to report.

Near De Longpre Ave, Los Angeles, CA 90028
Los Angeles, CA - HVAC preventative maintenance was scheduled at a commercial property in Los Angeles CA today. All AC units received a full heating season check-up, alongside standard filter replacements. All units are running well, no issues to report.
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.