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 21 customer reviews

air filter survey




Review of RESSAC Climate Control

fast ans quick


Center Director




Review of RESSAC Climate Control


Response from RESSAC Climate Control:

Thank you for the review Laura, we appreciate the feedback on Philip's visit!


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!


Jovanny C.

Jovanny C.

Near Woodman Ave, Los Angeles, CA 91331
Ryan C.

Ryan C.

Dispatched our LA County HVAC technician to a commercial property reporting an issue with their new heater. After checking in with management, our technician inspected the system. Unit is operational but found that the thermostat had failed. Replaced under warranty for recent installation. Both stages of heating and cooling working normally now.

Near Washington Blvd, Los Angeles, CA 90016
Los Angeles, CA - Dispatched our LA County HVAC technician to a commercial property reporting an issue with their new heater. After checking in with management, our technician inspected the system. Unit is operational but found that the thermostat had failed. Replaced under warranty for recent installation. Both stages of heating and cooling working normally now.
Ryan C.

Ryan C.

A health center in Santa Monica, California, needed repairs done to two of their air conditioners. The commercial units, an ICP and a York. needed new contactors, and the ICP needed a its condenser fan motor replaced. After picking up the parts from the supplier, our technician performed the necessary repairs on both units. Ran and tested both systems, units working normally and no more issues to report.

Near Santa Monica Blvd, Los Angeles, CA 90067
Los Angeles, CA - A health center in Santa Monica, California, needed repairs done to two of their air conditioners. The commercial units, an ICP and a York. needed new contactors, and the ICP needed a its condenser fan motor replaced. After picking up the parts from the supplier, our technician performed the necessary repairs on both units. Ran and tested both systems, units working normally and no more issues to report.
Jovanny C.

Jovanny C.

Multiple HVAC repairs scheduled today at a pet hotel in Los Angeles, California. Following up on deficiencies found on the most recent maintenance service. Our technician replaced damaged insulation on an ICP unit, as well as contactors on that unit and unit #2. Unit #6 needed new economizer filters and all units had their coils washed. Confirmed all systems operational after repairs completed.

Near N Highland Ave, Los Angeles, CA 90038
Los Angeles, CA - Multiple HVAC repairs scheduled today at a pet hotel in Los Angeles, California. Following up on deficiencies found on the most recent maintenance service. Our technician replaced damaged insulation on an ICP unit, as well as contactors on that unit and unit #2. Unit #6 needed new economizer filters and all units had their coils washed. Confirmed all systems operational after repairs completed.
Jovanny C.

Jovanny C.

Dispatched our LA County air conditioning technician back to a clothing store that was warm on the sales floor and had several repairs needed. Carrier AC #4 needed a drier replaced and a restriction cleared. Our tech also replaced a contactor, capacitor and condenser fan motor on the #6 split system. Coils were also washed.

Near Beverly Blvd, Los Angeles, CA 90048
Los Angeles, CA - Dispatched our LA County air conditioning technician back to a clothing store that was warm on the sales floor and had several repairs needed. Carrier AC #4 needed a drier replaced and a restriction cleared. Our tech also replaced a contactor, capacitor and condenser fan motor on the #6 split system. Coils were also washed.
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A commercial property in Los Angeles, California, received a new HVAC unit today. Our installation team arrived early to disconnect the old equipment and prepare for removal. After the crane removed the old system and placed the new, our technicians reconnected all wiring, drain lines and sealed curbing. Tested the economizer, powered up the system and confirmed cooling.

Near W Washington Blvd, Los Angeles, CA 90016
Jovanny C.

Jovanny C.

An office building in LA required repairs to their air conditioning system today. One York unit required a new dual run capacitor, and another unit had a fan motor that had been overheating. Our technician brought all necessary parts, removed the failed components and replaced them. Powering the units back on, our technician tested both systems and confirmed unit all systems are operational again.

Near Sunset Blvd, Los Angeles, CA 90046
Los Angeles, CA - An office building in LA required repairs to their air conditioning system today. One York unit required a new dual run capacitor, and another unit had a fan motor that had been overheating. Our technician brought all necessary parts, removed the failed components and replaced them. Powering the units back on, our technician tested both systems and confirmed unit all systems are operational again.
Philip P.

Philip P.

Spring maintenance was scheduled today for our commercial customers HVAC and refrigeration equipment. All freezers were inspected, amps tested and refrigerant levels confirmed. Spring checklist completed on HVAC. No issues to report.

Near Chatsworth St, Los Angeles, CA 91344
Los Angeles, CA - Spring maintenance was scheduled today for our commercial customers HVAC and refrigeration equipment. All freezers were inspected, amps tested and refrigerant levels confirmed. Spring checklist completed on HVAC. No issues to report.
Philip P.

Philip P.

Our LA County HVAC and refrigeration technician completed spring service today at a health center, performing standard major checklist items on their equipment, including filter changes and amperage changes. All units are running normally.

Near Ventura Blvd, Los Angeles, CA 91364
Los Angeles, CA - Our LA County HVAC and refrigeration technician completed spring service today at a health center, performing standard major checklist items on their equipment, including filter changes and amperage changes. All units are running normally.
Milton M.

Milton M.

We received an EMS report regarding a customer in LA that showed one HVAC unit offline, and onsite staff reported a unit icing over. Upon arrival, our A/C technician inspected the commercial Carrier unit and found no high voltage and the main breaker tripped. Determined that a shorted crank case heater had caused the voltage loss. Will quote necessary repairs to the customer. Confirmed with EMS that all other units are operating normally.

Near Beverly Blvd, Los Angeles, CA 90048
Los Angeles, CA - We received an EMS report regarding a customer in LA that showed one HVAC unit offline, and onsite staff reported a unit icing over. Upon arrival, our A/C technician inspected the commercial Carrier unit and found no high voltage and the main breaker tripped. Determined that a shorted crank case heater had caused the voltage loss. Will quote necessary repairs to the customer. Confirmed with EMS that all other units are operating normally.
Philip P.

Philip P.

A clothing store in Sherman Oaks, CA, reported an active water leak by their checkout counter. The site had a trash can catching the water. After checking in with management, our technician traced the leak up to the roof-line and inspected all the A/C units. All of our customers air conditioners were clear, all pans dry with no signs of leaking. Continued tracing the leak and determined it's coming from a separate area above our customer's equipment that's the responsibility of another store in the mall. Will report the problem to mall management to address ASAP.

Near Riverside Dr, Los Angeles, CA 91423
Los Angeles, CA - A clothing store in Sherman Oaks, CA, reported an active water leak by their checkout counter. The site had a trash can catching the water. After checking in with management, our technician traced the leak up to the roof-line and inspected all the A/C units. All of our customers air conditioners were clear, all pans dry with no signs of leaking. Continued tracing the leak and determined it's coming from a separate area above our customer's equipment that's the responsibility of another store in the mall. Will report the problem to mall management to address ASAP.
Jovanny C.

Jovanny C.

Minor winter maintenance scheduled today for our commercial customer in Los Angeles, CA. After completing the minor service checklist and replacing filters, the technician noticed that there was no gas going to the air conditioner, providing no heat to the customer. After checking the gas lines and components, he confirmed that there was no gas being supplied. He closed the gas valve until the gas supply issue can be resolved between the customer and the gas company.

Near Melrose Ave, Los Angeles, CA 90046
Los Angeles, CA - Minor winter maintenance scheduled today for our commercial customer in Los Angeles, CA. After completing the minor service checklist and replacing filters, the technician noticed that there was no gas going to the air conditioner, providing no heat to the customer. After checking the gas lines and components, he confirmed that there was no gas being supplied. He closed the gas valve until the gas supply issue can be resolved between the customer and the gas company.
Philip P.

Philip P.

Dispatched our commercial air conditioning technician to a health center in Studio City, CA, to investigate a no heat issue. Their A/C unit was running correctly, but the thermostat was not programmed correctly and was set too high for heat to kick in. After reprogramming, the site was comfortable again.

Near Ventura Blvd, Los Angeles, CA 91604
Los Angeles, CA - Dispatched our commercial air conditioning technician to a health center in Studio City, CA, to investigate a no heat issue. Their A/C unit was running correctly, but the thermostat was not programmed correctly and was set too high for heat to kick in. After reprogramming, the site was comfortable again.
Jovanny C.

Jovanny C.

Dispatched our LA County technician to complete approved A/C repairs for one of our commercial customers. The Trane units needed their condenser coils disassembled to receive a thorough, deep clean. While performing the deep clean, our technician found the unit #6 was low on refrigerant due to leaking schraeder valves. Received approval to make repairs to #6 while onsite. Obtained valves and replaced. Confirmed all units were operating normally again. Job complete.

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

Jovanny C.

Sent a technician to a chiropractors office to perform regularly scheduled HVAC maintenance. Full winter services performed. While performing services, our technician found that the crankcase heater needs to be replaced, and that the drain line had cracked at the connection to the pan. Both the condenser and blower motors are overheating, and the fan motor is very loud. This is an older unit, and the customer may consider replacing it due to changes in refrigerant requires in 2020, and overall condition of system. Unit is off at the disconnect for safety.

Near Mulholland Dr, Los Angeles, CA 91364
Los Angeles, CA - Sent a technician to a chiropractors office to perform regularly scheduled HVAC maintenance. Full winter services performed. While performing services, our technician found that the crankcase heater needs to be replaced, and that the drain line had cracked at the connection to the pan. Both the condenser and blower motors are overheating, and the fan motor is very loud. This is an older unit, and the customer may consider replacing it due to changes in refrigerant requires in 2020, and overall condition of system. Unit is off at the disconnect for safety.
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