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


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 Ventura Blvd, Los Angeles, CA 91604
Doug W.

Doug W.

Near N Highland Ave, Los Angeles, CA 90038
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Near S Hoover St, Los Angeles, CA 90006
Franco M.

Franco M.

Near Hollywood Blvd, Los Angeles, CA 90028
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Near Melrose Ave, Los Angeles, CA 90069
Franco M.

Franco M.

A cell phone store in LA was scheduled for air conditioning maintenance today. All filters were swapped, disconnect and motors and electrical all inspected. No issues to report on the two Trane units. PM complete.

Near Van Nuys Blvd, Los Angeles, CA 91402
Los Angeles, CA - A cell phone store in LA was scheduled for air conditioning maintenance today. All filters were swapped, disconnect and motors and electrical all inspected. No issues to report on the two Trane units. PM complete.
Franco M.

Franco M.

A pet hotel in LA had additional repairs scheduled today, for their #2 Carrier air conditioner. The technician replaced a broken belt, two pitted contactors and also cleaned the evaporator coil. After making repairs, ran and tested lobby unit. System is operational again and lobby at comfortable temperatures.

Near N Highland Ave, Los Angeles, CA 90038
Los Angeles, CA - A pet hotel in LA had additional repairs scheduled today, for their #2 Carrier air conditioner. The technician replaced a broken belt, two pitted contactors and also cleaned the evaporator coil. After making repairs, ran and tested lobby unit. System is operational again and lobby at comfortable temperatures.
Franco M.

Franco M.

A pet hotel in Los Angeles CA was scheduled for repairs today. Units #2 and #3, both Carrier systems, needed their smoke detectors and sensor modules replaced. After making quoted repairs, our technician ran and tested the units to confirm all systems were operational again.

Near N Highland Ave, Los Angeles, CA 90038
Los Angeles, CA - A pet hotel in Los Angeles CA was scheduled for repairs today. Units #2 and #3, both Carrier systems, needed their smoke detectors and sensor modules replaced. After making quoted repairs, our technician ran and tested the units to confirm all systems were operational again.
Franco M.

Franco M.

Dispatched our Los Angeles commercial HVAC technician to install a new smoke detector on a ICP system. After removing the old detector and wiring in the new, our technician cycled and tested. Confirmed detector is operating per specs, equipment is heating/cooling normally. Job complete.

Near S Barrington Ave, Los Angeles, CA 90064
Los Angeles, CA - Dispatched our Los Angeles commercial HVAC technician to install a new smoke detector on a ICP system. After removing the old detector and wiring in the new, our technician cycled and tested. Confirmed detector is operating per specs, equipment is heating/cooling normally. Job complete.
Franco M.

Franco M.

Our LA California AC technician arrived at a pet hotel to investigate issues with faulty smoke detectors, following up after the fire department had been onsite. Upon arrival, our technician found the customer's #2 and #3 Carrier units running, though the alarm company had reported they needed to be changed. Unit #2 was iced up with no belt. Tested system, will quote to troubleshoot unit #2 and replace smoke detectors on both units.

Near N Highland Ave, Los Angeles, CA 90038
Los Angeles, CA - Our LA California AC technician arrived at a pet hotel to investigate issues with faulty smoke detectors, following up after the fire department had been onsite. Upon arrival, our technician found the customer's #2 and #3 Carrier units running, though the alarm company had reported they needed to be changed. Unit #2 was iced up with no belt. Tested system, will quote to troubleshoot unit #2 and replace smoke detectors on both units.
Franco M.

Franco M.

Quoted HVAC repairs were scheduled at a fashion designer brand store in Los Angeles CA. The technician replaced all filters and belts on their two York units, and also cleaned both the evaporator and condenser coils. He repaired an electrical short and a broken drain line on unit #1. Cycled and monitored both systems after repairs, units running well and no more problems to report.

Near Melrose Pl, Los Angeles, CA 90069
Los Angeles, CA - Quoted HVAC repairs were scheduled at a fashion designer brand store in Los Angeles CA. The technician replaced all filters and belts on their two York units, and also cleaned both the evaporator and condenser coils. He repaired an electrical short and a broken drain line on unit #1. Cycled and monitored both systems after repairs, units running well and no more problems to report.
Franco M.

Franco M.

A pet hotel in Los Angeles CA reported that their lobby AC wasn't working. Our technician found two commercial Carrier systems with issues: #5 had an open return door, causing it to read the temperatures improperly. Closed and secured door, reset system and got it running fine again. Also found unit #2 a burnt out contactor and a broken belt. Did not have a matching belt available in truck stock, will quote to return with the correct parts for unit #2.

Near N Highland Ave, Los Angeles, CA 90038
Los Angeles, CA - A pet hotel in Los Angeles CA reported that their lobby AC wasn't working. Our technician found two commercial Carrier systems with issues: #5 had an open return door, causing it to read the temperatures improperly. Closed and secured door, reset system and got it running fine again. Also found unit #2 a burnt out contactor and a broken belt. Did not have a matching belt available in truck stock, will quote to return with the correct parts for unit #2.
Franco M.

Franco M.

Responded to an emergency AC request at a commercial property in LA. New site operator was concerned that a thermostat for was blank and non-responsive. Upon arrival, our technician was shown the problem t-stat and discovered it was a non-operational stat for #3. #3 has a separate remote, wireless thermostat that was operating fine. Explained the situation to the customer, no actual mechanical or electrical issues to repair today.

Near De Longpre Ave, Los Angeles, CA 90028
Los Angeles, CA - Responded to an emergency AC request at a commercial property in LA. New site operator was concerned that a thermostat for was blank and non-responsive. Upon arrival, our technician was shown the problem t-stat and discovered it was a non-operational stat for #3. #3 has a separate remote, wireless thermostat that was operating fine. Explained the situation to the customer, no actual mechanical or electrical issues to repair today.
Franco M.

Franco M.

An office air conditioner was down at a retail store on Melrose Place in LA. After checking in with the store manager, our technician inspected the Trane unit and found it completely iced up with a very dirty filter, broken condensate line, overheated fan motor and refrigerant leak. Unit also needs a new capacitor. May need to consider a blower motor replacement as well, it's vibrating badly. Will quote all needed repairs to the customer.

Near Melrose Pl, Los Angeles, CA 90069
Los Angeles, CA - An office air conditioner was down at a retail store on Melrose Place in LA. After checking in with the store manager, our technician inspected the Trane unit and found it completely iced up with a very dirty filter, broken condensate line, overheated fan motor and refrigerant leak. Unit also needs a new capacitor. May need to consider a blower motor replacement as well, it's vibrating badly. Will quote all needed repairs to the customer.
Franco M.

Franco M.

A retail store in LA reported that their sales floor was too hot and hitting 80 degrees. Upon arrival, our commercial air conditioning tech found that the air filter was dirty and refrigerant levels needed to be adjusted. Unit was functioning normally again after repairs. The technician noted that we've recently changed the filter at this store. May need to recommend more frequent filter changes to prevent clogging.

Near Melrose Pl, Los Angeles, CA 90069
Los Angeles, CA - A retail store in LA reported that their sales floor was too hot and hitting 80 degrees. Upon arrival, our commercial air conditioning tech found that the air filter was dirty and refrigerant levels needed to be adjusted. Unit was functioning normally again after repairs. The technician noted that we've recently changed the filter at this store. May need to recommend more frequent filter changes to prevent clogging.
Franco M.

Franco M.

Responded to an emergency AC request for a commercial customer in LA. Found that the ceiling was dripping over the sales floor, due to the refrigerant lines dripping condensation. Our technician re-insulated the air conditioning refrigerant lines, flushed drain lines as a precaution, and monitored system to confirm no more water was dripping into the space. Job complete.

Near Ventura Blvd, Los Angeles, CA 91604
Los Angeles, CA - Responded to an emergency AC request for a commercial customer in LA. Found that the ceiling was dripping over the sales floor, due to the refrigerant lines dripping condensation. Our technician re-insulated the air conditioning refrigerant lines, flushed drain lines as a precaution, and monitored system to confirm no more water was dripping into the space. Job complete.
Kevin S.

Kevin S.

Our LA County refrigeration technician responded to a leaking freezer request. Upon arrival, found their commercial True freezer with condensation build up on outside door. Also found some ice build-up on the evaporator coil and drain pan. Our technician removed all ice from the evaporator and tested the defrost system. No issues found with drain pan or drainage. Found a bad electrical connection for door frame heaters which are not allowing them to operate and producing condensation. Repairing the electrical connection resolved the frame heater issue. Unit at -3 degrees upon departure and no longer dripping.

Near Ventura Blvd, Los Angeles, CA 91364
Los Angeles, CA - Our LA County refrigeration technician responded to a leaking freezer request. Upon arrival, found their commercial True freezer with condensation build up on outside door. Also found some ice build-up on the evaporator coil and drain pan. Our technician removed all ice from the evaporator and tested the defrost system. No issues found with drain pan or drainage. Found a bad electrical connection for door frame heaters which are not allowing them to operate and producing condensation. Repairing the electrical connection resolved the frame heater issue. Unit at -3 degrees upon departure and no longer dripping.
Sergio J.

Sergio J.

Responded to a "store too hot" call for a commercial customer in Los Angeles CA. Arriving under emergency request, our technician found the moisture safety indicator tripped on their water source heat pump. Reset and removed it to let it dry out while he cleared out the drain line using cleaner. The moisture indicator will need more time to dry out, bypassed the indicator for now and will return tomorrow to inspect and continue troubleshooting as necessary.

Near Wilshire Blvd, Los Angeles, CA 90010
Los Angeles, CA - Responded to a "store too hot" call for a commercial customer in Los Angeles CA. Arriving under emergency request, our technician found the moisture safety indicator tripped on their water source heat pump. Reset and removed it to let it dry out while he cleared out the drain line using cleaner. The moisture indicator will need more time to dry out, bypassed the indicator for now and will return tomorrow to inspect and continue troubleshooting as necessary.
Franco M.

Franco M.

Quoted air conditioning repairs were scheduled for our commercial customer in LA. Our technician worked on several Trane systems, replacing a blower and run capacitor, as well as a belt. Ran and tested each unit after work was completed, confirmed no more issues onsite.

Near S Barrington Ave, Los Angeles, CA 90064
Los Angeles, CA - Quoted air conditioning repairs were scheduled for our commercial customer in LA. Our technician worked on several Trane systems, replacing a blower and run capacitor, as well as a belt. Ran and tested each unit after work was completed, confirmed no more issues onsite.
Franco M.

Franco M.

A coffee shop on Sunset Blvd in LA reported that their AC had been down for several weeks. Arrived for a second opinion inspection, found that the unit was off and the circuit breaker was tripped for the condenser. Further troubleshooting found the capacitor failing and a dirty condenser coil. Also found a pitted contactor that was sticking. Will quote necessary repairs to the customer, cleaning for condenser coils should also be considered.

Near Sunset Blvd, Los Angeles, CA 90029
Los Angeles, CA - A coffee shop on Sunset Blvd in LA reported that their AC had been down for several weeks. Arrived for a second opinion inspection, found that the unit was off and the circuit breaker was tripped for the condenser. Further troubleshooting found the capacitor failing and a dirty condenser coil. Also found a pitted contactor that was sticking.  Will quote necessary repairs to the customer, cleaning for condenser coils should also be considered.
Kevin S.

Kevin S.

Dispatched our Los Angeles County commercial HVAC tech back to a store in Sherman Oaks, CA, to replaced a damaged inducer draft motor. After replacing the inducer motor, restoring electrical and adjusting a blower pulley, the technician tested the system. Confirmed heat is operational again, supplying 120 degree air (50 degree cooling). Checked out with EMS to confirm no other alarms onsite.

Near Ventura Blvd, Los Angeles, CA 91403
Los Angeles, CA - Dispatched our Los Angeles County commercial HVAC tech back to a store in Sherman Oaks, CA, to replaced a damaged inducer draft motor. After replacing the inducer motor, restoring electrical and adjusting a blower pulley, the technician tested the system. Confirmed heat is operational again, supplying 120 degree air (50 degree cooling). Checked out with EMS to confirm no other alarms onsite.
Franco M.

Franco M.

Approved repairs scheduled for a commercial customer in Los Angeles County, replacing capacitors for their York and ADP split system units. After swapping out all capacitors, our technician tested and cycled all units. Amperages correct, units running per spec. Job complete.

Near Melrose Ave, Los Angeles, CA 90069
Los Angeles, CA - Approved repairs scheduled for a commercial customer in Los Angeles County, replacing capacitors for their York and ADP split system units. After swapping out all capacitors, our technician tested and cycled all units. Amperages correct, units running per spec. Job complete.
Franco M.

Franco M.

Scheduled a major air conditioning maintenance at a pet hotel in Los Angeles CA. All units had filters replaced, coils washed and drain pans/lines cleaned and cleared. Tested and measured all components, set thermostat settings for cooling season. Found multiple issues, including pitted contactors and over-amping fan motors. Will quote all issues to customer for repairs, PM complete.

Near N Highland Ave, Los Angeles, CA 90038
Los Angeles, CA - Scheduled a major air conditioning maintenance at a pet hotel in Los Angeles CA. All units had filters replaced, coils washed and drain pans/lines cleaned and cleared. Tested and measured all components, set thermostat settings for cooling season. Found multiple issues, including pitted contactors and over-amping fan motors. Will quote all issues to customer for repairs, PM complete.
Franco M.

Franco M.

Approved HVAC repairs were scheduled for our commercial customer in Los Angeles on Santa Monica Boulevard. Their Intertek make-up air unit needed its evaporator coil cleaned. After dissembling the return plenum, the technicians vacuumed and brushed the evaporator coil, then chemically rinsed the coils. Re-assembled the plenum, unit working normally and cleaning complete.

Near Santa Monica Blvd, Los Angeles, CA 90067
Los Angeles, CA - Approved HVAC repairs were scheduled for our commercial customer in Los Angeles on Santa Monica Boulevard. Their Intertek make-up air unit needed its evaporator coil cleaned. After dissembling the return plenum, the technicians vacuumed and brushed the evaporator coil, then chemically rinsed the coils. Re-assembled the plenum, unit working normally and cleaning complete.
Franco M.

Franco M.

Dispatched our commercial technician for a major HVAC maintenance at a home goods store in Westchester CA. Performed standard 180 checklist items, including filter change, coil cleaning and additional exhaust fan maintenance. Found two Lennox air conditioners with pitted contactors and another Lennox with a failing condenser fan motor. Those three units are operational, will quote for standard repairs to the customer. Confirmed no other issues with EMS, PM complete.

Near S Sepulveda Blvd, Los Angeles, CA 90045
Los Angeles, CA - Dispatched our commercial technician for a major HVAC maintenance at a home goods store in Westchester CA. Performed standard 180 checklist items, including filter change, coil cleaning and additional exhaust fan maintenance. Found two Lennox air conditioners with pitted contactors and another Lennox with a failing condenser fan motor. Those three units are operational, will quote for standard repairs to the customer. Confirmed no other issues with EMS, PM complete.