In order to provide our exceptional commercial HVAC & refrigeration service to office parks, malls, retail stores and big box outlets in Modesto, CA and throughout California, RESSAC employs great technicians, focuses on operational efficiency and keeps abreast of advancing technologies. Those are the key elements of every Modesto, CA commercial assessment, design, installation, maintenance, monitoring or repair service we offer. Read our reviews below to learn what our business customers have to say.

Local Reviews
for Modesto, CA

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

great service




Review of RESSAC Climate Control

great service he always find the problem and is a very nice person


Response from RESSAC Climate Control:

Hi Anabel, thank you so much for the lovely feedback, we will let our tech Barry know you appreciated his service last week!


Amazing Job!




Review of RESSAC Climate Control

Barry did a fantastic job! He was very professional and efficient. I’ll be recommending Ressac, and Barry in particular, to all the Supercuts in our area. Thank you!


Response from RESSAC Climate Control:

Thank you for the 5-star feedback, Andrea! We greatly appreciate your recommendation for both us and our tech Barry.


store manager




Review of RESSAC Climate Control

BARRYS SERVICE IS GREAT , HE TAKES THE TIME TO CHECK WHAT WAS PREVIOUSLY WRONG , VERY PLEASANT ALWAYS


Response from RESSAC Climate Control:

Hi Elizabeth, thank you so much for the review! Happy to hear we're providing consistent, quality service for your store.


Great Service




Review of RESSAC Climate Control

He was very informative and thorough


Response from RESSAC Climate Control:

Hi Hilda, happy to hear Barry's service was satisfactory and that he was able to get your server room unit running again. Thank you for the positive review!


Great service




Review of RESSAC Climate Control

Angel Alvarez was very nice and showed us how to use the Ac System, great service!


Response from RESSAC Climate Control:

Thanks for the review Briseida! Happy to hear that Angel was able to help you guys!


JR i.

JR i.

HVAC Fall Maintenance: All units at a cell phone provider in Modesto, CA, serviced today. Filters replaced, full fall inspection and heating startup completed. No deficiencies to report.

Near Plaza Pkwy, Modesto, CA 95350
Modesto, CA - HVAC Fall Maintenance: All units at a cell phone provider in Modesto, CA, serviced today. Filters replaced, full fall inspection and heating startup completed. No deficiencies to report.
Barry S.

Barry S.

Received an urgent request from a financial institution in Modesto California, reporting that their server room air conditioner was in alarm. After checking in with the office manager, our technician inspected the server room unit which was recently installed. Found no issues, no alarms as reported, no cooling failures. Set the setpoint slightly lower by 1 degree per customer request. No repairs needed.

Near 10th St, Modesto, CA 95354
Modesto, CA - Received an urgent request from a financial institution in Modesto California, reporting that their server room air conditioner was in alarm. After checking in with the office manager, our technician inspected the server room unit which was recently installed. Found no issues, no alarms as reported, no cooling failures. Set the setpoint slightly lower by 1 degree per customer request. No repairs needed.
Barry S.

Barry S.

On arrival, checked in with store manager and mall security. Found condensing unit breaker on. Put t-stat in a call for cool. Gained roof access. Saw condensing fan on but compressor was not. Found compressor tripped on thermal. Poured water on compressor until cool to the touch. Found start amps high and herm terminal on capacitor reading low. Replaced capacitor and added a start assist. LRA is 42.3 amps. RLA is 10.2 amps FLA is 0.90 amps. All amps draw within range. Pressures are good. Obtained signature on work acknowledgment. Checked out with mall security.

Near Dale Rd, Modesto, CA 95356
Barry S.

Barry S.

Our commercial customer in Stanislaus County, California, reported that one of their freezers was running at high temperatures. After checking in with the manager, our refrigeration technician troubleshooted the system. Determined that the defrost relay had failed, and and unit was low on refrigerant. Traced the leak to the discharge service valve and was able to repair same day. Will source and order the defrost relay ASAP, unit is running at -5* but advised manager not to overstock unit until we return and replace the relay.

Near McHenry Ave, Modesto, CA 95350
Modesto, CA - Our commercial customer in Stanislaus County, California, reported that one of their freezers was running at high temperatures. After checking in with the manager, our refrigeration technician troubleshooted the system. Determined that the defrost relay had failed, and and unit was low on refrigerant. Traced the leak to the discharge service valve and was able to repair same day. Will source and order the defrost relay ASAP, unit is running at -5* but advised manager not to overstock unit until we return and replace the relay.
Barry S.

Barry S.

Our Modesto California HVAC tech returned to a phone store to complete approved work. After checking in with the manager and powering down the Carrier unit, he removed the failed condenser fan motor and old capacitor, and replaced both. Powered unit back up and cycled on in cooling. System is back up and running as expected, with a 21 degree temperature split.

Near Plaza Pkwy, Modesto, CA 95350
Modesto, CA - Our Modesto California HVAC tech returned to a phone store to complete approved work. After checking in with the manager and powering down the Carrier unit, he removed the failed condenser fan motor and old capacitor, and replaced both. Powered unit back up and cycled on in cooling. System is back up and running as expected, with a 21 degree temperature split.
Barry S.

Barry S.

Dispatched our Stanislaus County air conditioning tech to a retail store for PM services. Completed full PM checklist including filter change and coil cleaning. All systems are operational. Checked out with store management, PM complete.

Near Dale Rd, Modesto, CA 95356
Modesto, CA - Dispatched our Stanislaus County air conditioning tech to a retail store for PM services. Completed full PM checklist including filter change and coil cleaning. All systems are operational. Checked out with store management, PM complete.
Barry S.

Barry S.

HVAC maintenance scheduled at jewelry store in Modesto California. The technician inspected all systems onsite, checked thermostat programming, changed filters and confirmed all units were operational. No problems to report, PM complete.

Near Dale Rd, Modesto, CA 95356
Modesto, CA - HVAC maintenance scheduled at jewelry store in Modesto California. The technician inspected all systems onsite, checked thermostat programming, changed filters and confirmed all units were operational. No problems to report, PM complete.
Barry S.

Barry S.

An AC alarm was sounding in a customer's server room. Upon arrival, our commercial technician found the Leibert split system with a low supply temp due to a restricted TXV. Will need to source and quote replacement of TXV, unit is running partially at this time.

Near 10th St, Modesto, CA 95354
Modesto, CA - An AC alarm was sounding in a customer's server room. Upon arrival, our commercial technician found the Leibert split system with a low supply temp due to a restricted TXV. Will need to source and quote replacement of TXV, unit is running partially at this time.
Barry S.

Barry S.

Responded to a no cooling request at a salon in Modesto California. Upon arrival, checked in with store manager and gained roof access. The technician found the commercial Carrier air conditioner with a burnt-up spade connector on the RUN terminal at compressor. Replaced spade connector and reset breaker. Unit is back online: return air temp 73.5deg, supply air temp 47deg, and temperature split 26.5deg. Took photos and confirmed site was comfortable again.

Near Sisk Rd, Modesto, CA 95356
Modesto, CA - Responded to a no cooling request at a salon in Modesto California. Upon arrival, checked in with store manager and gained roof access. The technician found the commercial Carrier air conditioner with a burnt-up spade connector on the RUN terminal at compressor. Replaced spade connector and reset breaker. Unit is back online: return air temp 73.5deg, supply air temp 47deg, and temperature split 26.5deg. Took photos and confirmed site was comfortable again.
JR i.

JR i.

Received a request from a cell phone shop in Modesto, California, for their air conditioning not responding. Tech arrived onsite and inspected the equipment. Reset the thermostat to cooler temperature for the back room, per manager request. Thermostat was not responding, traced issue to a tripped smoke detector for the backroom unit. Spoke to the manager, some food had been burned recently in the room. Reset detector and cycled units. Detector didn't trip again, all other equipment working well.

Near Dale Rd, Modesto, CA 95356
Modesto, CA - Received a request from a cell phone shop in Modesto, California, for their air conditioning not responding. Tech arrived onsite and inspected the equipment. Reset the thermostat to cooler temperature for the back room, per manager request. Thermostat was not responding, traced issue to a tripped smoke detector for the backroom unit.  Spoke to the manager, some food had been burned recently in the room. Reset detector and cycled units. Detector didn't trip again, all other equipment working well.
Barry S.

Barry S.

Dispatched our Modesto CA PM tech to a finance office. Inspected all three Leibert air conditioners, cleaned reusable filters and found unit #2 with a failed compressor contactor that will need to be replaced. Only unit affected, will quote repairs to customer.

Near 10th St, Modesto, CA 95354
Modesto, CA - Dispatched our Modesto CA PM tech to a finance office. Inspected all three Leibert air conditioners, cleaned reusable filters and found unit #2 with a failed compressor contactor that will need to be replaced. Only unit affected, will quote repairs to customer.
JR i.

JR i.

AC technician arrived at a Modesto, CA, to complete approved repairs on a Carrier air conditioner. The unit was low on refrigerant, and needed a full leak search and repair. Located the leak at the discharge valve. Repaired and reset valve, verified system was leak free. Recharged the unit with 410A refrigerant. Tested system, unit is working but disconnect is not functioning. Bypassed the disconnect switch temporarily, will quote for additional repairs to customer ASAP.

Near Plaza Pkwy, Modesto, CA 95350
Modesto, CA - AC technician arrived at a Modesto, CA, to complete approved repairs on a Carrier air conditioner. The unit was low on refrigerant, and needed a full leak search and repair. Located the leak at the discharge valve. Repaired and reset valve, verified system was leak free. Recharged the unit with 410A refrigerant. Tested system, unit is working but disconnect is not functioning. Bypassed the disconnect switch temporarily, will quote for additional repairs to customer ASAP.
Barry S.

Barry S.

Modesto area AC technician arrived at a finance service company for scheduled preventative maintenance. The tech performed their standard 180 PM, including cleaning the washable filters on the Leibert AC units. Found the server room unit with an iced up TXV, which he noted and reported to the client. All equipment cooling at this time.

Near 10th St, Modesto, CA 95354
Modesto, CA - Modesto area AC technician arrived at a finance service company for scheduled preventative maintenance. The tech performed their standard 180 PM, including cleaning the washable filters on the Leibert AC units. Found the server room unit with an iced up TXV, which he noted and reported to the client. All equipment cooling at this time.
Barry S.

Barry S.

Near 10th St, Modesto, CA 95354
Ryan E.

Ryan E.

RESSAC technician dispatched to a cash advance shop in Modesto, CA, for the site not cooling. Found that the unit was iced over at the evaporator coil, system was restricted due to extremely clogged filters. Tech defrosted the unit and removed the filters, replacing with clean filters. Site needs recurring maintenances, will alert customer.

Near E Orangeburg Ave, Modesto, CA 95355
Modesto, CA - RESSAC technician dispatched to a cash advance shop in Modesto, CA, for the site not cooling. Found that the unit was iced over at the evaporator coil, system was restricted due to extremely clogged filters. Tech defrosted the unit and removed the filters, replacing with clean filters. Site needs recurring maintenances, will alert customer.
Ryan E.

Ryan E.

Near E Orangeburg Ave, Modesto, CA 95355
Ryan E.

Ryan E.

Near Dale Rd, Modesto, CA 95356
Angel A.

Angel A.

Our a/c technician was called out to an insurance company to repair a thermostat which was not turning on. Tech replaced old thermostat with a Honeywell ProSeries. AC unit is back up and running in heating and cooling. Installation is complete.

Near Standiford Ave, Modesto, CA 95350
Modesto, CA - Our a/c technician was called out to an insurance company to repair a thermostat which was not turning on. Tech replaced old thermostat with a Honeywell ProSeries. AC unit is back up and running in heating and cooling. Installation is complete.
Angel A.

Angel A.

Near H St, Modesto, CA 95354
Edgar  A.

Edgar A.

Rtu 2 thermostat failed replaced to get unit online

Near Pelandale Ave, Modesto, CA 95356
Edgar  A.

Edgar A.

Near Dale Rd, Modesto, CA 95356