Best Heating & Air Conditioning / HVAC In Ontario

“All Pro was a wonderful customer service experience for us! The service technicians, Sean and Nate, arrived exactly when they said they would on the service day. There was no having to wait for them and wondering when they would arrive. That was the initial wow-factor! Then, they wasted no time getting right to work on the service call. That was also a wow-factor. Sean and Nate were punctual, extremely courteous, skilled, focused, and highly effective. The installation was completed sooner than expected, and that was also a wow-factor. Upon completion of the installation, they thoroughly tested the new system to ensure that it was working properly, and it worked perfectly. They cleaned up thoroughly after themselves when they were done. They were polite and attentive throughout the service, and the quality of the work was impeccable. After this experience, I am a fan of All Pro - including Mike, the comfort associate who came out the day before and patiently and thoroughly went over everything with us so we would know exactly what to expect.
If you, or someone you know, is in need of heating and/or cooling service, I highly recommend you give All Pro a call. You will be happy you did, and make sure to ask for Sean and Nate!
I also want to give a shout-out to Jeffrey and his apprentice (whose name unfortunately escapes me) for the thorough inspection visit to diagnose the problem with the cooling/ heating unit. Both technicians were polite, personable, and focused. They went over all their findings, step by step, and reviewed our options for replacement systems and installation scheduling.
If you're looking for quality service and expertise, call All Pro. Ask for Jeff, his apprentice, Mike, Sean, and Nate. You'll be happy you did.

James
For the June 30th cooling/heating job in Rancho Cucamonga for my mother-in-law.“

“We recently needed to have a complete air duct replacement of our HVAC system. Baran and Oscar did an amazing job for us. They were professional and very knowledgeable…completing the job in half a day. We were impressed with their professionalism and the steps they took to keep our home clean during and after their work was completed. Would highly recommend Diamond Air for any heating/AC needs.“

“We live in an older condo with no AC and Macawsome did a great job of working through the process with the HOA to install HVAC! We highly recommend Macawsome for your HVAC install or repair.“

“Same day service. Tanner explained several options to prevent ac/ thermostat failure.“

“Andrew was my tech he was courteous,kind, and very informative, recommendations given.“

“Sanchez and his crew were just great! They explained everything that they were going to do with the attic insulation. They sealed off all the areas and got to work. They were very thorough and clean. We felt the difference in the house in no time.“

“We love Kevin! We love M&M...we are long time customers (10+ years)...absolutely recommend.

Update 10/16: Just had the pleasure of seeing Kevin again - he is so polite and talented! We look forward to our bi-annual maintenance because of Kevin!

Update: 4/16/2026 - Kevin was here today and it was SO good to see him! He is so efficient! Plus he is truly a nice person - we've known him for around 5 years now - you're lucky if he is the one you get to service your AC unit!“

“Keeping It Cool Air Conditioning and Heating was a lifesaver for my elderly mother's home! After dealing with another company (to put it nicely—even though he doesn’t deserve it, one “gentleman”) who wouldn’t resolve the issue and was quite unprofessional, the KICHA team came in and completely took over with confidence, professionalism, and diligence. The team—especially Eddie and Tony—were amazing: thorough, professional, knowledgeable, and incredibly proactive. They quickly got to the root of the problem and had everything running smoothly in no time. It was a huge relief to finally have a team that knew what they were doing and genuinely cared about doing it right.

What meant the most was the peace of mind they brought—knowing my mother would finally be comfortable on those hot days. I can’t recommend Keeping It Cool enough!“