Our Repairs

Freon refilling in San Mateo, CA

July 11, 2023 2 min read
Share

Nur HVAC performed a freon refilling service for a client in the San Mateo area; we handle the same refrigerant work for homeowners from the Peninsula out to Bonny Doon. R-410A, commonly known by its brand name Puron, is a refrigerant used in air conditioning systems. R-410A was developed as a replacement for R-22, which has been found to contribute to ozone depletion.

Key points about R-410A

  • Environmentally friendly: R-410A doesn’t contain chlorine, which makes it ozone-friendly and complies with environmental regulations.
  • High-efficiency refrigerant: it’s known for its excellent cooling capacity and energy efficiency. It allows air conditioning systems to operate at higher pressures and achieve greater performance.
  • System compatibility: air conditioning systems designed for R-410A use specific components, such as compressors and heat exchangers, to accommodate the higher pressures and characteristics of this refrigerant.

When does an air conditioner need a refrigerant recharge?

An air conditioner does not consume refrigerant the way a car consumes fuel, so if the charge is low, it usually means the refrigerant has escaped somewhere. Common signs include weak or warm airflow from the vents, longer run times, ice forming on the refrigerant lines, and rising energy bills even though the system seems to run constantly.

Ready for reliable comfort?

Book your San Mateo County HVAC service today - fast, honest, guaranteed.

Because handling refrigerant requires proper equipment and certification, refilling is a job for a professional technician. During a service visit, the technician checks the system pressure, looks for the cause of the low charge, and brings the refrigerant back to the level the manufacturer specifies. Simply topping off a leaking system without finding the source only postpones the problem, so a careful inspection is part of doing the job right. A correctly charged system cools faster, runs shorter cycles, and puts less strain on the compressor, which is one of the most expensive parts to replace. Keeping the charge at spec is inexpensive insurance for the whole system. If your AC is blowing warm air or struggling to keep up, our air conditioner repair team can test the charge and get your cooling back on track.

Freon refilling with R-410A refrigerant in San Mateo, CA

Air conditioner refrigerant recharge in San Mateo, CA

Freon refilling service by Nur HVAC in San Mateo, CA

Questions about your HVAC?

Talk to a real San Mateo County technician - free estimates, honest advice, no pressure.

Reviews

Trusted by your neighbors

4.9185+ reviews onYelp
Brian B.
Brian B.
Mar 2026
Yelp

“Great service twice now from Islam D! I have 2 small children and both times they've gone above and beyond to help me get heat going as quickly as possible. First time the motherboard went out on my furnace and Islam had an old one with him that he was able to quickly install while we waited for new replacement under warranty as unit is under 3 years old. Came back once he had new one and swapped them out again. This most recent time Islam came after hours and I can only imagine after an already long day to make sure he was able to help us as of course it had been our coldest days of the winter. We went to furnace and he checked everything to find nothing actually wrong. He decided to switch up wiring to thermostat as only 2 of the 5 wires available were being used and thankfully that worked. Even came out of it being able to now use the "fan" function on furnace. As long as Islam works for Nur HVAC, I will not being calling anyone but him!”

Xiao Y.
Xiao Y.
Jul 2023
Yelp

“I'd like to highly recommend NUR HVAC. I recently replaced my old furnace and AC with NUR. David, Alex and Roman were very nice and professional, they clearly explained the situation and provided several options. The price was fair and Alex and Roman did a great job on the installation. After the work, Roman helped me to replace our old bubble wrap nicely, and Alex made sure that we had enough Freon (actually they added some extra Freon considering the pipe) according to the regulations. They worked very hard until night. The second day, when I reported that the thermostat was not working, Alex drove to our place again to take another look. Turns out that I forgot to turn on a switch. I will definitely use NUR HVAC in the future”

J
Jixuan W.
Mar 2024
Yelp

“Nur HVAC replaced my old gas furnace and replaced it with a Mitsubishi heat pump. They also redid my ducts. David initially came to my house to give me a quote, he offered me a ductless option which no other HVAC companies suggested, and was clearly experienced in HVAC installation, and gave me the best quote for top of the line equipment. Other HVAC companies sent salespeople, but David was technical and addressed my concerns and questions with great detail. The team that installed my new heat pump went above and beyond - they fixed some loose wiring in the crawlspace and adjusted the gas and exhaust lines for my water heater to save space. The installation was well done, the wiring and new lines they ran were clean and organized, they ensured that all the ducts were sealed and the airflow was balanced to all my rooms. I'm very happy with my new hvac system and would highly recommend Nur HVAC!”

L
Linda V.
Feb 2025
Yelp

“Nur HVAC recently installed a heat pump (so we could finally have cool air during the summer!) and a new furnace since we still prefer to heat with gas. I could not be more pleased. I obtained estimates from 3 companies, including Nur. One was the Costco installer. They were nice but very expensive and didn't have the greatest post-install reviews. Still, I considered them. Another company provided what seemed like a pitch for a time share, complete with an album showing their reviews. This lasted close to 20 minutes! Nice company but out of the ballpark on price (maybe the presentation was intended to make you forget the final price?) and the estimate ran multiple pages which made comparing options impossible. Then came Artur with Nur HVAC. He was prompt, provided an easy to read, no nonsense estimate comparing options and did not try to upsell me by actually recommending less expensive options. They also had the best price no matter what we went with. The team which did the install was efficient, prompt, did solid work and were extremely polite. The job was so well done that when the city inspector came by for the final sign off, he was impressed by the work and told me that he has never had a problem with Nur. He explained how others take short cuts and how he is able to spot the problems. He told me Nur HVAC was one of only a handful of companies that always passed inspection as the installs were safe and properly done. I could not praise Artur and his team more! You will not find a more polite, professional and hardworking company that provides such great value for the money.”

S
Susie V.
Feb 2022
Yelp

“David provided excellent, professional installation service for a top of the line kitchen vent. To complete the installation, he had to tie into my HVAC, electrical, and provide additional structural support in my attic so that my vent could properly hang from the ceiling. When decisions had to be made regarding placement, he explained clearly my options and was dedicated to installing it to my satisfaction. He also installed a dishwasher and was able to work me into his schedule in a timely manner (arriving at 7am because of my urgent need.) I was so pleased with his work, I sent him to my 85 year old parents' house to replace their rusted piping and laundry sink as well as all of their old plumbing fixtures. His pricing was very fair for his quality work. I will be hiring him again soon!”

Google Reviews

What our customers say on Google

5.0505+ Google reviews
Elizabeth Avery
Elizabeth Avery
Mar 2026

“Very pleased with their heat pump installation. I got three quotes and theirs was just a little lower than the others, but I chose them because they explained everything very well. They did not try to upsell like the other companies, which I appreciated. Installation went quickly and everyone was very pleasant. Photo with Arthur and our heat pump. Update, year and a half later: everything is working well. They helped me apply for the rebate after it was installed. I asked if I should do maintenance and they showed me what kind of filter to get. David came by and checked everything over (2nd photo) and didn't even charge because nothing was needed beyond changing the filter.”

Ryan Corces
Ryan Corces
Sep 2025

“It is no coincidence that Nur HVAC has such positive reviews. This team is just as good as all of the reviews say. We had them upgrade our old gas furnace and gas water heater to heat pump units and I can say hands down that this was the most positive home improvement / construction project we've done. Fedor coordinated our project and was consistently responsive and helpful. He went above and beyond to make sure we got the equipment I wanted. Vladimir and Arthur performed most of the install and it went super smoothly and the equipment works perfectly. They were always courteous and communicative. We had one issue related to very high water pressure from the street and even though this wasnt their fault, Nur HVAC prioritized helping us solve the problem over the holidays. I could not recommend this team more.”

David Zhang
David Zhang
Jun 2026

“I highly recommend Nur HVAC! They upgraded my old split furnace HVAC with a heat pump HVAC retrofit. Fedor and the installation team showed outstanding professionalism and craftsmanship in all phases of the project: * Detailed initial project scoping tailored to my home's needs * Fast, friendly communication from start to finish * Solved new complexities we encountered on site * Collaboratively discussed alternative solutions, never felt pushy * High work quality I would absolutely choose Nur again for future HVAC work.”

Dawn Giusti
Dawn Giusti
Dec 2025

“I’ve been using NUR HVAC for the last two years, first at my former house and now at my new one. Every experience has been excellent. Their technicians are fast, courteous, and truly attentive. They take the time to identify the issue, explain what’s going on, and fix it with ease. Most recently, Adlan installed a new Ecobee thermostat for me, and once again the attention to detail and willingness to walk me through how to use it made everything simple. I couldn’t ask for better service. I highly recommend NUR HVAC to anyone looking for reliable, professional, and easy to work with technicians.”

Chris Stallings
Chris Stallings
Jul 2026

“The NUR rep was amazing. He was meticulous in checking every aspect of our air-conditioning system, all of which he patiently took the time to explain to someone who knows very little about it, and we ended up saving thousands of dollars because all the things that that our previous company had told us needed to be replaced were working just fine.”

Lourdes Zoeller
Lourdes Zoeller
Sep 2024

“NUR HVAC definitely delivered on its promise of a new furnace. The technician, Adlan, was a true professional knowledgeable of his craft, extremely neat & organized with a very pleasant demeanor. The home office was equally prompt on informing me of the progress and quickly addressed any issues I may have. I definitely will be calling them soon for the installation of my AC. Suffice to say, I hope I will be interacting again with Fedor and Adlan. Thank you for a job well done!”

Amanda Fischer
Amanda Fischer
Sep 2024

“What a great and honest company.They came same day (within 2 hours) to fix my heater! My technician, Adlan, was knowlegable, friendly, and conscientious. I know nothing about heaters and they could have charged me anything for repairs but Adlan was so honest-- he thoroughly examined my heater, removed some dust debris that was causing a burning smell and said nothing more needed to be done. He charged me nothing additional other than the $75 service call fee! Even though he was here for at least 50 minutes thoroughly examining all components of my heating system. When you find an honest and thorough company, it is everything!! I highly recommend using them.”

Need this done at your home?

Our certified San Mateo County technicians are ready. Book online in under a minute or give us a call.

Call Book