Recent Projects · Milpitas, CA
AC Refrigerant Recharge in Milpitas, CA (R-410A)
Upgrade Home Services restored cooling to a Milpitas, CA air conditioner that was low on refrigerant, in a project shared in April 2026. After inspecting the system, our technician added 3 pounds of R-410A refrigerant and checked the pressures and overall performance, and the AC went back to delivering consistent, reliable cooling throughout the home.
Why was this Milpitas AC running but not cooling?
The homeowner had a common problem: the air conditioner was running but no longer cooling well. Weak airflow and uneven indoor temperatures are often signs of low refrigerant, the fluid an AC uses to carry heat out of the home.
After a detailed system inspection, our technician confirmed the unit was low on refrigerant. Left alone, low refrigerant can cause longer run times, higher energy bills and extra strain on the AC.
How did we fix it?
- Inspection. We inspected the system and confirmed the refrigerant was low.
- Recharge. We added 3 pounds of R-410A refrigerant.
- System check. We checked for proper pressure levels and overall performance.
What was the result?
Once the recharge was done, the system was back to efficient operation, delivering consistent and reliable cooling throughout the home.
If your air conditioner isn’t cooling as it should, a refrigerant recharge may be needed. Proper diagnosis and handling by a licensed professional helps your system run safely and efficiently. Our diagnostic visit is $89, waived when you approve the repair.
Key takeaway: An AC that runs but doesn’t cool may be low on refrigerant. A technician can confirm it with gauges, recharge the system and check the pressures.
Upgrade Home Services is a family-owned HVAC contractor in Milpitas, serving Santa Clara and San Mateo counties since 2002. Licensed, CSLB #1066776. Free estimates: (408) 649-3198.
AC refrigerant questions
How do I know if my AC is low on refrigerant?
Common signs are an AC that runs but doesn’t cool well, weak airflow and uneven temperatures. A technician confirms it by inspecting the system and checking the pressures.
What is R-410A?
R-410A is the refrigerant many existing air conditioners use. Newer systems use a different type called A2L refrigerant.
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