VRF and VRV service on the Peninsula
VRF or VRV acting up? Start here.
VRF and VRV are the same idea under different names: an outdoor unit feeding many indoor units through refrigerant lines, each zone controlled on its own. We diagnose, repair and maintain them across San Mateo and Santa Clara counties.
What is the difference between VRF and VRV?
Almost nothing in how they work. VRF means variable refrigerant flow, the general name for the technology, and VRV, variable refrigerant volume, is the name Daikin uses for its version.
Both run one outdoor unit that varies how much refrigerant it sends to many indoor units, so each room or zone can heat or cool on its own. That is why they turn up in buildings with many separate spaces.
What a VRF or VRV service visit covers
With many indoor units tied to one outdoor unit, the fault can sit in any of them or in the link between them. The visit narrows it down.
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You tell us what the zones are doing
One zone warm, several cold, a unit that won't start, an error code on a controller. Note which indoor units are affected.
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We read the system
Error codes on the controllers and the outdoor unit say where to look first, and show whether the problem is one zone or the whole system.
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We test the part that code points to
Refrigerant pressures and temperatures, sensors, valves, fans, the wiring between outdoor and indoor units, and the electrical supply.
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We repair it and check every zone
A repair isn't finished until each affected indoor unit is running and the readings are right.
What goes wrong with a VRF or VRV system?
The faults we look for, from the zone that complains to the outdoor unit:
- One zone not heating or cooling, while the rest work.
- An error code on a controller or an indoor unit.
- Communication faults between the outdoor unit and the indoor units.
- Refrigerant leaks. A system with long refrigerant lines has a lot of places for one.
- Failed sensors, valves or fan motors.
- Blocked condensate drains or pumps at the indoor units.
Does a VRF or VRV system need maintenance?
Yes. The indoor units have filters and coils that load up, the drains need to run clear, and the outdoor unit needs its coil clean and its readings checked. Maintenance finds a slow refrigerant loss or a weakening part before a zone, or the whole system, goes down.
We service Mitsubishi Electric and Daikin systems. That means we work on them, not that we are a maker's dealer.
Tell us what the system is doing
Call with the error code or the zone that's off, or book a visit online.
Does the new refrigerant rule apply to VRF systems?
Yes. California requires new VRF equipment to use a refrigerant with a global warming potential (GWP) less than 750, and for new VRF systems the date is January 2026.
That affects a replacement or a new system. A repair to a system you already have is a different job, and we will tell you which one you are facing.
Source: California Air Resources Board, air-conditioning equipment rules, checked 2026-10-17
Tell us what it's doing. We'll take it from there.
Call and describe the problem: the noise, the smell, the room that never warms up. Or book a visit online.
