When the walk-in alarm hits at 4am with $8,000 of inventory at stake, you do not need a service ticket, you need a tech. Onzone covers commercial walk-in coolers and freezers across the Bay Area, 24/7.
New installs, service contracts, emergency repair, condensing unit replacement, evaporator service, controls. Restaurants, grocery, retail, cold storage. EPA-certified refrigerant handling on every visit.
Product temperatures climb even though fans run, often from dirty coils, low refrigerant, failed controls, or air infiltration.
Heavy frost on the evaporator, ceiling, or door frame can point to defrost issues, bad gaskets, or drain problems.
The system starts and stops repeatedly, which can damage equipment and usually requires electrical, pressure, and control diagnostics.
A silent cooler or freezer may have a failed thermostat, contactor, breaker, fan motor, control board, or safety switch.
If your walk-in fails at 2am the night before service, the line is answered live. A refrigeration tech is dispatched immediately. Inventory loss is the worst kind of preventable.
R-404A, R-407A, R-448A, R-454A. EPA 608 certified on every tech. We are tracking the A2L refrigerant phase-in so future-proof installs use the right refrigerant the first time.
Multi-unit restaurant groups, grocery chains, and cold-storage operators get scheduled quarterly PMs at fixed pricing. Catches failure before it turns into a 3am call.
Active maintenance customers: typically within 2 hours, 24/7. New customers calling our emergency line during business hours usually see a tech within a few hours; after-hours calls usually see a tech that evening. We will give you a real ETA on the phone, not a window.
Highly dependent on size, panel thickness, refrigerant, and condensing unit location. A typical 8x10 restaurant walk-in cooler runs $14,000 to $24,000 installed. Larger or freezer installs run higher. We write line-item proposals so every component is visible.
Yes. We do the heat-load calculation, equipment sizing, refrigerant line design, and permit-ready specs for new builds and remodels. We also handle the cut-in for an existing build (panels through the kitchen, etc.).
Full commercial. Walk-ins, reach-ins, prep tables, ice machines, refrigerant line work, condenser racks, defrost controls. See commercial refrigeration overview for the full scope.
