Commercial Refrigeration Repair Across the NYC Metro

Usually a low refrigerant charge from a slow leak, a TXV stuck or hunting, a fouled or iced evaporator, or a choked condenser coil. We run superheat and subcooling diagnostics and check airflow before adding refrigerant, so we fix the cause instead of masking a leak that comes back next week.

Almost always a defrost failure — a dead defrost timer or control, a burned-out defrost heater, or a failed termination/fan-delay thermostat that won't end or initiate the defrost cycle. We isolate the defrost circuit, restore proper defrost timing, and clear the coil so it can transfer heat again.

Points to low charge, a failing start component or contactor, a tripping low-pressure or oil-failure control, or a compressor losing efficiency. We meter electrical signatures and pressures and verify the safety is protecting the compressor, not nuisance-tripping, before condemning anything.

Typically a clogged condensate drain or failed drain-line heater, a worn door gasket, or failed anti-sweat/perimeter heaters letting humid air condense and freeze at the opening. We clear the drain, replace gaskets and heaters, and stop the moisture at its source.

On parallel rack systems this is often a stuck or failed EPR/evaporator-pressure-regulator, a case-controller or EEV fault, a plugged liquid-line drier, or a satellite compressor down. We isolate the affected circuit on the rack rather than chasing a whole-system problem.

Repeated compressor loss or oil-failure lockouts usually trace to an oil-management problem — a failed oil-level control or oil regulator, oil logging in the suction header, or refrigerant flooding back. We correct oil return and management so the next compressor doesn't fail the same way.