Commercial Equipment Troubleshooting

Symptom-first guides for Puget Sound restaurants, grocers, and facility managers — what you can check safely, and when to call a licensed technician.

  • Commercial equipment only
  • Not residential DIY
  • EPA Universal certified service

Choose a category below, then open the guide that matches what you see on the line or in the walk-in. Each guide covers likely causes and limited safe first steps only.

Commercial Refrigeration

Walk-ins, reach-ins, ice machines, and prep tables — cold-side symptoms that threaten inventory.

  • Not cooling
  • Freezer icing
  • No ice
  • Water on floor
Browse refrigeration guides

Commercial Kitchen Equipment

Ovens, ranges, fryers, steamers, and dishwashers — hot-side problems that stop service.

  • Oven not heating
  • Pilot out
  • Fryer tripping
  • Low wash temp
Browse kitchen guides

Commercial HVAC

Rooftop units and packaged systems — comfort and airflow problems in commercial buildings.

  • RTU not cooling
  • High-pressure trip
  • Economizer fault
  • Compressor won’t start
Browse HVAC guides
Stop now — do not troubleshoot further If any of the following apply, stop reading and act on safety first. Do not reset safety devices, bypass limits, or open gas or refrigerant lines.
  • Gas odor or suspected leak — leave the area; do not operate switches, pilots, or electrical equipment; call your gas utility or 911, then a licensed gas technician.
  • Fire, smoke, flames, or grease fire — use your site fire plan; call 911 if needed; do not restart equipment until inspected.
  • Carbon monoxide alarm or headache/nausea near gas equipment — ventilate, evacuate, and call for service.
  • Repeated high-limit, pressure, or breaker trips — one reset is not a fix; continued operation can damage equipment or cause injury.
  • Refrigerant hiss, oil stain, or suspected leak — EPA-certified technicians only; do not add refrigerant or braze lines yourself.
  • Sparking, burning smell, or exposed live conductors — shut off at a labeled disconnect if safe to reach; call a licensed technician.

Important: These guides are general information for commercial operators, not step-by-step repair instructions for untrained persons. You are responsible for following manufacturer manuals, local codes, and your insurer’s requirements. A/C Dr. Naz is not liable for injury, property damage, food loss, or code violations that result from actions taken based on this content. When in doubt, call a licensed professional.

Caution Power off at the labeled disconnect before cleaning condenser coils or reaching inside panels. Where a guide allows a single control reset, try it once only — if the fault returns, stop and schedule service.
Safe checks Thermostat setting, doors closed, visible gasket damage, ice blocking airflow, and breaker position — visual checks only, with equipment left in its normal off or on state as noted.

Equipment still down after safe checks?

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