If the fans inside your walk-in keep running after the compressor stops, that observation alone does not mean the compressor has failed. On a Heatcraft intelliGen iRC installation, fan operation can continue during a normal off cycle. The useful question is whether the room has satisfied its cooling demand, or whether it is warming while cooling remains unavailable. Start with the accessible controller display, your temperature records, and any alarm message. If stored food is outside your establishment's approved limits, follow its corrective-action plan immediately. Do not postpone that response while trying to decide whether a fan sounds normal. Confirm which controller is running the walk-in This explanation follows the Heatcraft intelliGen iRC installation and operation manual, page 34 . It distinguishes an evaporator-only controller from a system controller connected to the condensing unit. Both describe an off cycle after cooling demand is satisfied, but their compressor-control arrangements differ. Check the equipment identification in your service records. A Heatcraft logo somewhere in the room does not confirm that this controller or this operating sequence is installed. Ask your service provider to identify the controller arrangement and the applicable manual. Record the evaporator and condensing-unit model numbers as separate items if they are already available in your equipment file. You can make that request without opening an electrical enclosure, climbing up to the evaporator, or changing a control. If the controller cannot be identified from accessible information, leave the operating-sequence question open until the provider confirms it. The room reaches temperature and the compressor stops The documented sequence closes the electronic expansion valve as the system enters pumpdown. In the evaporator-only arrangement, the low-pressure control stops the compressor. The system-controller sequence also includes controller pressure and elapsed-time conditions. Ask which arrangement the service report describes; the two are not interchangeable troubleshooting instructions. Evaporator fans can continue in the off cycle, governed by the Stir settings. Fan motion therefore does not prove that active compressor cooling is still underway. Look for the sequence in your records: the room approaches its normal operating temperature, the compressor stops, and the temperature remains controlled. That pattern is consistent with satisfied demand. It is different evidence from “the fans are running, but the room keeps getting warmer.” Neither observation, by itself, identifies the condition of the refrigerant charge. When temperature is controlled and there is no unresolved alarm, record what happened and compare it with the normal pattern your service provider has documented. If the fan behavior has changed since a recent service visit, ask whether a configuration change explains it. Do not adjust Stir settings merely to make the fans and compressor stop together. Cooling does not restart the instant the display changes The same manual describes a temperature differential and a minimum off time before a new cooling start, as well as a minimum run time once started, subject to protective shutdowns. Those features mean a single display reading is not enough to judge whether a restart is late. Write down the displayed temperature, operating mode, and time when you first notice the pause. Add the next observation rather than replacing the first one. Ask the technician to compare that timeline with the configured differential and timing for this installation. There is no universal waiting period in this article. An operator should not use a guessed delay to explain away an alarm or an unacceptable product temperature. Avoid repeated power resets or setpoint changes as an experiment; a before-and-after record is more useful when the operating conditions have not been changed repeatedly. If the display says defrost, check the installed defrost type Defrost is a separate operating state from satisfied-temperature pumpdown. The same iRC manual, page 35 , describes fans remaining on during air defrost and switching off during electric defrost. A fan observation that fits one arrangement therefore cannot confirm the other. Record the displayed mode and ask the provider which defrost type is installed. Include the time the display returns to cooling and the temperature trend afterward. Do not force a defrost, change its duration, or use another room's fan behavior as the expected sequence. If the recorded sequence does not match the site's documentation, send that mismatch with the service request. The fans run, but the room is getting warmer A normal off-cycle explanation is incomplete when your temperature log shows continued warming. Record whether there was a delivery, an unusually long door opening, or a recent service interruption. These are context for the investigation, not proof of the cause. Keep the alarm wording exactly as displayed rather than translating every message into “needs gas.” A useful service request would be: “Our iRC display showed this mode at 10:15. The fans were running, and these are the room readings before and after that time. We also photographed the alarm. Please check whether cooling was being requested and whether the installed controls allowed the compressor to run.” Replace those illustrative details with your actual observations. Ask the provider to connect the diagnosis to that evidence and to document the result after correction. “Compressor off” describes an observation; it does not distinguish satisfied demand, a control delay, or an unresolved service fault. Keep electrical testing, pressure measurements, and control changes with qualified service personnel. If refrigerant work is eventually proposed, use the equipment and refrigerant identification guide to organize the unit labels and service history. The iRC name identifies a controller, not the refrigerant or factory charge in your particular system. Then use the refrigerant service-record checklist to review the proposed scope. Fan behavior is not a reason to select a cylinder. Match the observation to the next action What you observe What it tells you Next action Temperature is controlled; fans continue after the compressor stops. A satisfied-demand off cycle is plausible on the documented iRC arrangement. Compare with the site's normal sequence; confirm unexpected changes with the provider. The temperature display changes, but cooling does not restart immediately. One reading cannot establish whether the configured restart conditions have been met. Save a timeline and ask for comparison with the installed differential and timing. The display shows defrost. Expected fan behavior depends on air versus electric defrost. Record the mode and return-to-cooling time; have the provider confirm the installed sequence. Temperature keeps rising or an alarm remains unresolved. Fan operation does not establish adequate refrigeration. Request service with the exact mode, alarm, and temperature record. Food is outside the establishment's approved limits. The product decision cannot wait for an equipment explanation. Follow the corrective-action plan and record the action taken.