Marsh Tide Appliance Service — independent Sub-Zero refrigeration repair in Ponte Vedra Beach, FL 32082 (St. Johns County). Call (904) 822-9883. # Sub-Zero refrigerator reset button: what to press and what it tells you A Sub-Zero refrigerator has no separate reset button: you reset it by turning it off at the panel or breaker, then on. What to check when that fails. Source: https://subzerorepairpontevedrabeach.com/journal/sub-zero-refrigerator-reset-button/ --- **Topic:** diagnosis. **What it costs** | Work | Typical range | | --- | --- | | Diagnostic visit | $80 flat, credited to the repair | | Electronic control board | $400–$820, parts and labour | | Evaporator or condenser fan motor | $250–$580, parts and labour | | Defrost heater, thermostat or sensor | $250–$640, parts and labour | Sub-Zero refrigerators do not have a dedicated reset button. To reset one, turn it off with the Power key on the control panel, or switch off its breaker, leave it off for about five minutes, and turn it back on. If the display stays dark, or the same warning is back within a day, the restart has worked as a test: a saved mode, a dirty condenser or a failed part is behind it. ## A proper power cycle, step by step 1. Press Power on the control panel. If the panel does not respond, use the breaker. 2. Wait around five minutes, so sealed-system pressure evens out and the compressor does not restart against a heavy load. 3. Restore power. Fans and the compressor can take a few minutes to start. 4. Keep the doors shut and allow a few hours before judging the temperature. A tripped breaker often rests in a middle position that looks nearly on. Push it fully off, then firmly back on. ## Settings that survive an outage on purpose Some modes are built to come back after a power cut, which can look like a fault. Sabbath Mode switches off the ice maker and the door alarm and keeps them off. It resumes when power returns, so no ice and no chime after a storm may simply mean the mode was left on. A PRO 36 or PRO 48 that was left in Showroom Mode also returns to it after a power failure. Cycling power again will not clear it; it is turned off from the password-protected Service screen inside the Settings menu. On a Classic (BI), Sh r on the display means Showroom Mode, and the unit will not cool at all. The way out: power the unit down, keep a matching Warmer and Colder key held, press Power once more, and only then lift your fingers off all three. Double dashes (--) where a temperature should be mean that zone has been disabled. Turn the unit off with Power, then hold that zone's Warmer key while you press Power again. ## Codes a restart can clear, and codes it cannot EC50 with Service flashing means the refrigerator compressor has been running for too long. If the readings are near normal, start with a condenser cleaning; after that, a 15-second press on the bell key (the door-ajar alarm) clears the code. If the compartment is already warm, skip the reset and book service. A flashing Vacuum Condenser message points the same way: the unit is running warm or working too hard, from a clogged condenser, a door that is not sealing, or a fault in the unit itself. Clean the condenser, then turn the refrigerator back on, which resets the message. EC40 with Service flashing, seen on models such as the 648PRO, means the freezer compressor is running too much. A door left ajar is the only cause an owner can fix; otherwise it is the sealed system, a fan or a temperature sensor. EE with Service or the wrench flashing means a temperature sensor, called a thermistor, has failed: the freezer one when EE sits on the left, the refrigerator one when it sits on the right. Sub-Zero gives owners no troubleshooting step for it. Holding ALARM and POWER at once, then letting go of both within 5 seconds, quiets a chiming Classic (BI) for 24 hours. It masks the fault; it fixes nothing. A flashing wrench with the chime means a major error was logged; a steady wrench means a minor fault that is not putting temperatures at risk. ## When the display stays dark Start at the wall. Sub-Zero calls for its Classic (CL) refrigerators to have a 115 VAC, 60 Hz supply on a dedicated 15 amp circuit with a grounded three-prong receptacle, and it does not recommend a GFCI, since one can cut the unit off. A unit on a GFCI or a shared circuit can lose power unnoticed. If the breaker holds and the circuit is live but nothing lights, the fault is usually inside: the [electronic control board](/services/built-in-refrigeration/), the display, or a connection between them. Summer thunderstorms around Ponte Vedra Beach bring short outages, and a surge as power snaps back can damage control electronics. Board replacement typically runs $400–$820; the firm figure follows an $80 diagnostic that rules out the wiring and the supply first. ## Keeping the food safe meanwhile By Sub-Zero's own figures, an empty refrigerator takes roughly 3 hours before the fresh-food side passes 45°F (7°C) and the freezer passes 20°F (-6°C), so open the doors as little as you can. A well-stocked freezer holds its cold longer than a sparse one. Frozen food that still shows ice crystals, or reads 40°F (4°C) or lower, can go back into the freezer, though texture may suffer. Never taste anything to decide whether it is safe. For a seasonal house, a planned shutdown avoids most of this; see [closing a house for the summer](/journal/closing-a-house-for-the-summer/). --- **Contact.** Marsh Tide Appliance Service, Ponte Vedra Beach, FL 32082. Phone (904) 822-9883. Monday – Friday 8:00am – 6:00pm; Saturday 9:00am – 4:00pm; Sunday Closed. The phone is the only channel — this site publishes no contact form and no email intake. **Affiliation.** Marsh Tide Appliance Service is an independent appliance repair company. We are not affiliated with, authorized by, or endorsed by Sub-Zero or its parent company. All brand names and model numbers are the property of their respective owners and are used only to identify the appliances we service. **Scope.** Built-in kitchen refrigeration only — the sealed systems inside a cabinet, not the climate system of the house. Not serviced: heating, furnaces and boilers; air conditioning, heat pumps and mini-splits; air handlers, ductwork and duct-mounted UV lamps; water heaters; laundry appliances; cooking appliances. Anything in the house climate system belongs to a licensed HVAC contractor, and we say so on the phone rather than send a van.