Cold Line Refrigeration Service — (904) 604-7755 # EC50, EC40 and EE Service Codes | Cold Line Notes What EC50, EC40 and EE mean, which cabinets show them, and why clearing a code before the technician arrives costs you diagnostic information. Source: https://firstcoastsubzero.com/notes/service-codes/ --- Setpoints 38°F Fresh food 5°F Ice production 0°F Freezer Service note · error codes · diagnosis # Service codes — read them, do not clear them A stored code tells a technician when the fault started and how the control responded. Clearing it before the visit throws that away, and sometimes costs a second visit. Published March 3, 2026 Reviewed August 14, 2026 Independent service company ![A multimeter face up on a folded towel, its probe leads running out of the frame.](https://firstcoastsubzero.com/img/tools-flatlay-06.webp) A code narrows the search. The meter is what ends it. Applies to - Classic (CL) - Built-In (BI) - 600 Series - 700 Series - 648PRO - IC-27 Start with the instruction that matters most: if your cabinet is showing a code and a technician is coming, leave it showing. A code is not just a label for a symptom. It carries timing. It tells us when the excursion began, how long it ran, and how the control responded. On a cabinet with two independent sealed systems that information frequently identifies which circuit failed before a single panel comes off. Cleared, it is gone, and we start from a thermometer reading and a customer’s recollection. ## EC50 and the flashing SERVICE indicator EC50 appears with a flashing SERVICE indicator on the current and recent built-in cabinets. It is the code most homeowners meet. The intended sequence is straightforward. Clean the condenser. Wait for compartment temperatures to come back near normal. Then, and only then, clear the code by holding the door-ajar alarm key for fifteen seconds. Two parts of that get skipped. People clear the code first and clean afterwards, which produces a cabinet that simply raises it again. And people clear it while the compartments are still warm, which tells the control that a fault it is actively observing has been dealt with. If temperatures are not back at setpoint 24 hours after the cleaning, do not clear anything. Book the visit and leave the display alone. ## EC40 and the ten-degree split EC40 reports excessive freezer compressor run time. It appears on the 600 Series, the 648PRO, the 700 Series and the IC-27. The published guidance contains the most useful troubleshooting rule in the legacy range, and it is a temperature split: If the freezer compartment is less than ten degrees above setpoint, treat it as a restricted condenser. Clean it and re-check. If the freezer compartment is more than ten degrees above setpoint, and no door has been left standing open, the cabinet needs a technician rather than a vacuum cleaner. That single threshold separates a maintenance job from a component or sealed-system failure, and it does so before anybody spends money. It is worth checking the door first, honestly — a freezer drawer left ajar overnight generates exactly this code and no fault at all. ## EE on the 600 Series If a 600 Series cabinet displays EE, the manufacturer’s own published position is that there is no consumer troubleshooting for it. We repeat that as stated rather than dressing it up. There is no sequence of button presses, no reset, and no condenser cleaning that addresses EE. It is a service code in the literal sense. Leave it showing and book the visit. ## Why “do not clear it” is not an upsell It would be easy to read this as a service company protecting its own diagnostic time. The opposite is closer to true: a cleared code frequently means a longer visit, or a second one, and neither of those is good for anybody. The concrete case is a cabinet with two sealed systems and an intermittent fault on one of them. A stored code with timing tells us the excursion happened at 3am on three consecutive nights, which points hard at a defrost cycle. Without it we have a cabinet that is currently at setpoint, an owner who is certain something is wrong, and no evidence. That is how intermittent faults turn into repeat visits. ## What to write down before you call The code, exactly as displayed. Both compartment temperatures from an independent thermometer, left in place for two hours. Both setpoints. Whether a door has been left open recently. Whether the condenser has been cleaned, and when. Five pieces of information, and the first one is free if nobody has pressed anything. ## What we will not tell you We do not publish control-board part numbers as definitive on any series. Board fit is serial-dependent and the wrong board is money spent twice. If a code points at a control, the serial comes off the plate at the visit and the part is identified from that. Do not Do not clear a code before the technician arrives. The stored code is diagnostic evidence and on a two-circuit cabinet it frequently identifies the failed system. If a 600 Series cabinet displays EE, there is no consumer troubleshooting for it. Leave it showing and book the visit. Related repairs - [Built-in refrigerator](https://firstcoastsubzero.com/repairs/built-in-refrigerator/) - [Freezer column](https://firstcoastsubzero.com/repairs/freezer-column/) - [Ice maker](https://firstcoastsubzero.com/repairs/ice-maker/) Series affected - [600 / 700 Series](https://firstcoastsubzero.com/models/legacy-600-700/) - [Integrated (IT / IC)](https://firstcoastsubzero.com/models/legacy-integrated/) - [PRO series](https://firstcoastsubzero.com/models/pro/) - [Classic (CL)](https://firstcoastsubzero.com/models/classic/) More on this topic - [Storms, outages and the control board that fails three weeks later](https://firstcoastsubzero.com/notes/storm-power-events/) - [Why an ice maker stops, in the order we check it](https://firstcoastsubzero.com/notes/ice-maker-diagnosis/) - [Condenser cleaning, and the 48°F rule](https://firstcoastsubzero.com/notes/condenser-cleaning/) - [Two sealed systems, not one](https://firstcoastsubzero.com/notes/dual-refrigeration/) Reference ## Questions we are asked - Can I clear EC50 myself after cleaning the condenser?: Yes, once compartment temperatures are back near normal, by holding the door-ajar alarm key for fifteen seconds. If a technician is already booked, leave it showing instead. - What does EC40 mean?: Excessive freezer compressor run time. Under ten degrees above setpoint, clean the condenser. Over ten degrees above setpoint with no door left open, the cabinet needs service. Independent service company ## If the measurement says call, call $80 flat diagnostic, credited toward the repair. Written estimate before any part is ordered or any work begins. We record any stored service code as found, which is why we ask that it is left in place until the visit. Mon–Fri 8am–6pm · Sat 9am–4pm · Sun closed. Scheduled appointments only. No after-hours or emergency service. [Call (904) 604-7755](tel:+19046047755) [Book online](https://nexfield.pro/crm/book?u=44) [Contact](https://firstcoastsubzero.com/contact/) 40 miles by road from Fruit Cove and St. Johns County. Drive distance, not straight-line radius. 90 days labor, 365 days parts, genuine OEM components. EPA Section 608 certified technicians — the federal requirement to open a sealed refrigeration system.