--- title: "Scotsman code 4: high discharge temperature or pressure control open" description: "What 4 means on Scotsman code 4: high discharge temperature or pressure control opens, what to check before booking, and when it is not a failure at all." url: "https://icemachinerepair.center/error-codes/scotsman-4/" --- # Scotsman code 4: high discharge temperature or pressure control open On a Prodigy cuber, the controller watches discharge temperature and stops at 250 °F. ## What 4 actually means. On a Prodigy cuber, the controller watches discharge temperature and stops at 250 °F. On a CM3 nugget or flake machine, 4 means a pressure control opened. Both usually trace to a condenser that cannot shed heat: a clogged filter, a dirty coil, a failed fan, hot air being drawn back in, or on remote systems, a low charge. Scotsman ice machine display What to do when 4 shows on the ice machine ### Kind of code Condenser and airflow The machine could not shed its heat. An air filter packed with lint, a condenser coil furred with grease and dust, a fan motor that no longer spins, a machine pushed into a hot corner without its clearance, a water-cooled condenser whose regulating valve starves it, or a remote condenser on a roof blocked by leaves all show up here. Washing the air filter and freeing the space around the machine clears many cases; a fan motor or a valve means a visit. ### Usually leads to Ice machine condenser and fan repair Air-cooled coils, fan motors and filters, water-cooled regulating valves and rooftop remote condensers, cleaned or repaired so the ice machine can shed its heat. ### Shows up as Ice Machine Error Code or Flashing Light: What It Is Telling You An ice machine error code may show as a number on a small display, a pattern of blinking lights on the control board, a colored light on the front, or a machine that stops with one indicator flashing. ### Make Scotsman A Scotsman visit sorts out which kind of ice the machine makes, because each kind follows a different service path. ### Source Scotsman Prodigy ELITE modular cuber service manual, MC0322 through MC2148 (January 2022) Prodigy and Prodigy ELITE cubers (MC and C models) show one character in the code display next to the lights. Prodigy flaked and nugget machines with the CM3 control (N and F models) use the same display with a different code list. ELITE maximum discharge temperature: 250 °F. ## Before you book, in this order. Each step comes from Scotsman's own guidance for 4 on its ice machines. Follow it to the end: the last card says whether this is a visit. 01 Clean the condenser air filter and give the machine room to breathe on all vented sides. 02 Make sure it is not pulling in hot air from an oven, dishroom or its own exhaust. 03 If 4 returns after the airflow is clear, turn the machine off and book a visit. ### Still there? It usually turns into [ice machine condenser and fan repair](https://icemachinerepair.center/services/ice-machine-condenser-and-fan-repair/). Book with the code and the model number. ### What not to do 4 is not a water problem, which is 3, and it does not come from the temperature sensor itself failing, which is 7. ## What you may notice with it. The ice machine problems 4 tends to arrive with. Answer these at the ice machine before anyone is booked. [All problems](https://icemachinerepair.center/problems/) Before you call ### [Ice Machine Error Code or Flashing Light: What It Is Telling You](https://icemachinerepair.center/problems/ice-machine-error-code/) [All 7 causes, cheapest first](https://icemachinerepair.center/problems/ice-machine-error-code/) It also comes with - [**Ice Machine Running but Not Making Ice**](https://icemachinerepair.center/problems/ice-machine-not-making-ice/) - [**Ice Machine Making Too Little Ice for the Rush**](https://icemachinerepair.center/problems/ice-machine-making-little-ice/) - [**Ice Machine Loud: Grinding, Rattling or Banging**](https://icemachinerepair.center/problems/ice-machine-loud-noise/) Problem ### Ice Machine Error Code or Flashing Light: What It Is Telling You 7 causes, cheapest first Where 4 usually leads ## Ice machine condenser and fan repair. **Condenser cleaning, fan motor, water regulating valve or remote condenser work · low to moderate.** Book a visit [What the job involves](https://icemachinerepair.center/services/ice-machine-condenser-and-fan-repair/) ## Scotsman ice machines. A Scotsman visit sorts out which kind of ice the machine makes, because each kind follows a different service path. [Scotsman ice machine repair](https://icemachinerepair.center/brands/scotsman/) More Scotsman codes [1](https://icemachinerepair.center/error-codes/scotsman-1/) [2](https://icemachinerepair.center/error-codes/scotsman-2/) [3](https://icemachinerepair.center/error-codes/scotsman-3/) [5](https://icemachinerepair.center/error-codes/scotsman-5/) [7](https://icemachinerepair.center/error-codes/scotsman-7/) [8](https://icemachinerepair.center/error-codes/scotsman-8/) [E](https://icemachinerepair.center/error-codes/scotsman-e/) [b](https://icemachinerepair.center/error-codes/scotsman-b/) [P](https://icemachinerepair.center/error-codes/scotsman-p/) [Water light blinking red](https://icemachinerepair.center/error-codes/scotsman-water-light/) Condenser and airflow on other makes [Atosa E4](https://icemachinerepair.center/error-codes/atosa-e4/) [Blue Air E02](https://icemachinerepair.center/error-codes/blue-air-e02/) [Follett HI PRESSURE](https://icemachinerepair.center/error-codes/follett-hi-pressure/) [Hoshizaki 4 beeps](https://icemachinerepair.center/error-codes/hoshizaki-4-beeps/) [Manitowoc E04](https://icemachinerepair.center/error-codes/manitowoc-e04/) [True Residential E6](https://icemachinerepair.center/error-codes/true-e6/) [All 11 codes of this kind](https://icemachinerepair.center/error-codes/#family-condenser) Scotsman builds this ### Modular ice machine An ice-making head set on top of a separate storage bin or drink dispenser, cooled by air, water or a condenser on the roof, turning out hundreds of pounds of cubes a day. Scotsman builds this ### Undercounter ice machine A self-contained ice machine that makes and stores its own ice under a bar, a service counter or a kitchen island, from commercial units to clear-ice models in large homes. Scotsman builds this ### Nugget ice machine An ice machine that freezes a thin layer inside a chilled cylinder and pushes it out with an auger as soft, chewable nuggets, for clinics, offices, hotels and large homes. ## In Scotsman's own words > High Discharge Temp [Scotsman Prodigy ELITE modular cuber service manual, MC0322 through MC2148 (January 2022)](https://www.scotsman-ice.com/service/Service%20Manuals/ProdigyELITECuberServiceManual.pdf) [Scotsman Prodigy ELITE modular cuber service manual, MC0322 through MC2148 (January 2022)](https://www.scotsman-ice.com/service/Service%20Manuals/ProdigyELITECuberServiceManual.pdf) [Scotsman CM3 control system update, Prodigy flaked and nugget ice machines technical review (291-839)](https://www.scotsman-ice.com/service/Technical%20Review/291-839.pdf) [Scotsman Technical Update: Prodigy cuber code diagnostics (August 2010)](https://www.scotsman-ice.com/documents/GetDocument.aspx?Key=04da949b-e9cb-4d12-b945-bd86662f2e46) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Prodigy and Prodigy ELITE cubers (MC and C models) show one character in the code display next to the lights. Prodigy flaked and nugget machines with the CM3 control (N and F models) use the same display with a different code list. ELITE maximum discharge temperature: 250 °F. ## Scotsman 4 ice machine repair, where we come out. The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered. 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Clean the condenser air filter and give the machine room to breathe on all vented sides. If it comes back, it needs a visit. ### Why does my Scotsman show 4 only in summer? The condenser rejects heat into the room air. When the room is hot and the filter is dusty, discharge temperature climbs past the limit. Better airflow often solves it. ### Can I clean the condenser on my Scotsman myself? The removable air filter, yes. Brushing the coil behind it and checking the fan means working inside the cabinet, which is a visit. ### Is code 4 on a Scotsman a sign of a leak? On remote systems Scotsman lists low charge as a cause. On R290 machines, any gas smell or hiss means leaving the room and keeping switches off. --- **[Read on the site: Scotsman code 4: high discharge temperature or pressure control open](https://icemachinerepair.center/error-codes/scotsman-4/)** **[Book a visit with IceMachineRepair.center](https://icemachinerepair.center/schedule/)**