Kold-Draft Error Codes & Troubleshooting Guide
Kold-Draft reference for control board error codes 10-90, probe diagnostics, and ice-quality troubleshooting.
Kold-Draft is an Ali Group brand (acquired April 2021), alongside Scotsman and Ice-O-Matic. Headquartered in Erie, PA.
Premium Equipment Notice
Kold-Draft machines use inverted copper evaporators, liquid level probes, and evaporator temperature probes rather than thermostats or timers. For model-specific access, service, warranty, and maintenance details, consult the current Kold-Draft manufacturer manual.
Kold-Draft Error Code Quick Reference
Kold-Draft displays two-digit error codes on the control board. Identify your code below, then scroll down for detailed diagnostics and repair guidance.
| Code | Meaning | Severity | Est. Repair |
|---|---|---|---|
| 10 | Evaporator temp over 120F | High | $200-$500 |
| 20 | Water plate fails to close after 3 attempts | High | $250-$500 |
| 30 | Freeze cycle exceeded time limit (45-60+ min) | Most Common | $200-$450 |
| 40 | Freeze time under 5 min for 3 consecutive cycles | Medium | $200-$450 |
| 50 | Harvest exceeds 20 minutes | High | $200-$500 |
| 60 | Water fill exceeds time limit (3-5 min) | Medium | $100-$300 |
| 70 | Evap temp below 31F (Rev 1.1/1.2) or both arm switches closed (Rev 1.3) | Varies | $150-$400 |
| 80 | Full-rinse mode (Rev 1.3 only) | Normal | N/A |
| 90 | Bin full (Rev 1.3 only) | Normal* | $0-$200 |
* Code 90 is normal when bin is actually full. If bin is not full, check bin probe and wiring.
Error 10: Evaporator Over-Temperature
Evaporator temperature probe reading exceeds 120F
High Severity: An evaporator reading over 120F indicates a serious malfunction. The machine shuts down to protect components. Professional diagnosis is required.
Common Causes
Bad Evaporator Temperature Probe
Probe misalignment can produce false readings; consult the current Kold-Draft manufacturer manual for model-specific checks.
Stuck Hot Gas Valve
Hot gas solenoid valve stuck open, flooding evaporator with hot refrigerant
Faulty Control Board
Board misreading probe signal or sending incorrect commands
Professional Solutions
Verify Probe Reading (Pro)
The evaporator temperature probe may be giving false readings or misaligned. A technician will test it with a multimeter and compare actual vs. reported temperature. Requires professional diagnosis.
Inspect Hot Gas Valve (Pro)
The hot gas solenoid valve may be stuck open. A technician will verify it closes during the freeze cycle and replace it if needed. Requires professional diagnosis.
Board Diagnostics (Pro)
The control board may be misreading the probe signal. A technician will test board inputs and outputs and replace the board if faulty. Requires professional diagnosis.
Error 20: Water Plate Closure Failure
Water plate fails to close after 3 consecutive attempts
Mechanical Issue: The water plate must seal tightly against the inverted evaporator for proper ice formation. This error typically involves worn mechanical components.
Common Causes
Broken Cam Arm or Springs
Cam arms and springs are among the most commonly replaced parts; they actuate the water plate open/close cycle
Worn Silicone Coating
The silicone coating on the water plate wears over time, causing ice to stick and block plate closure
Ice Over-Freezing on Water Plate
If the water level probe is set too low, ice over-freezes and physically prevents the plate from closing
Actuator Motor Failure
The actuator motor that raises/lowers the water plate has worn out or lost torque
Professional Solutions
Inspect Cam and Springs (Pro)
Check cam arms for cracks or wear. Replace springs if stretched. These are high-wear components.
Check Water Level Probe (Pro)
The water level probe may be set incorrectly, causing over-freezing. Properly set cubes have a small, pea-sized dimple. Probe adjustment requires professional service.
Resurface or Replace Water Plate (Pro)
If silicone coating is worn, the plate needs resurfacing or replacement to prevent ice adhesion.
Error 30: Freeze Cycle Timeout
Freeze cycle exceeded time limit (typically 45-60+ minutes)
Most Common Error: Error 30 is the code seen most frequently. In Houston's heat, dirty condensers and high ambient temperatures are leading triggers.
Common Causes
Low Refrigerant Charge
Refrigerant leak reducing cooling capacity (requires professional service)
Dirty Condenser Coils
Dust, grease, and debris blocking airflow — especially common in Houston kitchens
Scale Buildup on Evaporator
Water quality and mineral buildup vary by model and installation; use current model documentation for applicable requirements.
High Ambient Temperature
Kitchen temps over 90F significantly extend freeze times — Houston summers are brutal
Water Temperature Below 45F
Incoming water must be at least 45F; cold water disrupts the freeze-and-drain cycle
Troubleshooting Steps
Observe External Conditions
Without opening the cabinet, note visible airflow obstruction, unusual noise, leaks, or heat around the machine.
Follow the Current Manual
Use only model-specific operator-authorized checks in the current Kold-Draft manual or product label.
Do Not Access Internal Systems
Do not perform internal cleaning, probe access, or refrigeration work from this page.
Arrange Qualified Service
Record the code, model, serial information, and observations for qualified service diagnosis.
Need Help With Your Kold-Draft?
Requests are received and reviewed for possible routing; a request may be routed to an independent provider, subject to provider acceptance. No response or service is guaranteed.
Error 40: Rapid Freeze Cycle (Slushing)
Freeze time under 5 minutes for 3 consecutive cycles
Probe Issue Likely: If the machine thinks ice is forming in under 5 minutes, the evaporator probe is likely reading incorrectly or ice is slushing (forming soft/incomplete cubes).
Common Causes
Slushing (Soft Ice)
Water is freezing too quickly or incompletely, producing slush instead of solid cubes
Evaporator Probe Misalignment
Probe shifted out of position, giving false temperature readings that trigger premature harvest
Liquid Level Probe Issue
Continuity-based liquid level probe falsely detecting ice completion
Professional Solutions
Qualified Probe Diagnosis
Do not reposition, clean, or test probes from this page. Qualified service should follow the current model manual.
Qualified Harvest Diagnosis
Harvest components and controls require qualified service using current model-specific documentation.
Refrigeration Service
Do not assess or access refrigerant systems from this page; arrange qualified service.
Error 50: Harvest Timeout
Harvest cycle exceeds 20 minutes
Harvest Failure: The machine formed ice but cannot release it from the evaporator within the allotted time. This involves the hot gas valve and evaporator probe.
Common Causes
Evaporator Probe Reading Too Warm
Probe not detecting the temperature drop needed to confirm harvest; may be broken or misaligned
Hot Gas Valve Won't Open
Solenoid valve stuck closed — hot gas can't reach evaporator to release ice
Scale Preventing Ice Release
Heavy mineral deposits causing ice to adhere to Electrotin-plated copper cells
Professional Solutions
Test Evaporator Probe (Pro)
The evaporator probe may be misaligned or broken. Testing and replacement should follow the current Kold-Draft manufacturer manual.
Check Hot Gas Valve (Pro)
The hot gas solenoid valve may be stuck closed. A technician will verify it opens during the harvest cycle and replace it if needed. Requires professional diagnosis.
Qualified Evaporator Service
Scale or harvest concerns require qualified service following the current model manual and product-label instructions.
Error 60: Water Fill Timeout
Water fill cycle exceeds time limit (3-5 minutes)
Water Supply Issue: The machine cannot fill with water fast enough. This is often the easiest error to diagnose and sometimes resolve without a technician.
Common Causes
Water Supply Turned Off
Supply valve closed or building water shut off
Clogged Water Filter
Overdue filter restricting flow — especially common with Houston hard water
Bad Water Solenoid Valve
Inlet solenoid valve stuck closed or not receiving signal to open
Low Water Pressure
Water pressure requirements vary by model. Follow the current manual and arrange qualified service for pressure diagnosis or regulation.
Troubleshooting Steps
Observe External Water Conditions
Without opening the cabinet, note whether the external supply is on and whether visible lines show leaks or kinks.
Use Model-Specific Guidance
Follow only external, operator-authorized checks in the current Kold-Draft manual or product label.
Record Details
Record the code, model, serial information, and visible water-supply symptoms.
Arrange Qualified Service
Internal filters, valves, pressure, and controls require qualified diagnosis.
Error 70: Firmware-Dependent Error
Meaning varies by control board revision
Identify Your Firmware Revision: Error 70 means different things depending on your control board version (Rev 1.1, 1.2, or 1.3). Record your model and serial number and contact qualified service to confirm the board revision.
Rev 1.1 / Rev 1.2
Evaporator Temp Below 31F
The evaporator temperature probe is reading below 31F during a period when it shouldn't be. Could indicate a stuck probe, wiring issue, or refrigeration problem.
Rev 1.3
Both Arm Switches Closed Simultaneously
Both water plate arm switches are registering closed at the same time, which is physically contradictory. This usually indicates arm switch alignment, wiring, or a failed switch and requires professional diagnosis.
Error 80 & 90: Status Codes (Rev 1.3 Only)
Normal operational status indicators on newer firmware
Code 80: Full-Rinse Mode
This is a normal operation indicator on Rev 1.3 boards. The machine is in its full-rinse cycle — flushing the water system. No action needed; allow the cycle to complete.
Normal OperationCode 90: Bin Full
Normal if the bin is actually full of ice. The bin probe detects ice level and pauses production. If the bin is NOT full, record the code and contact qualified service — the bin probe, its position, and wiring require professional diagnosis. A faulty bin probe can cause the machine to stop making ice prematurely.
Normal* (check if bin empty)No Ice Production (No Error Code Displayed)
Machine appears to run but produces no ice, and no error code is showing
Read the Display First: If an error code IS displayed, refer to the error code sections above. If no code is showing, use these general observation steps.
Common Causes
Water Supply Issue
External water-supply conditions vary by model; follow the current manual and use qualified service for pressure or valve diagnosis.
Water Pump Failure
Pumps have a 5-7 year lifespan. If the pump isn't pushing water up through the plate cells, no ice forms.
Scale on Evaporator Cells
Water quality and evaporator conditions vary by model and installation; use current documentation for maintenance guidance.
Probe Misalignment
A shifted evaporator or liquid-level probe can affect readings; consult the current Kold-Draft manufacturer manual for model-specific checks.
Refrigerant Problem
Leak or charge issue preventing proper freezing (requires professional service)
What You Can Check
Observe External Supply
Without opening the cabinet, note whether the external water supply is on and whether visible lines show leaks or kinks.
Note External Operation
Listen for unusual operating noise and note visible leaks or drainage issues without opening panels.
Follow Current Manual
Use only external, operator-authorized checks in the current Kold-Draft manual or product label.
Record and Refer
Record the model, serial information, and observations; arrange qualified service for internal faults.
Call a pro: If basic checks don't resolve, professional service is needed. Probe realignment, pump replacement, or refrigerant work requires professional diagnosis.
Cloudy Ice Cubes
Ice is white or cloudy rather than clear.
Quality Reference: Cloudy cubes can indicate an issue with the water system, pump, or evaporator. Consult the current Kold-Draft manufacturer manual for model-specific checks.
Common Causes
Water or Evaporator Condition
Water quality, flow, evaporator, or drainage conditions may vary by model and installation.
Pump or Refrigeration Condition
Pump, refrigeration, or control faults require qualified diagnosis.
Model-Specific Maintenance
Use the current model manual and product label for any maintenance or water-quality requirements.
What You Can Check
Record Visible Conditions
Record ice appearance, model, serial information, and any visible leaks or unusual noise without opening panels.
Use Current Product Guidance
Follow the current model manual and product label for water, filter, and maintenance instructions.
Arrange Qualified Service
Do not apply chemicals, access internal parts, or infer water chemistry from this page; use qualified service.
Qualified service: Internal cleaning, pump, drain, or evaporator work requires current model documentation and qualified service.
How Kold-Draft Forms Ice
The Inverted Evaporator Process
Inverted Copper Evaporator
Kold-Draft uses an upside-down horizontal evaporator positioned atop a molded water plate. The evaporator is solid copper with Electrotin plating for antimicrobial protection.
Upward Water Injection
Water is vigorously pumped upward through a dedicated hole in the water plate for each individual cell. This is not a cascade — it's direct injection per cell.
Mineral Separation
Pure water freezes first on the cold cell surfaces. Mineral-laden water drains through two drain holes beneath each cell, carrying impurities away.
Probe-Based Harvest
No thermostat or timer controls harvest. A liquid level probe (continuity-based) and evaporator temperature probe trigger harvest at approximately 26.5F.
Houston-Specific Challenges
Water Quality and Scale
Water quality effects vary by model and installation; follow the current manual and product label.
High Humidity
Puts extra load on the refrigeration system, extending freeze cycles
Summer Heat
Ambient temps over 90F reduce ice production capacity and trigger Error 30
Model-Specific Over-Freezing Guidance
Record the code, model, serial information, cube appearance, and other safe external observations. Do not adjust probes or access internal components from this page. Follow the current model manual and arrange qualified service for probe, plate, or control diagnosis.
Current Kold-Draft Model Lineup
Model access and service requirements vary; consult current Kold-Draft documentation before opening or servicing equipment.
KD Cocktail Series (1" x 1" x 1-1/4" cubes)
| Model | Type | Capacity |
|---|---|---|
| KD-50 | Undercounter | 50 lbs/day |
| KD-70 | Undercounter | 70 lbs/day |
| KD-110 | Undercounter | 110 lbs/day |
Full Cube Series (1-1/4" x 1-1/4" x 1-1/4" cubes)
| Model | Type | Capacity |
|---|---|---|
| SC200 | Undercounter | 200 lbs/day |
| GTX360 | Stackable | 300 lbs/day |
| GTX560 | Stackable | 500 lbs/day |
| GBX560 | Stackable | 500 lbs/day |
| GBX1060 | Stackable | 1,000 lbs/day |
Water Quality & Cleaning Requirements
Model-Specific Water Guidance
Water specifications, filtration, and maintenance requirements vary by model and installation. Use the current Kold-Draft manual and product label for applicable requirements; do not infer pressure, temperature, mineral, or chemical limits from this page.
Cleaning and Sanitizing
Follow only the current model manual and product label for cleaner identity, concentration, mode, contact time, rinsing, sanitizing, drainage, and maintenance timing. This page provides no chemical formula, circulation sequence, or fixed schedule. Use qualified service when instructions are unclear or internal access is required.
Most Commonly Replaced Kold-Draft Parts
Common components that may require attention over time.
Water Pumps
Service intervals and component condition vary by model, installation, and use; qualified service should evaluate replacement needs.
Evaporator Probes
Probe misalignment is one possible diagnostic consideration.
Bin Probes
Faulty bin probes trigger false Code 90.
Solenoid Valves
Water inlet and hot gas solenoids.
Actuator Motors
Raise/lower the water plate.
Cam Arms & Springs
Cause Error 20 when worn.
Kold-Draft Service Request Information
Requests are received and reviewed for possible routing to an independent provider, subject to provider acceptance.
Kold-Draft Service Request Information
If your Kold-Draft machine continues showing the same symptoms after the manufacturer-recommended checks, consider qualified service. A request may be routed to an independent provider, subject to provider acceptance. No response or service is guaranteed.
Requests are received and reviewed for possible routing. No response or service is guaranteed.
Request Kold-Draft Service
Requests are received and reviewed for possible routing to an independent provider; no response or service is guaranteed.