Kolpak Walk-In Cooler Error Code HIGH MONITOR TEMP3 ALARM: Temp 3 Above Offset
HIGH MONITOR TEMP3 ALARM means Temp 3 is above the High Temp Alarm Offset for longer than the High Temp Alarm Delay. The third monitored spot is too warm. Scroll the Alarms & Variables menu to confirm, and measure that area with a thermometer.
Medium: a monitored area is above its high alarm point, and product there may be at risk.
- Code
- HIGH MONITOR TEMP3 ALARM
- Maker
- Kolpak
- Equipment
- Walk-in coolers & freezers
- Applies to
- ArcticFox Deluxe Display, stand-alone
What does Kolpak HIGH MONITOR TEMP3 ALARM mean?
The stand-alone Display watches Temp 3 against a high limit set by the High Temp Alarm Offset. A reading over that point starts the High Temp Alarm Delay. If the reading is still high when the delay is over, the text alarm HIGH MONITOR TEMP3 ALARM appears in the Alarms & Variables menu. A short warm period, like a door open during unloading, is allowed to pass. This is a temperature alarm, so it means the Display has a believable reading. The manual does not list causes and does not say what Temp 3 monitors, which depends on the installation. It points to the Alarms & Variables menu for viewing active alarms and lists a DISP CLEAR ALARM variable to clear alarms set in the Display. Clearing does not cool the area, so the alarm returns if the cause is still there.
Affected models and control systems
ArcticFox Deluxe Display, stand-alone, on Kolpak walk-ins. The manual lists this alarm in the Alarms & Variables menu on page 9 of the stand-alone section.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- HIGH MONITOR TEMP3 ALARM in the Alarms & Variables menu
- Alarm indication on the Display
- Temp 3 reading above normal
- Warm product or air near the monitored spot
Possible causes
Likely causes — what usually sits behind HIGH MONITOR TEMP3 ALARM on this control. A technician confirms which one it is before any part is replaced.
- Watched area warming from door traffic, load or weak cooling
- Temp 3 sensor placed near warm air or equipment
- High Temp Alarm Offset set tightly for the use of the room
- Alarm delay too short for normal loading
Safe checks before calling for service
- Scroll the Alarms & Variables menu to confirm the alarm and note Temp 3.
- Check the monitored spot with a thermometer.
- Close the door, and clear blocked airflow.
- Report the display value and thermometer reading to the technician.
How a technician diagnoses HIGH MONITOR TEMP3 ALARM
- Read the High Temp Alarm Offset and High Temp Alarm Delay.
- Compare Temp 3 with a thermometer.
- Check cooling, defrost and door seal.
- Review where the sensor sits.
- Correct the cause, clear the alarm and watch for return.
- Cooling diagnosis uses refrigerant gauges.
- Offset and delay are programmed values tied to the room design.
- Sensor testing puts a meter on live inputs.
Technical reference
- Document
- ArcticFox Deluxe Display - Original Instructions, Installation, Operation and Maintenance Manual
- Edition
- Part No. 500002385-4, 5/23
- Models / control
- ArcticFox Deluxe Display, stand-alone
- Section
- Deluxe Display - Stand Alone - Alarms & Variables Menu, p.9
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related Kolpak walk-in cooler & freezer error codes
Is this alarm the same as HIGH MONITOR TEMP3?
Same idea, different controller. That name is for the OEM controller with Display. This one is for the stand-alone Display.
Why does it not alarm instantly?
The Display waits for the High Temp Alarm Delay to ride out short warm periods.
Is the food safe?
Check the real temperature with a thermometer and apply your own food safety rules.
Need help with Kolpak HIGH MONITOR TEMP3 ALARM?
A technician confirms the cause on site and gives you the price in writing before any work starts.