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Error Code

U-Line Blast Chiller HIGH PRESSURE Error Code

Request U-Line Service (310) 879-5776
Clara Bennett Written by Clara Bennett Appliance Care Editor Published October 20, 2026

Content status: Verified

Error code HIGH PRESSURE
Appliance Blast Chiller
Quick answer

HIGH PRESSURE means head pressure is too high, above 29 barg (425 psig). The manual lists a clogged condenser, a stopped condenser fan motor or a pump down valve.

Model compatibility: U-Line reuses codes across series and model years, so HIGH PRESSURE may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.

Plain language

What this code means

Head pressure too high, exceeding 29 barg (425 psig).

What HIGH PRESSURE means

Head pressure is too high, exceeding 29 barg (425 psig). On the touch screen version, the HIGH PRESSURE message appears when the pressure switch opens.

What the manual says to check

  • A clogged condenser.
  • A condenser fan motor that is not running.
  • A pump down valve that is not opening while the compressor runs.

Refrigeration-side work belongs to a technician. The pressure switch resets automatically after pressures return to the normal range.

Models and units

The alarm is listed for the UCBF432, UCBF532, UCBF632, UCBF559 and UCBF659 touch screen controller. Remote chillers working in a pump down configuration do not display this alarm message.

Related alarms

U-Line blast chiller service in Los Angeles

If HIGH PRESSURE returns, call (310) 879-5776 about your unit in Los Angeles. Tell us the model, whether the condenser fan was running and what you checked. See also our refrigeration service page.

Source: U-Line Blast Chiller User Guide & Service Manual, Pub. 30379 Rev. P 11/2022 (Alarm/Failure List)

Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.

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Service area Los Angeles & Orange County

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