Beverage-Air 402-258B-01 OEM Digital Thermometer with Probe

Beverage-Air 402-258B-01 OEM Digital Thermometer with Probe

The Beverage-Air 402-258B-01 Digital Thermometer is a genuine OEM temperature-monitoring component designed for compatible Beverage-Air commercial refrigeration equipment. The digital display provides operators and service personnel with a visible cabinet-temperature reference for routine equipment monitoring and refrigeration service.

Reliable temperature indication is important in commercial refrigeration because restaurant operators, technicians, and facility personnel need a clear way to monitor refrigerated storage conditions. A thermometer with a damaged display, failed probe, intermittent wiring, or inaccurate temperature response can make equipment performance difficult to evaluate and may hide an underlying refrigeration problem.

When replacement of the original display thermometer is required, using the correct Beverage-Air OEM 402-258B-01 helps restore the manufacturer-identified temperature-monitoring configuration intended for compatible Beverage-Air equipment.

OEM Part Details & Specifications

• Manufacturer: Beverage-Air
• OEM Part Number: 402-258B-01
• MPN: 402-258B-01
• Previous OEM Part Number: 402-218B
• Part Type: Digital Thermometer
• Display Type: Digital
• Probe Size: approximately 1-3/4" x 1/4"
• Approx. Length: 4.85"
• Approx. Width: 1.5"
• Approx. Height: 1.4"
• Approx. Weight: 0.09 lb.
• Application: Commercial Refrigeration Equipment
• Function: Cabinet Temperature Monitoring

Previous Part Number 402-218B

Beverage-Air 402-258B-01 supersedes older thermometer reference 402-218B. Technicians may encounter 402-218B in older parts books, service records, or on the component being removed.

Use 402-258B-01 as the current primary OEM ordering reference while retaining 402-218B as a useful cross-reference for legacy equipment identification.

What the Beverage-Air 402-258B-01 Thermometer Does

The 402-258B-01 digital thermometer monitors temperature at its sensing probe and displays the measured value for the equipment operator. Unlike a temperature controller or thermostat, the thermometer's primary purpose is to provide visible temperature information rather than directly regulate the refrigeration system.

Proper thermometer operation helps support:

• Visible cabinet-temperature monitoring
• Routine refrigeration performance checks
• Food-storage temperature observation
• Technician troubleshooting
• Detection of unusual temperature changes
• Consistent commercial refrigeration monitoring

Thermometer vs. Temperature Controller

The thermometer and refrigeration temperature controller perform different functions.

• Digital Thermometer: Measures and displays cabinet temperature.
• Temperature Controller / Thermostat: Commands the refrigeration circuit according to the equipment's temperature-control logic.

If a cabinet is running too warm or too cold, do not automatically replace the thermometer. The underlying refrigeration control system should be diagnosed separately.

Verified Beverage-Air Applications

Published service-parts documentation associates Beverage-Air 402-258B-01 with applications including:

• EF24-1AH
• EF24-1AHS
• EF24-1AHS-34
• EF241AH 0001RCN
• ER24-1AHS-34

Fitment Note: This should not be treated as a complete model list. Beverage-Air equipment can vary by model revision and serial number. Verify OEM part number 402-258B-01, complete equipment model, serial number, original display, probe configuration, and mounting arrangement before ordering.

Digital Display & Probe

The 402-258B-01 uses a digital display connected to a temperature-sensing probe. Published service data identifies the probe at approximately 1-3/4" long x 1/4" diameter.

When comparing the replacement with the original thermometer, inspect:

• Display dimensions
• Probe dimensions
• Probe position
• Probe lead routing
• Mounting arrangement
• Connector style
• Original component markings

Common Signs of a Digital Thermometer Problem

• Display remains blank
• Temperature reading is obviously incorrect
• Reading changes erratically
• Display is difficult to read
• Temperature indication freezes at one value
• Probe is physically damaged
• Probe wire is cut or pinched
• Connections are loose or corroded
• Display housing is cracked
• Temperature reading differs significantly from a verified reference thermometer

These symptoms do not automatically confirm thermometer failure. Probe placement, wiring, actual refrigeration problems, airflow conditions, door leakage, and equipment operating conditions can also affect observed cabinet temperature.

Diagnosing an Incorrect Temperature Reading

If the displayed temperature does not appear reasonable, compare it with a known accurate reference thermometer before replacing components.

Qualified service personnel should inspect:

• Actual cabinet temperature
• Probe location
• Probe contact and mounting
• Probe wiring
• Display connections
• Refrigeration airflow
• Door gasket condition
• Evaporator operation

Probe Position Matters

The sensing probe should remain positioned according to the original Beverage-Air equipment arrangement. Moving the probe to a different location can cause the displayed reading to differ from the temperature the equipment was designed to monitor.

Before removing the original probe, document its mounting position and wire routing so the replacement can be installed consistently.

Inspect Probe Wiring & Connections

A damaged probe lead or connection can create intermittent or incorrect readings even when the digital display itself remains functional.

Inspect for:

• Broken conductors
• Pinched probe wire
• Loose connectors
• Corrosion
• Moisture contamination
• Damaged insulation
• Previous wiring repairs

Temperature Reading vs. Refrigeration Problem

A high displayed temperature does not automatically mean the thermometer is defective. The thermometer may simply be reporting an actual refrigeration condition.

If cabinet temperature is elevated, technicians should inspect applicable:

• Compressor operation
• Evaporator airflow
• Condenser cleanliness
• Refrigerant-system performance
• Temperature controller
• Door gasket condition
• Door alignment
• Product loading

Technician Checks Before Ordering

Before ordering Beverage-Air 402-258B-01, verify:

• OEM part number 402-258B-01
• Previous reference 402-218B where applicable
• Complete Beverage-Air equipment model
• Equipment serial number
• Original thermometer markings
• Display dimensions
• Probe size and configuration
• Probe lead routing
• Mounting arrangement
• Connector configuration

Do not select a digital refrigeration thermometer by appearance alone. Similar displays may use different probes, connectors, mounting dimensions, temperature scales, and equipment applications.

Commercial Refrigeration Applications

Beverage-Air digital thermometers are used in commercial refrigeration environments including:

• Reach-in refrigerators
• Reach-in freezers
• Commercial freezer cabinets
• Restaurant refrigeration
• Commercial kitchens
• Hotels
• Schools
• Hospitals
• Institutional kitchens
• Foodservice facilities

Installation & Service Notes

Before removing the original thermometer, document:

• Display orientation
• Mounting location
• Probe location
• Probe-wire routing
• Connector position
• Original component markings

Compare the replacement Beverage-Air 402-258B-01 with the original thermometer before installation.

After installation, verify:

• Display operates normally
• Temperature reading is reasonable
• Probe remains securely positioned
• Probe wire is protected from damage
• Connections remain secure
• Displayed temperature tracks actual cabinet conditions

Why Correct Beverage-Air OEM Identification Matters

Commercial refrigeration thermometers can look similar while using different displays, probes, mounting arrangements, connectors, and equipment applications.

Using Beverage-Air OEM part number 402-258B-01, together with previous reference 402-218B, provides the strongest identification method for this genuine OEM digital thermometer.

Frequently Asked Questions

What is Beverage-Air 402-258B-01?

Beverage-Air 402-258B-01 is a genuine OEM digital thermometer used in compatible Beverage-Air commercial refrigeration equipment.

Is 402-258B-01 a temperature controller?

No. It is primarily a digital temperature-monitoring display. The refrigeration thermostat or electronic controller performs the actual temperature-control function.

Does 402-258B-01 include a probe?

Published service data identifies the thermometer with a temperature probe approximately 1-3/4" long by 1/4" diameter.

What was the previous part number?

Parts Town lists 402-218B as the previous Beverage-Air part replaced by 402-258B-01.

What are the approximate display dimensions?

Parts Town publishes dimensions of approximately 4.85" long x 1.5" wide x 1.4" high.

Which Beverage-Air models use 402-258B-01?

Published references include EF24-1AH, EF24-1AHS, EF24-1AHS-34, EF241AH 0001RCN, and ER24-1AHS-34. Verify the complete model and serial number before ordering.

Can a damaged probe cause an incorrect reading?

Yes. Probe damage, incorrect positioning, wiring faults, or connection problems can produce inaccurate or intermittent readings.

Can a high temperature reading mean the thermometer is bad?

Not necessarily. The thermometer may be accurately reporting a refrigeration problem. Compare with a verified reference thermometer and inspect the refrigeration system.

Can I replace 402-258B-01 with another digital thermometer that looks similar?

No. Verify OEM number, probe configuration, display dimensions, connector arrangement, model, serial number, and mounting before ordering.

How do I confirm Beverage-Air 402-258B-01 is correct?

Verify OEM part number 402-258B-01, complete Beverage-Air model and serial number, original thermometer, probe, display dimensions, mounting arrangement, and connections before ordering.

Is professional installation recommended?

Qualified commercial refrigeration personnel can verify probe placement, display operation, wiring, and actual cabinet temperature during replacement.

Why Buy From Parts Direct Online?

Parts Direct Online supplies genuine OEM Beverage-Air digital thermometers, temperature controls, probes, fan motors, heaters, relays, gaskets, and related commercial refrigeration replacement parts for service technicians, contractors, restaurants, supermarkets, hotels, institutional kitchens, and foodservice operations throughout the United States.