Beverage-Air 502-139A Replacement Temperature Control

Beverage-Air 502-139A Temperature Control

Commercial replacement part. Beverage-Air 502-139A regulates the cooling cycle by responding to the temperature at its sensing element. Matching the original control and sensing arrangement helps restore dependable cabinet operation.

When to inspect or replace this part

Check this control when the cabinet runs continuously, cycles unexpectedly, or cannot maintain its usual temperature. Airflow restrictions, a damaged probe, wiring problems and refrigeration faults can produce similar symptoms, so diagnose the complete system before replacing the control.

Specifications

Compatibility and ordering checks

Catalog application references: BB48, BB48B, BM23, BM23B, CR24, CR48, CR74, ER24, ER241, ER48, ER481, ER74, ER741, KR12, KR74, MT23, MT38, MT45, PR24, PR241, PR48, PR481, PR74, PR741A, PRD24, PRF12, RI18, RR27, RR49, SLM48, UCR34. Verify the serial-specific parts list before ordering.

Match the original part number, equipment model and serial number, capillary length, sensing location, mounting points and electrical connections. A control that looks similar may have a different operating range or switching function.

Installation and service

Disconnect electrical power before service. A qualified technician should preserve the original sensing position, route the capillary without sharp bends, reconnect according to the equipment wiring diagram and check cycling after installation.

Frequently asked questions

What is the 502-139A used for?

Beverage-Air 502-139A regulates the cooling cycle by responding to the temperature at its sensing element. Matching the original control and sensing arrangement helps restore dependable cabinet operation.

Which models use 502-139A?

Catalog application references: BB48, BB48B, BM23, BM23B, CR24, CR48, CR74, ER24, ER241, ER48, ER481, ER74, ER741, KR12, KR74, MT23, MT38, MT45, PR24, PR241, PR48, PR481, PR74, PR741A, PRD24, PRF12, RI18, RR27, RR49, SLM48, UCR34. Verify the serial-specific parts list before ordering.

Does a matching capillary length prove compatibility?

No. The switching function, temperature range, sensing placement and mounting must also match the equipment's parts information.

Can a new control fix every warm-cabinet complaint?

No. Inspect the condenser, evaporator airflow, door seals and refrigeration system as part of diagnosis.

Can the capillary tube be shortened?

Do not cut or sharply bend a sealed capillary. Route the replacement as directed in the equipment service instructions.

How should the control be checked after installation?

Monitor cabinet temperature with a separate calibrated thermometer and confirm normal cycling under the manufacturer's service procedure.

Need help confirming the replacement? Have the model, serial number and original part number ready and call 631-873-0509.

Browse Beverage-Air replacement parts and commercial refrigeration parts.