The Thermo Revco UxF50086 UltraLow Freezer is a legacy upright ultra-low temperature freezer designed for long-term storage of biological samples, cell lines, DNA and RNA, enzymes, proteins, pharmaceutical materials, research specimens, and other temperature-sensitive laboratory materials.
With 24.1 cubic feet (682 liters) of internal storage capacity, the UxF50086 accommodates approximately 500 standard 2-inch cryoboxes. Its single exterior door and five insulated interior doors provide organized storage while limiting unnecessary heat gain during sample retrieval.
The Revco UxF Series represented a significant advancement in ultra-low freezer technology. Its two-stage cascade refrigeration system, vacuum-insulation technology, touchscreen controls, electronic monitoring, and USB data logging offered features that were considerably more advanced than those of many earlier laboratory freezers.
The UxF50086 was designed to operate from approximately -50°C to -86°C, making it suitable for demanding biotechnology, pharmaceutical, clinical, academic, and research applications.
Although the UxF50086 remains a capable freezer platform, individual units can develop refrigeration, electronic, mechanical, and temperature-performance problems after years of continuous operation.
As a UxF50086 accumulates years of continuous operation, problems may develop involving its cascade refrigeration system, compressors, controls, sensors, alarms, insulation, doors, or electrical components.
Common Thermo Revco UxF50086 service problems include:
Freezer fails to reach or maintain -80°C
High-temperature alarms or repeated temperature excursions
Excessively long temperature recovery following door openings
Compressor failure or declining compressor performance
Refrigerant leaks or other sealed-system problems
One refrigeration stage failing to operate correctly
Touchscreen controller failures or unresponsive controls
Temperature sensor or display inaccuracies
USB logging or data-retrieval problems
Backup battery or alarm-system failures
Worn outer-door gaskets or deteriorating inner-door seals
Excessive frost or ice accumulation
Condenser airflow problems
Excessive compressor run times, noise, or vibration
Electrical faults or intermittent power problems
Increasingly frequent service requirements
A UxF50086 that develops a high-temperature alarm does not automatically require replacement.
The cause may be a worn gasket, failed sensor, electrical component, condenser problem, control fault, or another repairable condition.
However, repeated temperature instability or major cascade refrigeration problems deserve a broader evaluation of the freezer's remaining service life.
Is Your Thermo Revco UxF50086 Worth Repairing?
Potentially, yes.
The UxF50086 was a relatively sophisticated ultra-low freezer platform, and a unit with a healthy refrigeration system may still have useful service life.
An isolated problem involving a gasket, sensor, alarm, electrical component, controller, or other serviceable component may justify repair when the freezer has otherwise performed reliably.
The calculation changes when major refrigeration work is required.
The UxF50086 relies on two refrigeration stages working together to achieve ultra-low temperatures. Compressor deterioration, refrigerant loss, restrictions, heat-exchanger problems, or other sealed-system failures can require extensive diagnosis and repair.
Replacing one major refrigeration component also does not renew the remaining components that have accumulated years of continuous service.
Parts availability should be considered, particularly for proprietary electronic controls and refrigeration components.
If the freezer has experienced repeated compressor failures, temperature excursions, expensive repairs, or deteriorating recovery performance, replacement may provide better long-term value.
American Instrument Exchange can help evaluate the problem and determine whether repair remains a practical investment.
American Instrument Exchange provides service for ultra-low temperature freezers, including Thermo Scientific and Revco equipment.
Depending on the condition and configuration of the freezer, service may include:
Temperature-performance diagnosis
Compressor and cascade refrigeration evaluation
Refrigerant leak detection and applicable repairs
Electrical troubleshooting
Temperature sensor evaluation and replacement
Controller and touchscreen troubleshooting
Alarm-system and backup-battery evaluation
Condenser cleaning and airflow assessment
Door gasket and inner-door inspection
Frost and sealing problem diagnosis
Temperature monitoring and performance verification
Preventative maintenance and repair recommendations
The goal of repairing a UxF50086 is not simply to restore compressor operation. The freezer must be capable of reaching and maintaining the temperature required for its stored materials.
Following significant repairs, temperature performance should be verified using appropriate monitoring equipment before critical samples are returned to the cabinet.
Understanding the UxF Cascade Refrigeration System
The Revco UxF50086 uses a two-stage cascade refrigeration system designed to achieve temperatures far below those possible with a conventional laboratory freezer.
The high-temperature refrigeration stage removes heat from the low-temperature stage through an intermediate heat exchanger. The low-temperature stage then provides the cooling necessary to maintain ultra-low cabinet temperatures.
Both stages must operate correctly for the freezer to achieve its intended performance.
This is an important consideration when troubleshooting a UxF50086 that will no longer reach -80°C.
A freezer may still operate mechanically and produce some cooling even when one refrigeration stage is no longer performing adequately.
The problem cannot always be diagnosed from the temperature display alone.
Proper evaluation may require checking compressor operation, refrigeration pressures, temperatures, electrical components, condenser performance, and other system conditions.
Because cascade refrigeration systems are specialized, major repairs should be performed by technicians experienced with ultra-low temperature equipment.
Touchscreen Controls, Alarms & Data Logging
One of the distinguishing features of the Revco UxF Series was its touchscreen control system.
The controller provided convenient access to temperature settings, operating information, alarms, and user functions. USB data retrieval allowed laboratories to download system information and event logs.
These features remain useful, but proprietary electronic components can become an important consideration as the freezer ages.
A failing touchscreen, intermittent controller, inaccurate sensor, or unreliable alarm system can affect the laboratory's ability to monitor and manage the freezer even when its refrigeration system remains operational.
A freezer used for valuable biological collections must provide dependable temperature control and reliable notification of abnormal operating conditions.
If an older UxF50086 develops persistent control or monitoring problems and replacement components are difficult to obtain, moving to a newer ULT may be more practical than continued repair.
Temperature Recovery & Sample Protection
The ability to reach -80°C is only one measure of ULT freezer performance.
Temperature stability and recovery following door openings are equally important.
The UxF50086 uses five insulated inner doors to limit warm-air exposure during routine sample retrieval.
Nevertheless, every door opening introduces heat into the storage chamber.
A healthy refrigeration system must remove that heat and return the freezer to its operating setpoint.
As compressors and other refrigeration components age, recovery times may increase. The freezer may run longer, experience wider temperature fluctuations, or generate more frequent high-temperature alarms.
These changes can indicate declining refrigeration performance before a complete failure occurs.
Laboratories should monitor recovery behavior and investigate significant changes rather than waiting for the freezer to stop cooling altogether.
Protecting Samples During a UxF50086 Failure
If a Revco UxF50086 begins warming unexpectedly, protecting the stored materials should take priority over equipment troubleshooting.
Keep the exterior door closed as much as possible and avoid unnecessary sample access.
Verify the temperature independently when appropriate and prepare alternate storage if the temperature continues to rise.
The urgency of a temperature excursion depends on the materials stored inside the freezer.
Cell lines, clinical specimens, enzymes, pharmaceutical materials, and research collections may have different temperature tolerances and handling requirements.
Laboratories should follow applicable SOPs, validated storage protocols, and material-specific requirements when responding to a temperature excursion.
An emergency ULT plan should identify backup freezer capacity, responsible personnel, alarm-response procedures, sample-transfer methods, and service contacts before a failure occurs.
For critical sample collections, independent temperature monitoring and a remote alarm system provide additional protection.
When It Makes Sense to Replace a Thermo Revco UxF50086
A UxF50086 that continues to maintain temperature reliably does not necessarily require immediate replacement.
Unlike much older ULT generations, the UxF platform already incorporated advanced insulation, electronic controls, and sophisticated refrigeration technology.
However, replacement becomes more attractive when the freezer develops recurring compressor problems, refrigerant leaks, unreliable electronics, repeated temperature alarms, deteriorating recovery performance, or increasingly frequent service requirements.
The cost of repair should be considered alongside the age and condition of the entire freezer.
A planned replacement may also reduce the risk of an emergency sample transfer following a catastrophic failure.
Modern ULT freezers can provide improved energy efficiency, contemporary refrigeration technology, updated monitoring capabilities, and better long-term support.
For laboratories maintaining valuable or irreplaceable sample collections, dependable operation is often more important than extending the service life of an aging freezer at any cost.
Thermo Scientific TSX50086A: Primary Modern Replacement
For laboratories that want to retain approximately the same storage capacity, the Thermo Scientific TSX50086A is a logical modern replacement for the Revco UxF50086.
The TSX50086A belongs to Thermo Scientific's newer TSX ultra-low freezer family and provides approximately 500 standard 2-inch cryoboxes of storage.
This makes it particularly attractive for laboratories that have organized their sample collections around the UxF50086's 500-box capacity.
The TSX platform incorporates newer refrigeration and control technology designed to provide reliable ultra-low storage with improved operating efficiency.
Modern temperature monitoring, electronic controls, and advanced refrigeration management offer meaningful benefits for laboratories seeking to move beyond an aging UxF system.
For facilities with established Thermo Scientific equipment standards, the TSX50086A also provides continuity within the same manufacturer family.
American Instrument Exchange can help determine whether a refurbished TSX50086A is available and appropriate for the laboratory's requirements.
Thermo Scientific RLE50086: Economical Alternative
The RLE50086 provides a comparable 500-box storage class and is designed for dependable laboratory ultra-low temperature storage.
For laboratories that do not require every advanced feature of the TSX platform, the RLE50086 can provide an attractive combination of capacity, modern refrigeration technology, and value.
A professionally refurbished RLE50086 may also offer a particularly economical way to replace an aging UxF50086 without substantially changing the laboratory's storage organization.
The best choice between the TSX50086A and RLE50086 depends on available inventory, budget, electrical requirements, operating features, and long-term laboratory priorities.
Do You Still Need 500-Box Capacity?
Replacing a UxF50086 provides an opportunity to evaluate actual storage requirements.
The original freezer accommodates approximately 500 standard 2-inch cryoboxes, but the laboratory may no longer require that much capacity.
If the existing cabinet is consistently full, preserving the 500-box class may make sense.
If sample inventory has increased, a larger freezer may provide additional storage and reduce overcrowding.
If much of the freezer remains empty, a smaller ULT may lower equipment cost, floor-space requirements, and potentially energy consumption.
Rack configuration and sample organization should also be considered.
A nominal 500-box capacity does not guarantee that every existing rack or storage accessory will transfer directly to a replacement freezer.
Interior dimensions, compartment layout, rack geometry, and cryobox formats should be verified before purchase.
Key Thermo Revco UxF50086 Specifications
Specification
Details
Manufacturer
Thermo Scientific / Revco
Series
UxF
Model Family
UxF50086
Equipment Type
Upright ultra-low temperature freezer
Capacity
24.1 cu. ft. / approximately 682 L
Standard Cryobox Capacity
500 standard 2-inch boxes
Temperature Range
Approximately -50°C to -86°C
Exterior Door
Single
Interior Doors
Five insulated doors
Refrigeration
Two-stage cascade system
Compressors
Two hermetic compressors
Insulation
Vacuum-insulation panels and foam insulation
Controls
Microprocessor touchscreen
Data Retrieval
USB
Alarm Functions
Adjustable temperature and system alarms
Access Ports
Two 1-inch ports, per original AIE listing
Electrical
Varies by model suffix
Common North American Versions
115/120 V and 208–230 V configurations
Status
Legacy UxF generation
Thermo manufactured multiple UxF50086 electrical and refrigeration configurations. The complete model number, suffix, electrical requirements, refrigerant charge, and other configuration-specific specifications should be verified from the individual freezer's data plate.
Electrical & Installation Considerations
The UxF50086 is a substantial upright freezer, so replacement requires appropriate planning.
Measure the existing freezer, doorways, corridors, elevators, loading areas, and final installation space before selecting a replacement.
Another 500-box freezer may have different exterior dimensions despite offering similar internal storage capacity.
Electrical compatibility is especially important.
The UxF50086 family includes multiple voltage configurations, and the replacement TSX50086A or RLE50086 may have different electrical requirements.
Do not assume that an existing outlet or circuit is suitable for the replacement.
Room ventilation should also be evaluated.
Ultra-low freezers reject heat into their surroundings, and inadequate ventilation can increase compressor run times and negatively affect refrigeration performance.
Adequate clearance around condenser air intakes and exhaust areas should be maintained according to the replacement manufacturer's requirements.
Refurbished Ultra-Low Freezers from American Instrument Exchange
Replacing a legacy UxF50086 does not necessarily require purchasing a new freezer.
American Instrument Exchange supplies professionally refurbished ultra-low temperature freezers from Thermo Scientific, Revco, VWR, Eppendorf, PHCbi, and other manufacturers.
Temperature-controlled equipment is inspected and tested before shipment.
Our technicians use calibrated temperature-monitoring equipment to verify operating performance and evaluate temperature controls, alarms, door gaskets, cabinet condition, and refrigeration operation.
Repairs and refurbishment are performed as needed before equipment is released for sale.
Refurbished equipment includes a 90-day warranty from American Instrument Exchange unless otherwise specified.
For laboratories replacing an aging UxF50086, a newer refurbished ULT can provide a practical balance of reliability, modern technology, and acquisition cost.
Frequently Asked Questions
Is the Thermo Revco UxF50086 discontinued?
The UxF50086 belongs to an older generation of Thermo Revco ultra-low freezers. Laboratories considering long-term support or replacement should evaluate current parts availability and newer Thermo Scientific ULT platforms.
What is the capacity of the Thermo Revco UxF50086?
The UxF50086 provides approximately 24.1 cubic feet, or 682 liters, of internal storage capacity and accommodates approximately 500 standard 2-inch cryoboxes.
What temperature range does the UxF50086 support?
The UxF50086 family was designed for ultra-low operation from approximately -50°C to -86°C, depending on configuration and operating conditions.
Can American Instrument Exchange repair a Thermo Revco UxF50086?
Potentially, yes. American Instrument Exchange provides ultra-low freezer repair services and can evaluate refrigeration, compressor, sensor, controller, alarm, gasket, and electrical problems. Repair feasibility depends on the failure and parts availability.
Why won't my Thermo UxF50086 reach -80°C?
Possible causes include compressor deterioration, refrigeration-system faults, refrigerant leaks, condenser airflow restrictions, worn door gaskets, excessive frost, temperature-sensor problems, or controller faults. Professional diagnosis is needed to identify the cause.
Does the UxF50086 use cascade refrigeration?
Yes. The UxF50086 uses a two-stage cascade refrigeration system with two compressors to achieve ultra-low temperatures.
What refrigerants does the UxF50086 use?
Refrigerant specifications vary by model version. Thermo documentation for certain UxF50086 configurations identifies R404A in the high-temperature stage and an R508B/R290 mixture in the low-temperature stage. Always verify the refrigerant information on the individual freezer before service.
Can the touchscreen on a Revco UxF freezer be repaired?
Some touchscreen and controller problems may be repairable, depending on the failure and availability of compatible components. Proprietary electronics can become more difficult to source as equipment ages.
Why is my UxF50086 recovering slowly after door openings?
Slow recovery can result from warm sample loading, prolonged door openings, deteriorating gaskets, excessive frost, high ambient temperature, or declining refrigeration performance. A significant change from previous recovery behavior warrants evaluation.
Is the TSX50086A a good replacement for a UxF50086?
Yes. The Thermo Scientific TSX50086A provides a modern 500-box ULT storage platform and is a logical upgrade for laboratories seeking comparable capacity with newer refrigeration and control technology.
Is the Thermo RLE50086 also a suitable replacement?
Yes. The RLE50086 offers a comparable storage class and may provide a more economical replacement depending on the laboratory's requirements and available refurbished inventory.
Can I transfer my existing UxF50086 racks into a TSX50086A?
Possibly, but compatibility should not be assumed. Interior dimensions, compartment arrangement, rack configuration, and box sizes should be checked before purchasing the replacement.
What voltage does a Thermo Revco UxF50086 require?
The UxF50086 was offered in different electrical configurations, including 115/120 V and 208–230 V versions. The full model number and data plate should be used to determine the correct requirements.
Should I replace a UxF50086 before it fails completely?
A freezer that remains dependable may still provide useful service. However, repeated alarms, slow recovery, compressor problems, major refrigeration repairs, or unreliable controls can justify planned replacement before an unexpected failure threatens valuable samples.
Does American Instrument Exchange sell refurbished replacements?
Yes. American Instrument Exchange supplies refurbished Thermo Scientific TSX, RLE, and other ultra-low freezer models, depending on inventory.
Repair Your Thermo Revco UxF50086 or Plan an Upgrade
If your Thermo Revco UxF50086 is running warm, experiencing temperature alarms, recovering slowly, developing compressor problems, or becoming increasingly unreliable, American Instrument Exchange can help evaluate whether repair remains practical.
An isolated repair may extend the freezer's useful life when its refrigeration system and overall condition remain sound.
When major refrigeration work, obsolete electronics, repeated failures, or declining temperature performance make continued repair less attractive, American Instrument Exchange can help identify a newer replacement.
Contact American Instrument Exchange to discuss Thermo Revco UxF50086 repair, UxF freezer compressor problems, -80°C freezer service, touchscreen failures, Thermo UxF replacement, TSX50086A upgrades, RLE50086 replacements, or refurbished ultra-low freezers.
Click Hereto see the Thermo Revco UxF ultralow freezer on the American Instrument Exchange YouTube channel.
FAQ
Does the equipment come with a warranty?
Yes, all equipment from American Instrument Exchange comes with a warranty. Used/reconditioned/refurbished equipment is tested to make sure it operates to the manufacturer's specifications and comes with a 90-day warranty (unless otherwise noted). New equipment comes with a warranty from the manufacturer.
How do you test and recondition the equipment?
Testing requirements vary across all the equipment categories we sell. Temperature controlled units are tested with NIST traceable probes and data loggers. Gaskets, external housing, glass, handles, controls and control screens are all thoroughly inspected for integrity and functionality. We test all equipment using the manufacturer's parameters and specifications to confirm that the unit operates properly.
How do products ship from American Instrument Exchange?
We can ship products both nationally and internationally using a well-established network of transporters. Smaller items will ship via UPS. Larger equipment will be palletized and shipped either LTL or air-ride, depending on the specific equipment and/or delivery requirements.
Return and order cancellation policy
American Instrument Exchange will accept the return of any product that is not working as represented and could not be replaced or repaired to the customer's satisfaction during the warranty period. Customers who cancel orders after refurbishing has begun will be subject to a cancellation and restocking fee of between 20% and 40%.
Are discounts available for educational or non-profit institutions, or for bulk purchases?
Yes – call or email us today with a list of equipment you're looking for and we can potentially put together a quote that includes a discount.
How does your price matching policy work?
We strive to keep our pricing competitive and reasonable. If you find comparable items for sale at a lower price from other vendors please send us a link and or quote for the item and we'll do our best to match or beat the price.
Can I see the equipment in person before committing to a purchase?
Customers are welcome to make an appointment to view equipment in our warehouse. Given our workload we may not be able to test or clean the equipment prior to your arrival if you have not committed to an order.
1023 Western Avenue is a working warehouse, not a showroom, and customers should dress appropriately and wear closed toe shoes.
Can I ship products that I purchased elsewhere to American Instrument for repair?
Yes – please see our repair services page for more information.
