Maintain peak cooling capacity from your Ruud UAKB-048JAZ/Serial: 6954 central air conditioner with genuine OEM replacement parts from Repair Clinic. The UAKB-048JAZ is a 4-ton single-stage cooling-only condensing unit in Ruud’s UAKB series. Because Ruud and Rheem are sister brands sharing the same manufacturing platform under Rheem Manufacturing, the UAKB-048JAZ and its Rheem equivalent at the same 4-ton configuration use identical components; parts ordered under either brand designation are interchangeable. The serial prefix 6954 in the UAKB-048JAZ/Serial: 6954 designation identifies the production date range and does not affect parts compatibility for capacitors, contactors, fan motors, or fan blades. Parts most frequently replaced include the run capacitor, contactor, condenser fan motor, and fan blade. Use the UAKB-048JAZ/Serial: 6954 parts list and browse the full Ruud central air conditioner parts catalog.
UAKB-048JAZ at 4 Tons: Output Class, Serial Date Context, and Ruud-Rheem Platform Interchangeability
The Ruud UAKB-048JAZ is a 4-ton (48,000 BTU) condensing unit. The 048 in the model number identifies the 4-ton output class, which is the largest common residential condensing unit size in the UAKB series; components from the UAKB-030JAZ (2.5-ton), UAKB-024JAZ (2-ton), or UAKB-036JAZ (3-ton) configurations are not interchangeable with the UAKB-048JAZ fan motor and blade because these are output-class specific. The UAKA-048JAZ is the prior-series equivalent at the same 4-ton output class; many service components are shared between the UAKA and UAKB series at the same tonnage. The serial prefix 6954 identifies the production week and year; for capacitors, contactors, fan motors, and fan blades, this serial date does not affect parts selection within the UAKB-048JAZ model. The UAKB-048JAZ/Serial: 6954 manual documents refrigerant charge specification and component locations. For diagnostic guidance, visit the Ruud air conditioner troubleshooting section.
UAKB-048JAZ High-Tonnage Component Wear and Service Priorities
UAKB-048JAZ/Serial: 6954 Capacitor and 4-Ton Compressor Startup Stress
The UAKB-048JAZ/Serial: 6954 capacitor is a dual-run unit serving the 4-ton compressor and condenser fan motor. A 4-ton compressor draws higher locked-rotor amperage during startup than 2.5-ton or 3-ton units; a degraded capacitor produces a proportionally larger current overload stress on each startup cycle at 4-ton output, accelerating compressor winding insulation degradation faster than at smaller output classes. Annual microfarad testing before cooling season is essential; replace the capacitor immediately when either section reads more than five percent below the rated value. Browse Ruud central air conditioner capacitor parts.
Ruud UAKB-048JAZ Contactor Switching at 4-Ton Load
The contactor on the Ruud UAKB-048JAZ switches line voltage to the 4-ton compressor and condenser fan motor at every thermostat cooling cycle. At 4-ton output the contactor handles the highest switching loads in the UAKB series, accelerating contact face erosion faster than at lower tonnage configurations. Inspect the contact faces at each annual cooling season service; replace the UAKB-048JAZ contactor when any pitting or erosion is visible, or proactively every four to five years in warm climates. Find compatible options at the Ruud air conditioner contactor page.
UAKB-048JAZ model 6954 Fan Motor Bearing Wear at 4-Ton Coil Airflow
The UAKB-048JAZ model 6954 fan motor drives the condenser fan that moves ambient air through the 4-ton coil to reject refrigerant heat. At 4-ton output, the fan motor moves more air than at smaller configurations; bearing wear reduces operating RPM proportionally, cutting coil airflow and raising condensing pressure. Replace the motor at the first sign of bearing noise. Always confirm the 048 output class designation when ordering a replacement; UAKB motors from smaller tonnage configurations are not interchangeable. Browse Ruud central air conditioner fan motor parts.
UAKB-048JAZ model 6954 Fan Blade 4-Ton Specification and Inspection
The UAKB-048JAZ model 6954 Fan blade is pitched for the 4-ton condenser coil airflow requirement at the motor’s rated RPM. A blade with physical damage creates imbalance that vibrates the motor bearing during every cooling cycle. Inspect the blade annually for tip damage, surface corrosion, and hub cracking; replace the blade immediately if any damage is found and confirm the diameter, pitch, and hub bore from the UAKB-048JAZ/Serial: 6954 parts list before ordering. Browse Ruud air conditioner fan blade parts.
Ruud UAKB-048JAZ Parts at Repair Clinic
- Genuine Ruud OEM Parts at 4-Ton Output Class Verification: Our UAKB-048JAZ listings distinguish 048-class (4-ton) fan motor and blade components from lower tonnage UAKB configurations. Browse the full Ruud central air conditioner parts catalog.
- Ruud-Rheem Cross-Reference Confirmed: Our listings confirm interchangeability between UAKB-048JAZ parts and their Rheem equivalents at the same 4-ton configuration.
- UAKA and UAKB Series Cross-Reference: Our listings identify which UAKB-048JAZ components are shared with the prior-generation UAKA-048JAZ at the same 4-ton output class.
- Fast Shipping: In-stock UAKB-048JAZ parts ship promptly, supported by the Ruud air conditioner troubleshooting section.
Ruud UAKB-048JAZ Central Air Conditioner Parts FAQ
What tonnage is the Ruud UAKB-048JAZ?
The Ruud UAKB-048JAZ is a 4-ton (48,000 BTU) condensing unit. The 048 in the model number identifies the 4-ton output class. Fan motors and blades ordered for this unit must be specified for the 4-ton 048 output class and are not interchangeable with components from the UAKB-024JAZ (2-ton), UAKB-030JAZ (2.5-ton), or UAKB-036JAZ (3-ton) configurations.
Are Ruud UAKB-048JAZ and Rheem parts interchangeable?
Yes. Ruud and Rheem are sister brands sharing the same manufacturing platform. The UAKB-048JAZ and its Rheem equivalent at the same 4-ton configuration are identical units. Parts ordered under either brand designation are interchangeable with no modification required.
What does the Serial: 6954 prefix mean for UAKB-048JAZ parts ordering?
The 6954 serial prefix identifies the production week and year of manufacture. For the run capacitor, contactor, fan motor, and fan blade, this serial date has no impact on parts compatibility within the UAKB-048JAZ model. For control boards and wiring harnesses, confirm the serial range is covered in the specific listing before ordering.
Are UAKA-048JAZ and UAKB-048JAZ parts interchangeable?
Many components including the run capacitor, contactor, and fan motor are interchangeable between the UAKA-048JAZ and UAKB-048JAZ at the same 4-ton output class. The UAKA is a prior-series designation within the same Ruud-Rheem manufacturing platform. Control boards may carry series-specific part numbers; confirm against the UAKB-048JAZ/Serial: 6954 specific listing for control board components.
