RUUD UA20 Running No Cold Air
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
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86%
CONF
|
Inverter Control Board
The UA20 relies on a variable-frequency drive to modulate compressor speed for efficiency. A failure in the board's power modules prevents the conversion of electrical energy into the phase-shifted pulses required to rotate the modulating compressor. This results in the outdoor fan running while the compressor remains mechanically inactive, halting the cooling process.
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VIEW ON AMAZON
#CommissionsEarned
|
|
8%
CONF
|
Thermostatic Expansion Valve (TXV)
The TXV is responsible for metering the flow of refrigerant into the evaporator coil to facilitate heat absorption. If the internal diaphragm fails or the sensing bulb loses its charge, the valve may seize in a closed position, preventing refrigerant from expanding and dropping in temperature. This leaves the system circulating air without any thermal energy transfer occurring at the indoor coil.
SKU: 61-102507-02
|
VIEW ON AMAZON
#CommissionsEarned
|
|
6%
CONF
|
Compressor Contactor
The contactor is an electromechanical relay that closes the circuit to provide high-voltage power to the compressor. Over time, electrical arcing can cause pitting or carbon buildup on the contact surfaces, creating high resistance. This resistance can prevent the compressor from drawing the necessary current to overcome head pressure, even while the system's control board and fans are fully powered.
|
VIEW ON AMAZON
#CommissionsEarned
|
DIY Repair Guide
Watch exactly how to replace the Inverter Control Board.
// NOTICE:
This report is generated by an Agentic AI Engineer utilizing probabilistic modeling.
PartSniper is an automated parts recommender service. AI-generated results may not be correct. This data is not a substitute for professional engineering advice or manual inspection. Always verify part compatibility and disconnect power before any repair. PartSniper is not liable for inaccuracies, injury, or damage.