Could a failing Dual Run Capacitor cause the RHEEM RA16 to have symptom: Starts Then Shuts Off?

The capacitor provides the necessary phase-shifted current to the compressor's start windings; as the dielectric degrades, the compressor draws excessive amperage during the run cycle. This causes the internal thermal overload protector to heat up and open the circuit, shutting the unit down to prevent motor winding melting. Once the protector cools, it resets, leading to the repeated start-stop behavior.

Could a failing Condensate Safety Float Switch cause the RHEEM RA16 to have symptom: Starts Then Shuts Off?

This switch is wired in series with the 'Y' cooling wire; if the primary drain line is obstructed by sediment or algae, the water level rises in the secondary pan during operation. The rising float breaks the 24V signal to the outdoor contactor, instantly shutting off the condenser. As the water slowly seeps out, the switch closes again, allowing the cycle to restart prematurely.

Could a failing Merv 11 Pleated Air Filter cause the RHEEM RA16 to have symptom: Starts Then Shuts Off?

Extreme restriction in airflow across the evaporator coil leads to a drop in pressure and temperature of the refrigerant. If the pressure drops below the threshold of the Low Pressure Control switch, the system will cut power to the compressor to prevent the evaporator from freezing into a solid block of ice, which would otherwise lead to mechanical compressor failure.

What is the most likely root cause for a RHEEM RA16 with symptom: Starts Then Shuts Off?

The capacitor provides the necessary phase-shifted current to the compressor's start windings; as the dielectric degrades, the compressor draws excessive amperage during the run cycle. This causes the internal thermal overload protector to heat up and open the circuit, shutting the unit down to prevent motor winding melting. Once the protector cools, it resets, leading to the repeated start-stop behavior.

RHEEM RA16 Starts Then Shuts Off

CONF	DIAGNOSIS	ACTION
91% CONF	Dual Run Capacitor The capacitor provides the necessary phase-shifted current to the compressor's start windings; as the dielectric degrades, the compressor draws excessive amperage during the run cycle. This causes the internal thermal overload protector to heat up and open the circuit, shutting the unit down to prevent motor winding melting. Once the protector cools, it resets, leading to the repeated start-stop behavior.	VIEW ON AMAZON #CommissionsEarned
5% CONF	Condensate Safety Float Switch This switch is wired in series with the 'Y' cooling wire; if the primary drain line is obstructed by sediment or algae, the water level rises in the secondary pan during operation. The rising float breaks the 24V signal to the outdoor contactor, instantly shutting off the condenser. As the water slowly seeps out, the switch closes again, allowing the cycle to restart prematurely.	VIEW ON AMAZON #CommissionsEarned
4% CONF	Merv 11 Pleated Air Filter Extreme restriction in airflow across the evaporator coil leads to a drop in pressure and temperature of the refrigerant. If the pressure drops below the threshold of the Low Pressure Control switch, the system will cut power to the compressor to prevent the evaporator from freezing into a solid block of ice, which would otherwise lead to mechanical compressor failure.	VIEW ON AMAZON #CommissionsEarned

DIY Repair Guide

Watch exactly how to replace the Dual Run Capacitor.

// 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.

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RHEEM RA16 Starts Then Shuts Off

DIY Repair Guide