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The RHEEM rxmd-c04 is an OEM time delay relay configured for on-delay-on-break operation, designed for use in Rheem HVAC systems. Time delay relays control the timing of electrical circuit engagement and disengagement, allowing system components to start or shut down in a controlled sequence. The on-delay-on-break function means the relay introduces a timed delay both when energizing and when breaking the circuit, protecting compressors, blower motors, and other load-sensitive components from abrupt cycling. This part is installed by licensed HVAC technicians during service or equipment repair.
The rxmd-c04 is intended for residential and light commercial Rheem HVAC applications where controlled sequencing of electrical loads is required. Time delay relays of this type are commonly found in split systems, packaged units, and air handlers where compressor short-cycle protection or blower delay functions are part of the system design. This relay serves as a direct OEM replacement, maintaining original equipment timing parameters and circuit behavior.
Designed as an OEM replacement time delay relay for Rheem HVAC equipment.
Installation should be performed by a licensed HVAC technician. Disconnect and lock out all power to the unit before removing or installing the relay. Verify control voltage and circuit wiring against the equipment wiring diagram before energizing the system. Follow all applicable local electrical codes and NEC requirements during installation.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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