Rheem-Ruud 42-22655-02 Relay or a failing blower motor

or a failing blower motor before installing the new 180-degree limit control

a humming 120V coil

When maintaining or repairing Modine unit heaters

For technicians working on 9-inch or 12-inch units

Always verify the glass outside diameter (OD) is 5/8" before installation

Rheem-Ruud 42-22655-02 Relay or a failing blower motorThe Rheem Ruud 42 22655 02 Relay is a professional grade Delay On Break (DOB) timer engineered for high cycle HVAC performance. This specific OEM HVAC replacement part is critical for preventing compressor short cycling, which protects the system from premature mechanical wear and electrical stress during rapid thermostat fluctuations or brownouts. Formulated as a 5 minute time delay relay, it ensures the refrigerant pressures in the compressor have