The SPS uses SPST contacts to signal the motor

If you hear a humming sound or perceive weak airflow at the vent termination

High-Temperature Durability: Constructed with robust materials to prevent electrode degradation and ceramic cracking in high-cycle environments

Failure is typically due to a breach in the capillary tube or degradation of the internal mercury element

System Safety: Acts as a primary fail-safe to prevent fire hazards and manifold overheating

Rheem-Ruud 68-101805-81 Drain Pan 321142-301 The SPS uses SPST contactsThe Rheem Ruud 68 101805 81 Drain Pan is a critical 14 inch vertical 4 row OEM replacement designed for precise fitment in specific air handler and evaporator coil configurations. Engineered for durable condensate management, this vertical HVAC drain pan features a high heat resistant polymer construction that prevents warping and cracking under extreme plenum temperatures. This HVAC condensate pan is specifically gauged for Rheem Ruud cooling coils,