Trane HTR15188 Crankcase Heater This ensures the unit does

This ensures the unit does not attempt to recycle under unsafe conditions

If your water heater status light flashes seven times with a three-second pause

and rooftop units

this snap disc limit switch provides accurate thermal sensing directly in the airflow path

5 pole' vs '1 pole' mean for this part

Trane HTR15188 Crankcase Heater This ensures the unit doesThe Trane HTR15188 Crankcase Heater is a heavy duty, belt type compressor heater engineered for industrial and commercial HVAC systems operating on 480V 150W power configurations. Designed to maintain refrigerant temperatures above the ambient dew point, this heater prevents liquid migration to the compressor oil during the off cycle, significantly reducing the risk of slugging at startup. This specific Trane OEM replacement part features a 12" to 13"