What are the signs that this switching relay has failed

Ensure reliable sequence of operation with the Trane SWT2523 Pressure Switch

which can be pushed

Can I use a generic 5-blade propeller instead of this OEM part

Supports proper heating and cooling cycle operation

Ranco V2-4100F0-370 Reversing Valve 30067439-890 What are the signs thatThe Ranco V2 4100F0 370 is a heavy duty 4 way reversing valve engineered for precision refrigerant flow control in residential and light commercial heat pump applications. Rated for a 2 ton nominal capacity, this slide type valve is fully compatible with both R22 and R410A systems, making it a versatile drop in for reversing valve replacement projects involving split systems, unitary units, or window type heat pumps. Constructed with a hermetically