Reversing Valve Wiring Check O B and Common Wire CompatibilityNo, not all heat pump thermostat wiring diagrams are identical and mismatches can cause system failure. Learn how to check thermostat wiring, O and B reversing valve assignment, common wire presence, auxiliary heat configuration, and wiring diagrams with tips for swapping terminals and labeling conductors to avoid reversed modes, power loss, and short cycling. This guide covers thermostat compatibility, heat pump wiring troubleshootin