Google Nest Community

That pattern usually points more to Nest control logic or configuration (especially dual fuel setup / heat pump balance settings) than wiring itself, so checking equipment type settings and short-cycle protection is key issues like this often get res...

Short cycling after a Nest swap is often a wiring mismatch or missing heat pump configuration—using the * terminal incorrectly can definitely cause that behavior if it was previously tied to emergency heat. You may need to recheck the wiring diagram ...