Goodman
No shift
LockoutRV / mode
Pressures do not swap with a heat/cool changeover.
Walk No shift in Diagnose
Sign in for the next measurement
First check
1 Confirm O/B is energized the way THIS outdoor expects
Most US splits energize O in cool. Some Rheem/Ruud energize B in heat. Read the Goodman GSZ14 diagram, not a generic heat-pump card. O vs B at the stat and at the defrost board jumper. Goodman boards are not automatically Carrier O-on-cool.
Expect: Correct 24 V at the solenoid for the mode that is failing.
The rest of the walkthrough is Diagnose.
On the plates
- O vs B at the stat and at the defrost board jumper. Goodman boards are not automatically Carrier O-on-cool.
- RV solenoid 24 VAC during the commanded shift. Tap test / pressure swap.