FieldBench
York codes

York

4 amber

Protect

Y without G

Cool call missing G.

Walk 4 amber in Diagnose

5 plates — walk the one on the cabinet

First check

1 Is the wheel free?

Spin the York TM8T blower by hand. Ice, debris, or a seized bearing is not a control problem. Confirm the motor type on this plate — serial ECM, 9-speed tap, or X-13 — before you grab a capacitor. Stat wiring.

Expect: Wheel free. Correct motor family for this IFC.

The rest of the walkthrough is Diagnose.

On the plates

  • Stat wiring: Y and G both need to make on a cool call, or use a stat that ties them.
  • A cooling-only miswire here is not a pressure-switch problem.
  • Stat wiring. Not a PS code.
  • Stat wiring.

Plates that use 4 amber