FieldBench
Goodman codes

Goodman

EE5

Protect

Open fuse

24 V fuse on the IFC is open.

Walk EE5 in Diagnose

Sign in for the next measurement

First check

1 Find the 24 V short before you replace the fuse

On Goodman GR9S96 an open IFC fuse is a short on W, Y, G, HUM, EAC, or a data pair landed on 24 V. Unplug the thermostat / data harness first. Short on W, Y, G, humidifier, EAC.

Expect: Fuse out. 24 V transformer still good. Harness isolated.

The rest of the walkthrough is Diagnose.

On the plates

  • Short on W, Y, G, humidifier, EAC.
  • Unplug the tstat harness and replace the fuse.

Plates that use EE5