Daikin

E9

Lockout

High-stage PS open

Inducer on high, high-fire switch never closes. Runs on low, will not go high.

3 plates — walk the one on the cabinet

First check

1 Prove inducer and the live code

Do not pull power — that clears the Daikin DM80VC active code. Write E9. Is the inducer spinning on this call? Silent inducer is not a pressure switch. This is Category I metal vent. There is no 96% collector or PVC trap to prime.

Expect: 120 VAC at the inducer on a heat call. Wheel turning.

If fail: 120 VAC missing → IFC / door switch / incoming power. Voltage + dead motor → inducer.

If pass: Inducer running + this code → trap, hose, switch, vent (step 2).

The rest of the walkthrough is Diagnose.

On the plates

Inducer actually changes speed?
HPS hose on the high tap only.
Vent capacity / condensate only under high fire.
This is Category I metal vent. There is no 96% collector or PVC trap to prime.
Cap, liner, common-vent tables, inducer wheel, hose on the inducer housing.

Plates that use E9

Same number, other makers

E9 on Daikin is not the same code on these plates.