ERV & HRV Fresh Air Systems User and Installer ManualCarrier E23 fault code

Supply motor (drive over current)

What the manual says

Supply motor (drive over current)

Checks from the manual

STEP 1: Unplug/then plug in the unit.
If STEP 1 did not fix the problem, perform STEP 2: Remove core and clear the ventilation wheel from any dirt or obstacles.
If STEP 2 did not fix the problem, perform STEP 3: Disconnect J2 (white) and connect a spare blower system. If it works, replace supply blower.
If STEP 3 did not fix the problem, perform STEP 4: Replace the electronic assembly.

Source

ERV & HRV Fresh Air Systems User and Installer Manual, p. 18

E23 | Supply motor (drive
over current) | STEP 1: Unplug/then plug in the unit.
If STEP 1 did not fix the problem, perform STEP 2: Remove core and clear the ventilation wheel from any dirt
or obstacles.
If STEP 2 did not fix the problem, perform STEP 3: Disconnect J2 (white) and connect a spare blower system.
If it works, replace supply blower. If STEP 3 did not fix the problem, perform STEP 4: Replace the electronic
assembly.

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Last checked 2026-10-18 against ERV & HRV Fresh Air Systems User and Installer Manual.

Safety: disconnect power before opening the unit. Gas, high voltage and refrigerant work belongs to a licensed technician.