What causes the LO code on a Frigidaire dishwasher?

Rinse aid reservoir empty: Normal use depletes the reservoir every 1-3 months. Rinse aid dispenser cap not seated: If cap is loose, sensor can read empty. Faulty rinse aid level sensor: Less common — magnetic float sensor failed.

Frigidaire · Dishwasher Minor

LO — Low rinse aid

Indicator that the rinse aid dispenser is empty or nearly empty. Not a fault — just a refill reminder.

Keep using it?: Yes — fix when convenient
DIY difficulty: Easy
Verified against: frigidaire.com ↗

How to fix it

Open the door and unscrew the rinse aid cap (usually next to the detergent cup).
Refill with rinse aid until the indicator window darkens.
Seat the cap fully and wipe spills.
If LO returns immediately with a full reservoir, replace the dispenser assembly.

Why it happens

Typical signs: LO indicator lit on control panel · Spotty or wet dishes at end of cycle · Dishwasher otherwise runs normally

Rinse aid reservoir empty Normal use depletes the reservoir every 1-3 months.
Rinse aid dispenser cap not seated If cap is loose, sensor can read empty.
Faulty rinse aid level sensor Less common — magnetic float sensor failed.

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

Frigidaire dishwasher detergent / rinse aid dispenser Common replacement
Amazon →

More Frigidaire dishwasher codes

Cd Cd — Door Not Closed / Latched CL CL — Close the door ER ER — General electronic control fault Hot Hot — Water inlet too hot HS HS — Wash Motor Hall Sensor Error i10 i10 — Water Not Detected (Fill)

All Frigidaire codes → All dishwasher codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: frigidaire.com.