A Guide to Spa Error Codes

Getting a spa error code is much like having your check engine light come on in your car. It stinks. But, it is important to find out what the code is trying to tell you so that you can keep your spa in the best operating condition. Codes don’t come up too often and hopefully for you they don’t come up at all, but just in case they do, here is a handy reference for the different codes, what they mean, and what to do about them.

OH

What it means

This one stands for “Overheat”. When you get this code, the tub shuts down because one of the temperature sensors has detected a rise in water temperatures that goes over acceptable safety limits. DO NOT GET IN THE WATER. 

How to Fix

Remove the spa cover to allow the spa to cool of . Shut off the power to the tub and contact the dealer if the issue continues.

COOL

What it Means

Potential freeze conditions have been detected. The spa will activate the heater and jets pump #1 for protection. This code will show when the water is more than 19°F colder than the temperature has been set. The tub will continue operating in this mode until the water temps rise to within range of the set temperature.

How to Fix

No corrective action will need to be taken.

FLO

What it Means

This code stands for Flow Switch. This code appears when the flow switch is malfunctioning or the flow of water is being inhibited. The heater is deactivated and the filter and circulation systems may be deactivated as well.

How to Fix

Check the filter to make sure it isn’t clogged and ensure proper water levels in the spa. Contact your dealer or a local technician if the problem persists.

BLB

What it Means? 

This error flashes in between “bLb” and displaying the water temp. It indicates that it is time to change out the UV bulb in the spa.

How to Fix

Acquire a new UV bulb from your local dealer, install it in the spa, and reset the countdown timer.

HOT

What it Means

The circuit board temperature threshold has been exceeded.

How to Fix

The error code will go away once the circuit board cools down within limits. If the message continues, provide shade to the side of the spa that houses the equipment.

ICE

What it Means

A freeze condition has been detected by the system. The jet pumps operates until the water is warmed and the spa is out of the danger zone.

How to Fix

No action is necessary. It is common to see this message when you are filling up the spa for the first time as tap water can be very chilly.

PF

What it Means

This error indicates a spa power failure. The power is fluctuating in the secondary power line resulting in low DC voltage.

How to Fix

Reset power to the spa. The PF error will reset itself if power levels return to normal. Contact the dealer or local service tech if problem persists

PNL

What it Means

Indicates faulty communication between the spa’s control panel and the circuit board or control panel

How to Fix

Contact the dealer or local service tech.

Sn1

What it Means

It stands for “Sensor 1” and displays when the high-limit sensor is malfunctioning.

How to Fix

Contact the dealer or local service tech.

Sn3

What it Means

Stands for “Sensor 3” and displays when the main water temperature sensor is shorted or disabled. The heater is disabled in this case.

How to Fix

Contact the dealer or local service tech

FLO2 or ICE2

What it Means

This error indicates that the flow switch is malfunctioning. The system is disabled in this case and system startup has shorted or has a closed flow switch in this situation.

How to Fix

Contact the dealer or local service tech