You stroll out to use your spa or hot tub and instantly you know some thing is incorrect. Either the water is cold, which tends to make for a much less than enjoyable soak or nothing at all is functioning at all. The spa seems dead.

If you have a digital technique in your spa or hot tub with a digital upper manage, you very first appear at the upper manage show to see if it will inform you what is going on. Searching at your upper manage, you see abbreviations like SN1 or FLO or even “—-“. What do these symbols and abbreviations imply?

The symbols and abbreviations displayed on your spas upper manage are referred to as error codes. They inform you that the spa has detected a predicament for which it then tries to determine. Diverse gear makers use various codes to determine particular circumstances located by the spa self diagnostic technique.

We will appear at the two spa systems I obtain most inquiries about. Balboa controls and Sundance Spas controls.

Balboa, a single of the most frequent spa controls makers, utilizes the following codes.

pd = Energy provide, unit operating on battery backup

OH = Sensors reading 112-118 Degrees

Flo = Improper flow or stress switch malfunction

Cool = Water temp 20 degrees under set point

ICE = Possible freeze situation has been detected

Sn1 = Hi-limit sensor malfunction

Sn3 = Temp sensor malfunction

LOC = Interlock failure – attainable pump or ozone spike

(—-) = Unknown water temperature. (Displays when Spa is very first powered up immediately after refill).

Sundance Spa, a single of the biggest spa makers, utilizes the following error codes.

ILOC = Interlock failure – attainable pump or ozone spike

FLO = Stress switch malfunction or Flow switch malfunction (technique certain).

Hold = Flow Switch (heater is deactivated. Pump could also be deactivated).

Hold = Panel buttons pressed to numerous instances to promptly.

HOT = PCB temperature above acceptable limit – air blower on.

ICE = Possible freeze situation.

PnL = Communication in between the panel and circuit board is faulty.

(—-) = “WATCHDOG” (spa is deactivated) A dilemma has been detected. (technique can not determine)

Sn1 = OPEN SENSOR (heater is deactivated) or SHORTED SENSOR (spa is deactivated).

Sn3 = OPEN SENSOR OR SHORTED SENSOR ( heater disabled).

(This is not a full list and your spa error codes could differ based on year and model.)

Notice the similarities and variations in the codes. Each use FLO,SN1,SN3 and ICE and so forth, Variations incorporate, (—-). Which means completely various factors in between the two systems. You have to use the error codes for your manage technique to accurately diagnose the dilemma with your spa.

Lets take a speedy appear at the FLO error code. Each makers state FLO is brought on when a stress switch malfunctions or a flow switch malfunctions. This can be the case in numerous conditions, on the other hand, it is my knowledge that the quantity a single trigger of a spa displaying the error code “FLO” is due to a dirty or worn out filter.

(Some makers try to narrow down the FLO error with various displays of the code, i.e., a strong FLO or a flashing FLO (FLO error blinks off and on).

Blinking FLO = Heater has been deactivated, pump is on and Flow / Stress switch are open. (This signifies the technique detects the spa has referred to as for heat, the Computer board has applied energy to the pump, but it has not detected water flow. It deactivates the heater to stay clear of harm to the heater).

Strong FLO = Pump is off, flow or stress switch is closed. (Which means, the technique really should not be detecting water flow since the Computer Board has not applied energy to the pump, but the flow stress switch is saying there is water flow. The flow or stress switch is stuck in the closed position or shorted.)

A dirty or worn out filter can trigger many error codes to be displayed. “OH” (more than heat) since water is not moving promptly adequate by means of the heater vessel and the higher limit detects as well hot of water temperature. “FLO” since the filter will not permit adequate water by means of the heater vessel to activate the flow or stress switch. Filters really should be replaced about annually or bi-annually if you use two various filters. Filters really should be rinsed completely just about every month, and cleaned effectively just about every three months or so.

For a lot more info on error codes for your spa, go to Spa Components Provide or make contact with your spa manufacturer for a list of codes that pertain to your spa. When in doubt, get in touch with a spa service technician for troubleshooting support and repair.