How To Read The Error Codes on Your Hot Tub Display Panel
There are as many as 100 different error codes that can appear on your hot tub display so keep this handy so you know what each one means. Some codes simply reference the temperature is either too cold or too hot (both which can be dangerous), while other codes reflect problems such as an issue with the power supply, broken sensors, or a problem with a switch. Here are the basic codes to guide you the next time you get an error message on your hot tub or spa display.
ACC (Applied Computer Controls) Error Codes
CoLd = Temperature in the spa heater housing is below 40° F. Status of the heater element is unknown. The low speed pump or circ pump will operate continuously until the temperature rises above 45° F.
OH = Over heat. The spa is at a temperature above 108° . Do not use spa when temperature is flashing or the OH message is displayed.
HLoH = Hi Limit Over Heat. Hi limit sensor is disconnected or shorted or the spa temperature is above 112° F.
SEoP = Sensor open or disconnected. Heater disabled but the spa is operational.
SESH = Sensor short, nonfunctional. Heater disabled but the spa is operational.
PSoC = Pressure switch open with circulating pump.
PSoL = Pressure switch open with low pump.
PSoH = Pressure switch open with high pump.
ToE = Time out error. Rare system error. Spa unusable. Contact ACC.
Balboa Error Codes (used by Belize Spas and many other hot tubs)
pd = Power supply, unit running on battery backup
OH = Sensors reading 112-118° F.
OHH = Overheat. Spa has shut down. One sensor has detected 118° Fat heater.
OHS = Overheat. Spa has shut down. One sensor has detected 110°F.
Flo = Improper flow or pressure switch malfunction
Cool = Water temp 20° below set point
ICE = Potential freeze condition has been detected
Sn1 = Hi-limit sensor malfunction
Sn3 = Temp sensor malfunction
SnA = Spa is shut down. Sensor plugged into jack A is not working.
Snb = Spa is shut down. Sensor plugged into jack B is not working.
SnS = Sensors out of balance. If alternating with temp, may be temporary condition. If display shows only this message (blinking) spa is shut down.
HFL = Substantial difference between temperature sensors detected. Could indicate a flow problem.
LF = Persistent low flow problems. (Displays on the 5th occurrence of “HFL” message with 24 hours). Heater is shut down, but other spa functions run normally.
dr = Inadequate water detected in heater.
dry = Inadequate water detected in heater. (Displays on third occurrence of “dr” message). Spa is shut down.
Pr = When spa is first actuated, it will go into Priming Mode.
ILOC = Interlock failure – possible pump or ozone spike .
(—) =Unknown water temperature. (Displays when first powered up after refill).
Std = Spa operating in Standard Mode.
Ecn = Spa operating in Economy Mode.
SE = Spa operating in Standard-in-Economy Mode.
Brett Aqualine Error Codes
OH = Temp exceeds 118° F
Fr = Freeze condition – temp below 40° F
FL = Pressure switch failure
EO = Shorted temp sensor
E1 = Open temp sensor
E2 = Shorted hi-limit sensor
E3 = Open hi-limit sensor
E4 = Shorted flow switch
E7 = Improper electrical connection
CTI Error Codes
th1/39 = On startup indicates temperature probe problem.
th2/current temperature = On startup indicates temperature probe problem.
th3/39 = On startup indicates water temperature less than 39° F.
OH = Overheating, water over 112° F. System will restart when temp. drops.
hot = Overheating, water over 112° F. System will restart when temp. drops.
HL = High limit switch tripped.
Dream Maker Hot Tub Error Codes
OH = Overheat 108° F, spa is deactivated. Do not enter the water.
FL = Flow. Pressure switch is not working.
SN = Non functional high temperature sensor. Heater is deactivated.
F2 = 4 hours daily filtration
F4 = 8 hours daily filtration
F6 = 12 hours daily filtration
FC = continuous filtration
EasyPak Error Codes
C = Celsius
CL = Current Time of Day
ECdu = Economy Mode Duration
Econ = Economy Mode Turn On
F = Fahrenheit
Fldu = Filter Cycle Duration
Flon = Filter Cycle Turn On
FLC = Pressure Switch Alarm
FLO = Pressure Switch Alarm
FrEE = Freeze Protection Alarm
HL = High Temperature Alarm
Loc = Panel / Keypad Locked
PrH = Temperature Sensors Alarm
Prr = Temperature Sensors Alarm
Tu = Temperature Set Celsius
Tu = Temperature Set Fahrenheit
Gecko Error Codes
FLO = Pressure switch failure, switch open
FLC = Pressure switch failure, switch closed
Prr = Temp sensor failure
Prh = Hi-limit sensor failure
HL = Sensor measuring 119° F
FrE = Possible freeze condition detected
Hercules Error Codes
OH = Spa temp exceeds acceptable limits
FLO = Flow problem
ICE = Freeze condition detected
SN1 = Hi-limit sensor failure
SN2 = Temp sensor failure
Hurricane Error Codes
PS = Flow or pressure switch failure
SH = Shorted sensor
OP = Open Sensor
LO = Temp below 60° F – freeze
HL = Temp above 118° F
Hydro-Quip Error Codes
C = Celsius
CL = Current Time of Day
ECdu = Economy Mode Duration
Econ = Economy Mode Turn On
F = Fahrenheit
Fldu = Filter Cycle Duration
Flon = Filter Cycle Turn On
FLC = Pressure Switch Alarm
FLO = Pressure Switch Alarm
FrEE = Freeze Protection Alarm
HL = High Temperature Alarm
Loc = Panel / Keypad Locked
PrH = Temperature Sensors Alarm
Prr = Temperature Sensors Alarm
Tu = Temperature Set Celsius
Tu = Temperature Set Fahrenheit
Jacuzzi Whirlpool Error Codes
OH = Overheat Protection (Heater is deactivated, pumps low speed is activated).
COOL = Spa water is more than 20° F cooler than the temperature set point.
FLO* = Flow Switch (heater is deactivated. Pump may also be deactivated).
Hold = Panel sensors have been pressed too many times in a short period of time.
HOT = Circuit Board temperature has exceeded acceptable limit.
ICE = Freeze protection. No action is necessary.
I CE2 = Freeze protection. No action is necessary.
PnL = Communication between the panel and circuit board is faulty.
—- = “Watchdog” (spa is deactivated) A problem has been detected.
Sn1 = Open sensor (heater is deactivated) or Shorted sensor (spa is deactivated).
Sn3 = Open or shorted sensor ( heater disabled).
FLO2 = Closed or shorted flow switch on system startup
Pinnacle Error Codes
OH = Temperature has exceeded 110° F
SN = Sensor failure
FL = Flow/pressure switch stuck in closed position
Spa Builders Error Codes
Sn1 = Nonfunctional high temperature sensor. Heater is deactivated.
Sn2 = Nonfunctional temperature sensor. Heater is deactivated.
FL1 = Water flow problem, inhibited or pressure switch malfunction. Check for proper spa water level and ensure pump is primed. Check for clogged filter.
FL2 = Pressure switch problem. Switch closed while pump is deactivated.
COL = Cool condition. If water temperature drops 20°F below set temperature, low speed pump and heater activates to bring temperature within 15° of set temperature.
ICE = Freeze condition. 55°F detected. Low speed pump and heater will activate until spa reaches 65°F.
OH = High temperature condition, has reached 110°F. Do not enter the spa. Low speed pump (and air blower if so equipped) will activate to assist in lowering temperature.
— = “Watchdog”. Water temperature has reached 118°F. Entire system is disabled. Contact qualified service technician.
Sundance Spas
ILOC = Interlock failure – possible pump or ozone spike
FLO = Pressure switch malfunction or Flow switch malfunction (system specific)
Hold = Panel buttons pressed to many times to quickly
HOT = PCB temperature above acceptable limit – air blower on
ICE = Potential freeze condition
Pnl = Communication between PCB and panel interrupted
Sn1 = Hi-limit sensor failure
Sn3 = Temp sensor failure
—- = “Watchdog” (spa is deactivated) A problem has been detected
Vita Spas Error Codes
HiLi = Water temp over acceptable limit
BJ2P = Pump/Blower purge – normal condition
FP = Freeze protect-temp under acceptable condition
SS=0; SS=S; LS=O; LS=S = Multiple causes; open sensors, bad connection to panel, improper voltage, etc.
If the code your seeing can’t be replaced consider quote on a newer, better model.
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