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Spa Error Codes - The Big List

This content was previously featured on the Hot Tub Works website. Leslie's is proud to partner with Hot Tub Works to bring you this helpful content on lesliespool.com.

spa and hot tub error codes

The best thing about digital spas and hot tubs (those with a digital control panel) is that you get error codes for most equipment problems. Spa error codes can be somewhat cryptic, but when you have the BIG LIST of codes, you can immediately define the two- or three-digit source of trouble.

The biggest problem is that there's not much consistency among the error codes used by different spa manufacturers. Each company uses its own conventions for naming the various system faults.

Hence the need for a BIG LIST of CODES. The alphabetical list of hot tub error codes below covers all major manufacturers of spas and spa controls, including ACC, Balboa, Brett Aqualine, CTI, Dream Maker, EasyPak, Gecko, Hurricane, Hydro-Quip, Jacuzzi Whirlpool, Len Gordon, Maax, Master Spas, Pinnacle, Spa Builders Group, Spa Quip, Sundance, Vita Spas, and others.

Is it an Error Code or a System Status Code?

Not all spa codes are error alerts to inform you of trouble. In fact, many codes are used to provide information about system mode, status, or equipment operation. Some system status codes are identified as well, with the phrase "system message, not an error."

So here it is...

The Big List of Spa and Hot Tub Error Codes


CODE

ERROR CODE DESCRIPTION
* * *  Flow/pressure switch either open or closed
* * * High limit switch is faulty
- - - , - - - - Water dangerously hot, electronic fault, system shut down
-1, -01 High limit fault
-2, -02 Temperature sensor fault
-3, -03 Flow/pressure switch open
-4, -04 Flow/pressure switch closed
-7, -07 High limit fault
--F, --C Temperature unknown
--- "Watchdog;" high limit or temperature sensor fault, water may be dangerously hot. System disabled.
--- On startup, temperature sensor calibration after system restart; system message, not an error
1, 01 Stuck button on keypad
2, 02 No controller data being received
3, 03 Temperature sensor fault
4, 04 Water sensor/pressure switch fault
5, 05 Temperature sensor error, or water is dangerously hot
6, 06 High limit manual reset on heater is tripped
7, 07 Stuck heater relay
9, 09 Water pressure fault; pump may be air locked, or water level low
131 High limit fault, water may be dangerously hot
A1/A2-ER Auxiliary system error; blower, lights, music
AOH Auxiliary system overheating; equipment is running hot or needs air
BJ2P, bJ2P High limit fault, water may be dangerously hot; pump/blower purge (normal condition)
BLB Replace UV bulb
BL-ER Blower error, faulty motor or closed valve
BLO Blower error
C4.4 High limit fault
C Celsius, to indicate panel is in Celsius mode; system message, not an error
Cd, CLd Cold - freezing conditions detected
CE 01 Stuck touchpad button
CE 02 No controller data communication
CE 03 Temperature sensor fault
CE 04 Water sensor/pressure switch fault
CE 05 Temperature sensor, or water is dangerously hot
CE 06 High limit manual reset on heater is tripped
CE 07 Stuck heater relay
CE 08 Temperature sensor fault
CE 09 Water pressure fault; pump may be air locked, or water level low
CL Current time of day; system message, not an error
COL Cool - water is 20°F below set point; system message, not an error
CoLd Cold - water is 40°F or less; system should self-start the circulation pump and heater
Cool, COOL Water is 20°F below set point; system message, not an error
CP-ER Circulation pump error
CP HEET pump error; faulty pump or loose connection
CS Current sensor error
DR, dr, dy, dry Dry - low water volume detected in heater
E### pH probe not calibrated
E0 Short circuit temperature sensor
E1 Open circuit temperature sensor
E2 Short circuit high limit sensor
E3 Open circuit high limit sensor
E4 Short circuit/closed pressure/flow switch
E7 Improper electrical connection
Ecdu, Ecn, Econ Spa is in economy mode; system message, not an error
EO Short circuit temperature sensor
Er0, Er1 Temperature sensor fault
Er2, Er3 High limit fault
Er4 Short circuit/closed pressure/flow switch
err 1 Water pressure fault; pump may be air locked, or water level low
err 3 Stuck button on keypad
err 4 Water sensor/pressure switch fault
err 5 Temperature sensor error, or water is dangerously hot
err 6 High limit manual reset on heater is tripped
err 7 Stuck heater relay
err 8 Temperature sensor fault
Err Software program fault
Error 3 Stuck button on keypad
Error 4 Water sensor/pressure switch fault
Error 5 Temperature sensor error, or water is dangerously hot
Error 6 High limit manual reset on heater is tripped
Error 7 Stuck heater relay
Error 8 Temperature sensor fault
F1, F2 (Vita Spa) Blown fuse; replace fuse 1 or fuse 2
F2 4 hours daily filtration; system message, not an error
F4 8 hours daily filtration; system message, not an error
F6 12 hours daily filtration; system message, not an error
F Fahrenheit, used to indicate panel is in Fahrenheit mode; system message, not an error
FB-ER Fiber optic error; accent lighting
FC Filter continuous mode; system message, not an error
FL1 Water pressure fault; dirty filter, air locked pump, low water level
FL2 Pressure switch fault; switch closed while pump is off
FL Water sensor/pressure switch not working or stuck in closed position; water flow problem
FLC Pressure switch fault; switch closed while pump is off
Fldu Filter cycle duration. Spa is in filter mode; system message, not an error
FLO, FLO*, Flo, FL1 Flow - inadequate water volume sensed by flow/pressure switch; possible switch malfunction
FLO2 Flow - short circuit/closed circuit; pressure/flow switch
FLO (flashing) Flow - short circuit/open circuit; pressure/flow switch
Flon Spa is in filter mode; system message, not an error
FN-ER Fan error; cooling fan fault
FP, Fr, FrE, FrEE Freeze - water is 40° or less; system should self-start pump/heater
GCF Grounding issue; electrical connection not grounded correctly
H2O Water pressure fault; pump may be air locked, or water level low
HC Heater error; replace heater
HFL Temperature sensors out of balance, reporting different results; can indicate a flow problem
HiLi, HLEr Water temperature above acceptable range. High limit sensor reading 118°F or above, or the sensor has tripped - check flow
HL, HH, OHH Water temperature above acceptable range. High limit sensor reading 118°F or above, or the sensor has tripped - check flow
HLoH High limit overheat; spa temp reading 112ºF or greater. High limit sensor may be shorted or disconnected
Hold Panel buttons pressed to many times or too quickly
HOT Overheating, water over 112°F; cool down procedure begins. Do not use spa.
HP High voltage; check power connections
Hr Internal hardware error detected
IC, ICE, ICE2, I CE2 Freezing conditions detected; warm up procedure begins
ILOC Interlock failure; check magnetic contacts on spa equipment door. Possible pump or ozone spike.
L1, L2 Panel lock; enter code to unlock control panel
LB Light error; replace bulb
LF Persistent low flow problems. Heater is off, but other spa functions run normally.
LO Freezing conditions detected; warm up procedure begins
LOC Panel lock; enter code to unlock control panel
LP Low voltage; check connections
LS Water sensor fault
LS=O, LS=S Many causes; improper voltage, open circuit sensor, faulty panel connection, etc.
O3-Er, O3U Ozone error; check for operation and output
OH Overheat; high temperature condition, over 110ºF. Spa may be partially deactivated or low speed pump (and air blower if equipped) may activate to lower temp. Do not use spa.
OHH Overheat; one sensor has detected 118ºF, spa has shut down. Do not use spa.
OHS Overheat; one sensor has detected 110ºF, spa has shut down. Do not use spa.
OP Open circuit sensor
Pb Power board; check topside and remote panel connections to power board
P1, P2 or P3-ER Pump 1, 2 or 3 error or failure
pd Power supply interrupted, unit running on battery backup
PLUG Service technician's test plug connected; system message, not an error
PnL Panel error; communication error between panel and circuit board
Pr Priming - pump is starting; system message, not an error
Prh, PrH High limit sensor failure; temperature sensor fault
Prr Temperature sensor fault
PS Water sensor/pressure switch fault
PSoC Pressure switch open on circulation
PSoH Pressure switch open on high speed
PSoL Pressure switch open on low speed
RH-HR Heater repair error
RH-NC No communication error - panel to board
RH-NF No flow in heater
RH-NH No heat, heater fault or failure
Rly Stuck relay
SA, SnA, SnH, Sb, Snb, Snt Sensor open circuit or faulty
Sby Standby mode; system message, not an error
SC-ER System learning failure
ScLN Self-cleaning filtration mode; system message, not a an error
SE Spa in standard-in-economy mode; system message, not an error
SEoP Sensor open or disconnected; heater disabled but spa operational
SESH Sensor short, nonfunctional; heater disabled but spa operational
SH Short circuit on temperature sensor
Slp Sleep mode; system message, not an error
Sn1 High limit fault, water may be dangerously hot
Sn2 Temperature sensor fault, heater deactivated
Sn3 Temperature sensor fault, heater deactivated
SN Temperature sensor fault, heater deactivated
Sn Sensors out of balance, reporting different results
SnA, Sna Sensor plugged into jack A is not working, spa is shut down
SnB, Snb Sensor plugged into jack B is not working, spa is shut down
SnH High limit circuit open or faulty
SnS Sensors out of balance, reporting different results. If blinking, spa is shut down.
SnT Temperature sensor fault, circuit open or faulty
SP-F1, SP-F2 or SP-F3 Fuse 1, 2 or blown
SP-BR Breaker setting too low
SP-HR Hardware error
SP-IN Input voltage low
SP-OH Overheat - water temp over 112°F
SP-OT Overtemp - air temp around equipment is too hot, lack of air flow
SS Heater sensor fault
SS=O, SS=S Many causes; improper voltage, open circuit sensor, faulty panel connection, etc.
Std Spa in standard mode; system message, not an error
th1/39 Shown on startup, indicates temperature probe error
th2/(temp) Shown on startup, indicates temperature probe error
th3/39 Shown on startup, indicates temperature is less than 39ºF
thl/39 Temperature probe fault
ToE Time out error; contact manufacturer for support
Tu Temperature set Celsius/Fahrenheit; system message, not an error

Do you have a spa or hot tub error code that is not on the list?  You may need to dig out the original owner's manual. If you don't have it anymore, you can sometimes find it in PDF format with a simple search online. Type in the make, model, and year of your hot tub, followed by the word "manual" or "troubleshooting."

In some cases, the errors that pop up require replacement parts in order to fix the root of the problem. If you're not comfortable working with the different plumbing and electrical components in your spa, there's no shame in calling a professional for help. In many cases, a licensed technician is required – DIY repairs can void the warranty.

Remember, always disconnect your spa or hot tub from power sources before starting any repairs!

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