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Low speed pump (and air blower if so equipped) will activate to assist in lowering temperature. OH = High temperature condition, has reached 110☏. Low speed pump and heater will activate until spa reaches 65☏. If water temperature drops 20☏ below set temperature, low speed pump and heater activates to bring temperature within 15° of set temperature. Switch closed while pump is deactivated.ĬOL = Cool condition. Check for clogged filter.įL2 = Pressure switch problem. Check for proper spa water level and ensure pump is primed. Heater is deactivated.įL1 = Water flow problem, inhibited or pressure switch malfunction. Sn1 = Nonfunctional high temperature sensor. Sn3 = Open or shorted sensor ( heater disabled).įLO2 = Closed or shorted flow switch on system startupįL = Flow/pressure switch stuck in closed position Sn1 = Open sensor (heater is deactivated) or Shorted sensor (spa is deactivated). = "Watchdog" (spa is deactivated) A problem has been detected.

PnL = Communication between the panel and circuit board is faulty. HOT = Circuit Board temperature has exceeded acceptable limit. Hold = Panel sensors have been pressed too many times in a short period of time. OH = Overheat Protection (Heater is deactivated, pumps low speed is activated).ĬOOL = Spa water is more than 20° F cooler than the temperature set point.įLO* = Flow Switch (heater is deactivated. Heater is deactivated.įLO = Pressure switch failure, switch openįLC = Pressure switch failure, switch closed SN = Non functional high temperature sensor. OH = Overheat 108° F, spa is deactivated. Th3/39 = On startup indicates water temperature less than 39° F. Th2/current temperature = On startup indicates temperature probe problem. Th1/39 = On startup indicates temperature probe problem. SE = Spa operating in Standard-in-Economy Mode. (Displays when first powered up after refill). ILOC = Interlock failure - possible pump or ozone spike. Pr = When spa is first actuated, it will go into Priming Mode. (Displays on third occurrence of "dr" message). Heater is shut down, but other spa functions run normally.ĭr = Inadequate water detected in heater.ĭry = Inadequate water detected in heater. (Displays on the 5th occurrence of "HFL" message with 24 hours). HFL = Substantial difference between temperature sensors detected. If display shows only this message (blinking) spa is shut down. If alternating with temp, may be temporary condition. Sensor plugged into jack B is not working. Sensor plugged into jack A is not working. ICE = Potential freeze condition has been detected

One sensor has detected 110☏.įlo = Improper flow or pressure switch malfunction One sensor has detected 118° F at heater. Pd = Power supply, unit running on battery backup (used by LifeCast Spas and many other hot tubs)

PSoH = Pressure switch open with high pump. PSoL = Pressure switch open with low pump. PSoC = Pressure switch open with circulating pump.

Heater disabled but the spa is operational. Hi limit sensor is disconnected or shorted or the spa temperature is above 112° F. Do not use spa when temperature is flashing or the OH message is displayed. The low speed pump or circ pump will operate continuously until the temperature rises above 45° F. Refer to your owner's manual.ĬoLd = Temperature in the spa heater housing is below 40° F. We make no representation as to the accuracy or completeness of this data and aren't responsible for errors or omissions. You can often determine the make of the control system by looking inside the spa's equipment area.ĭisclaimer: Although we hope this information will be useful, error codes are subject to change without notice. Note: The control system brand name is usually different from the hot tub brand name. Wondering what your spa is trying to tell you? Below is a list of common error codes from the top manufacturers of control equipment for hot tubs.