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Hot Tub Error Codes (List of Common Errors)

Common Hot Tub Errors

When your hot tub malfunctions, there can be a number of error codes that appear on your control panel. The error code is a specific number that identifies what the error is to your spa system. Each one means a different thing, and we are here to explain those flashing light error codes, common error codes, and recommendations on how to take corrective action on all of them. 
 

List of Hot Tub Error Codes

Error Codes that appear on your hot tub can be anything from overheating (OHH) and freezing condition (ICE) to malfunctioning sensors, low flow, temperatures and more. You'd be surprised how many can appear, and that there are actions you can take to help troubleshoot many of them. We have a list below of general error codes for your Master Spa, as well as Error Codes specific to your hot tub. Here are the most common hot tub error codes:
 



Master Spas General Error Codes (Diagnostic and Periodic Reminders)

 
Error Code Meaning What To Do
  No message on display. Power has been cut off to the spa. The control panel will be disabled until power returns. Time of day will be preserved for 30 days on your system. Spa settings are preserved on all systems.
-- Temperature not current in Economy or Sleep mode In Economy or Sleep mode, the pump may be off for hours outside a filter. If you wish to see the current spa temperature, either switch to Standard mode or turn Jets 1 on for at least two minutes.
--C Temperature unknown. After the pump has been running for 2 minutes, the temperature will be displayed.
--F Temperature unknown. After the pump has been running for 2 minutes, the temperature will be displayed.
dr Inadequate water detected in heater Check water level in spa. Refill if necessary. If the water level is okay, make sure the pumps have been primed. Press any button to reset.
dry Inadequate water detected in heater. (Displays on third occurrence of “dr” message.) Spa is shut down. Follow action required for “dr” message. Spa will not automatically reset; you may press any button to reset
HFL A substantial difference between the temperature sensors was detected. This could indicate a flow problem. Check water level in spa. Refill if necessary. If the water level is okay, make sure the pumps have been primed. If problem persists, contact your dealer or service organization. Check for dirty filters and clean if necessary
ICE “Ice” - Potential freeze condition detected. No action required. The pumps will automatically activate regardless of spa status.
LF Persistent low flow problems. (Displays on the fifth occurrence of the “HFL” message within 24 hours.) Heater is shut down, but other spa functions continue to run normally Follow action required for “HFL” message. Heating capacity of the spa will not reset automatically; you may press any button to reset.
OHH “Overheat” - The spa has shut down. On some systems, an alarm may sound. One of the sensors has detected 118˚F (approx. 47.8˚C) at the heater. Do Not Enter The Water. Remove the spa cover and allow water to cool. Once the heater has cooled, reset by pushing any button. If spa does not reset, shut off the power to the spa and call your dealer or service organization
OHS “Overheat” - The spa has shut down. One of the sensors has detected that the spa water is 110˚F (approximately 43.3˚C). Do Not Enter The Water. Remove the spa cover and allow water to cool. At 107˚F (approx. 41.7˚C), the spa should automatically reset. If spa does not reset, shut off the power to the spa and call your dealer or service organization.
Pr When your spa is first actuated, it will go into Priming mode. See the M-7 Installation Instruction Manual for complete instructions on Power-up and Pump Priming. The Priming mode will last for up to 4 minutes and then the spa will begin to heat and
rCO Every 180 days Clean and condition wood per manufacturer’s instructions.
rCH Every 365 days Install new filter.
rCL Every 30 days Remove, clean, and reinstall filter per manufacturer’s instructions.
rdr Every 90 days Drain and refill spa per manufacturer’s instructions
rPH Every 7 days Test and adjust ph chemical levels per manufacturer’s instructions.
rSA Every 7 days Test and adjust sanitizer chemical levels per manufacturer’s instructions.
rtr Every 180 days Clean and condition wood per manufacturer’s instructions.
rt9 Every 30 days Test and reset GFCI per manufacturer’s instructions.
SbY Standby Mode has been activated by pressing a button combination on the user panel. Press any button to leave Standby mode and return to normal operation.
SnA Spa is shut down. The sensor that is plugged into the Sensor “A” jack is not working. If the problem persists, contact your dealer or service organization. (May appear temporarily in an overheat situation and disappear when the heater cools.)
Snb Spa is shut down. The sensor that is plugged into the Sensor “B” jack is not working. If the problem persists, contact your dealer or service organization. (May appear temporarily in an overheat situation and disappear when the heater cools.) If the problem p
SnS Sensors are out of balance. If this is alternating with the temperature, it may just be a temporary condition. If the display shows only this message (periodically blinking), the spa is shut down. If the problem persists, contact your dealer or service organization.

 

Master Spa Legend Series (LSX 557) Error Codes

 

Error Code Meaning What To Do
  No message on display. Power has been cut off to the spa. The control panel will be disabled until power returns. Time of day will be preserved for 30 days on your system. Spa settings are preserved on all systems.
-- Temperature is unknown. After the pump has been running for 2 minutes, the temperature will be displayed.
dr Possible inadequate water, poor flow, or air bubbles are detected in the heater. Spa is shut down for 15 minutes. Check water level in spa. Refill if necessary. If the water level is okay, make sure the pumps have been primed. Press any button to reset, or this message will automatically reset within 15 minutes. If problem persists, contact your dealer or service provider.
dY Inadequate water detected in heater. (Displays on third occurrence of “dr” message.) Spa is shut down. Follow action required for “dr” message. Spa will not automatically reset; you may press any button to reset.
HH “Overheat” - The spa has shut down. One of the sensors has detected 118˚F/48˚C at the heater. Do Not Enter The Water. Remove the spa cover and allow water to cool. Once the heater has cooled, reset by pushing any button If spa does not reset, shut off the power to the spa and call your dealer or service organization.
HL A significant difference between the temperature sensors has been detected. This could indicate a flow problem. Check water level in spa. Refill if necessary. If the water level is okay, make sure the pumps have been primed. If problem persists, contact your dealer or service organization. Check for dirty filters and clean if necessary
IC “Ice” - Potential freeze condition detected. No action required. The pumps will automatically activate regardless of spa status.
LF Persistent low flow problems. (Displays on the fifth occurrence of “HL” message within 24 hours.) Heater is shut down, but other spa functions continue to run normally. Follow action required for “HL” message. Heating capacity of the spa will not reset automatically; you may press any button to reset.
OH “Overheat” - The spa has shut down. One of the sensors has detected that the spa water is 110˚F/43˚C. Do Not Enter The Water. Remove the spa cover and allow water to cool. At 107˚F/ 42˚C, the spa should automatically reset. If spa does not reset, shut off the power to the spa and call your dealer or service organization.
SA Spa is shut down. The sensor that is plugged into the Sensor “A” jack is not working. If the problem persists, contact your dealer or service organization. (May appear temporarily in an overheat situation and disappear when the heater cools.)
Sb Spa is shut down. The sensor that is plugged into the Sensor “B” jack is not working. If the problem persists, contact your dealer or service organization. (May appear temporarily in an overheat situation and disappear when the heater cools.)
Sn Sensors are out of balance. If alternating with spa temperature, it may just be a temporary condition. If flashing by itself, spa is shut down. If the problem persists, contact your dealer or service organization.

 

Down East Spas (3-4 pump) Error Codes

 

Error Code Meaning What To Do
  No message on display. Power has been cut off to the spa. The control panel will be disabled until power returns. Spa settings are preserved on all systems.
-- Temperature is unknown. After the pump has been running for 2 minutes, the temperature will be displayed.
dr Possible inadequate water, poor flow, or air bubbles are detected in the heater. Spa is shut down for 15 minutes. Check water level in spa. Refill if necessary. If the water level is okay, make sure the pumps have been primed. Press any button to reset, or this message will automatically reset within 15 minutes. If problem persists, contact your dealer or service provider.
dY Inadequate water detected in heater. (Displays on third occurrence of “dr” message.) Spa is shut down. Follow action required for “dr” message. Spa will not automatically reset; you may press any button to reset.
HFL A significant difference between the temperature sensors has been detected. This could indicate a flow problem. Check water level in spa. Refill if necessary. If the water level is okay, make sure the pumps have been primed. If problem persists, contact your dealer or service organization. Check for dirty filters and clean if necessary.
ICE “Ice” - Potential freeze condition detected. No action required. The pumps will automatically activate regardless of spa status.
LF Persistent low flow problems. (Displays on the fifth occurrence of “HFL” message within 24 hours.) Heater is shut down, but other spa functions continue to run normally. Follow action required for “HFL” message. Heating capacity of the spa will not reset automatically; you may press any button to reset.
OHH “Overheat” - The spa has shut down. One of the sensors has detected 118˚F/48˚C at the heater. Do Not Enter The Water. Remove the spa cover and allow water to cool. Once the heater has cooled, reset by pushing any button. If spa does not reset, shut off the power to the spa and call your dealer or service organization.
OHS “Overheat” - The spa has shut down. One of the sensors has detected that the spa water is 110˚F/43˚C. Do Not Enter The Water. Remove the spa cover and allow water to cool. At 107˚F/ 42˚C, the spa should automatically reset. If spa does not reset, shut off the power to the spa and call your dealer or service organization. No action required. The pumps wi
SnA Spa is shut down. The sensor that is plugged into the Sensor “A” jack is not working. If the problem persists, contact your dealer or service organization. (May appear temporarily in an overheat situation and disappear when the heater cools.)
Snb Spa is shut down. The sensor that is plugged into the Sensor “B” jack is not working. If the problem persists, contact your dealer or service organization. (May appear temporarily in an overheat situation and disappear when the heater cools.)
SnS Sensors are out of balance. If alternating with spa temperature, it may just be a temporary condition. If flashing by itself, spa is shut down. If the problem persists, contact your dealer or service organization.

 

Down East Spas (Somerset) Error Codes

 

Error Code Meaning What To Do
  No message on display. Power has been cut off to the spa. No message on display. Power has been cut off to the spa.
-- Temperature is unknown. After the pump has been running for 2 minutes, the temperature will be displayed.
dr Possible inadequate water, poor flow, or air bubbles are detected in the heater. Spa is shut down for 15 minutes. Check water level in spa. Refill if necessary. If the water level is okay, make sure the pumps have been primed. Press any button to reset, or this message will automatically reset within 15 minutes. If problem persists, contact your dealer or service provider.
dY Inadequate water detected in heater. (Displays on third occurrence of “dr” message.) Spa is shut down. Follow action required for “dr” message. Spa will not automatically reset; you may press any button to reset.
HH “Overheat” - The spa has shut down. One of the sensors has detected 118˚F/48˚C at the heater. Do Not Enter The Water. Remove the spa cover and allow water to cool. Once the heater has cooled, reset by pushing any button. If spa does not reset, shut off the power to the spa and call your dealer or service organization
HL A significant difference between the temperature sensors has been detected. This could indicate a flow problem. Check water level in spa. Refill if necessary. If the water level is okay, make sure the pumps have been primed. If problem persists, contact your dealer or service organization. Check for dirty filters and clean if necessary
IC “Ice” - Potential freeze condition detected. No action required. The pumps will automatically activate regardless of spa status.
LF Persistent low flow problems. (Displays on the fifth occurrence of “HL” message within 24 hours.) Heater is shut down, but other spa functions continue to run normally. Follow action required for “HL” message. Heating capacity of the spa will not reset automatically; you may press any button to reset.
OH “Overheat” - The spa has shut down. One of the sensors has detected that the spa water is 110˚F/43˚C. Do Not Enter The Water. Remove the spa cover and allow water to cool. At 107˚F/ 42˚C, the spa should automatically reset. If spa does not reset, shut off the power to the spa and call your dealer or service organization.
SA Spa is shut down. The sensor that is plugged into the Sensor “A” jack is not working. If the problem persists, contact your dealer or service organization. (May appear temporarily in an overheat situation and disappear when the heater cools.)
Sb Spa is shut down. The sensor that is plugged into the Sensor “B” jack is not working. If the problem persists, contact your dealer or service organization. (May appear temporarily in an overheat situation and disappear when the heater cools.)
Sn Sensors are out of balance. If alternating with spa temperature, it may just be a temporary condition. If flashing by itself, spa is shut down. If the problem persists, contact your dealer or service organization.

 

List of Flashing Light Error Codes

As shown above, there are a myriad of error codes your spa can display. Sometimes, those codes are flashing - here is what the flashing light error codes mean:
 
Error Code Meaning What To Do
Sn With Down East Spas, this means that the sensors are out of balance. When flashing, it means that your spa is shut down. If this is happening, contact your spa dealer to troubleshoot.
SnS With Master Spa Legend Series Spas, this means the sensors are out of balance. When flashing, your spa has shut down Contact your spa dealer to help troubleshoot your spa.

 

 

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