Help! My hot tub isn't working
Uh-oh. You’ve gone to get in your hot tub and it’s flashing an error code.
What do you do?
Most of these problems will have a simple fix. The error code flashing usually indicates what the problem is. In many cases you can fix these yourself. And if not, a trained hot tub technician will be able to assist.
Coast Spas and Northwind hot tub error messages
Although the topside controls look slightly different. Both Coast Spas and Northwind use the same control board and display the same error messages.
The table below, shows the most common Coast Spas and Northwind hot tub error messages. Plus, the likely cause and how to fix them in a few simple steps.
|Error Message||Probable Cause||Recommended Action|
|No message on display.|
Power has been cut off to the spa.
|The control panel will be disabled until power returns. Spa settings will be preserved until next power up.|
|- -||Temperature unknown.||After the pump has been running for 2 minutes, the current water temperature will be displayed.|
|HH||"Overheat" - The spa has shut down. One of the sensors has detected 47.8 degrees 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 the hot tub does not reset, shut off power to the spa and call your supplier for a service.
|OH||"Overheat" - The spa has shut down. One of the sensors has detected that the spa water is at 43.5 degrees C.||DO NOT ENTER THE WATER. |
Remove the spa cover and allow water to cool. At 41.7 the spa should automatically reset. If spa does not reset, shut off power to the spa and call your supplier for a service.
|SA||Spa has shut down. The sensor that is plugged in 'A' jack is not working.||If the problem persists call your supplier for service. (May appear temporarily in response to an overheat condition).|
|Sb||Spa has shut down. The sensor that plugs into jack 'B' is not working.||If the problem persists, contact your supplier for a service. (May appear temporarily in response to an overheat condition).|
|Sn||Sensors are out of balance. If alternating with spa temperature, it may just be temporary. If flashing by itself the spa has shut down.||If problem persists, contact supplier for service.|
|HL||A significant difference between temperature sensors has been detected. This could indicate a flow problem.||If the water level is normal, make sure all pumps have been primed. |
If problem persists contact your supplier for a service.
|LF||Persistent low flow problems. (Displays on the 5th occurrence of message in 24 hours). Heater has shut down, but other spa functions continue to run normally.||Follow action required for the (HL) message. Heating capability of the spa will now reset automatically. You may press any button to reset.|
|dr||Possible inadequate water, poor flow, or air bubbles detected in heater. Spa has shut down for 15 mins.||If the water level is normal, make sure all pumps are primed. |
If problem persists, contact your supplier for a service.
|dY||Inadequate water detected in the heaters (displays on 3rd occurrence of message). Spa is shut down.||Following action required for (dr) message. Spa will not automatically reset. Press any button to reset manually.|
|IC||'Ice' - potential freeze condition detected. *Even when spa is shut down, some equipment will turn on if freeze protection is needed.||No action required. All equipment will automatically activate regardless of spa status. The equipment stays on for 4 mins after the sensors detect that the spa temperature has risen to 7.2 degrees C. An optional freeze sensor may be added to protect against extraordinary freeze conditions. Auxiliary freeze sensor protection is advisable for colder climates. See your supplier for details.|
If these fixes aren’t doing the trick, then you may have a more serious problem.
We recommend that after following the above steps you get in touch with your local Coast Spa dealer, or the company that looks after your hot tub. Let them know what error code is flashing up and they should be able to help get your hot tub back up and running.