COMMON HOT TUB ERROR CODE
In our experience one of the most common error codes is “The Heater May Be Dry”, or “OHH”, “DY”, “DR” or similar depending on your model of hot tub.
WHAT CAUSES THIS ERROR CODE?
In most cases, the error is being caused by dirty or clogged filters, and often filters that are just plain old and need to be replaced. As a result, there’s not enough flow so the system thinks the heater is dry and/or might overheat and shuts down the heater.
WHAT SHOULD I DO?
When you get this code, first try removing your filter(s) and clean/spray them off with a garden hose or high pressure nozzle. Avoid a power washer or commercial washer, those can damage the cartridge materials. It’s OK to leave the power on for this “quick clean”, just make sure there’s no leaves or other debris cloating in the water that could get sucked down the filter opening. Put the filters back in and see if the error code goes away. If not, and you know the filters are old, it’s probably time to replace them.
In general, your cartridge filters should be rinsed and sprayed off monthly, and get a deep soak for 4-5 hours every couple months in a filter cleaning solution (except tightly woven “micro-filters”, never rinse or soak those in anything other than water). By doing this, standard cartridge filters can last 12-14 months and micro-filters 3-4 months.
AND IF THAT DOESN’T HELP?
If cleaning and/or replacing the filters doesn’t help, call your local service tech immediately, it could be a sign that something more serious is going on.