| Quick facts | Answer |
|---|---|
| Cost range | Simple fixes are often in the lower hundreds; pump or heater parts cost more |
| Time | Simple flow fixes can take under an hour; parts replacement takes longer |
| Who's qualified | Spa technician or licensed electrician; ask for proof of insurance |
What causes a FLO error?
FLO commonly points to a dirty filter, an air lock after refilling, a weak pump, or a stuck pressure switch. On some spa systems, FLO means no flow is detected while the main pump is running. Check the filter, pump, any blockage, air lock, and water level first.
What causes an OH error?
OH means overheat or overheating protection, and the spa should not be used while the code shows. Recurring trips can indicate a failing temperature probe or restricted flow. Some manufacturers advise checking the sensor when the water is not actually hot, since the fault may be electrical.
What should I do first when FLO or OH appears?
Clean the filter, top up the water, and clear any air lock, because many codes trace back to flow problems. For OH, take the cover off and let the water cool before restarting. Error codes vary by manufacturer and model, so check your owner's manual for the exact meaning.
Does Asheville's climate affect these codes?
Asheville's humid summers, with 69% mean humidity and July as the muggiest month, can make overheating faults show up more often. Winter lows near 28°F also make freeze protection and flow checks important. Moisture exposure is a practical maintenance concern in this wet climate.
What to do next
- Clean the filter and check the water level, then clear any air lock and restart the tub.
- If OH appears, remove the cover and let the water cool fully before you try again.
- Ask the pro for proof of insurance and confirm any electrical work is done by a North Carolina licensed electrician.
- Ask for a quote that separates the diagnostic fee from parts, since troubleshooting is often priced apart from parts.
- Call (828) 484-4530 or email [email protected] for a free quote from an independent, insured spa technician.
AVL Hot Tub is a free referral service: an independent contractor does the work and may pay us a referral fee. You never pay us anything.
