Your hot tub is designed to provide years of relaxation, but like any piece of equipment with pumps, heaters, and electronics, things can go wrong. The key is catching problems early — before a minor issue turns into a major (and expensive) repair. Here are seven warning signs that your hot tub needs professional attention.
1. Unusual Noises
A properly functioning hot tub produces a steady, low hum from the pumps and circulation system. If you start hearing grinding, squealing, rattling, or buzzing sounds, something is off. Grinding often points to worn pump bearings. Squealing may indicate a failing motor. Rattling could mean a loose component vibrating inside the cabinet. Do not ignore new sounds — they almost always get worse (and more expensive) if left alone.
2. Water Is Not Heating
This is the most common complaint we get, especially during Spokane's cold months. If your hot tub water is lukewarm or cold despite the thermostat being set correctly, the issue could be a failed heating element, a malfunctioning thermostat, a tripped high-limit sensor, or a circulation pump problem. Sometimes it is as simple as a dirty filter restricting flow to the heater — but if cleaning the filter does not fix it, call a professional.
3. Murky or Discolored Water
Cloudy, green, or foul-smelling water is not just unpleasant — it can indicate a deeper problem. While poor water chemistry is the most common cause, persistent water quality issues even after balancing chemicals can point to a failing filtration system, a circulation pump that is not moving water effectively, or biofilm buildup in the plumbing lines. If standard water treatment is not clearing things up, the spa itself may need servicing.
4. Error Codes on the Display
Modern hot tubs display error codes on the topside control panel when something goes wrong. Common codes include FLO (flow issues), OH (overheating), SN (sensor failure), and DR (dry condition). While some codes can be resolved by resetting the spa or cleaning the filter, recurring error codes typically indicate a component failure that needs professional diagnosis. Do not just keep resetting the breaker — that can cause additional damage.
5. Visible Leaks
Water around the base of your hot tub is never a good sign. Leaks can originate from pump seals, heater unions, jet gaskets, cracked PVC fittings, or even the shell itself. Small leaks tend to get bigger over time, and water escaping inside the cabinet can damage electrical components, cause corrosion, and promote mold growth. If you notice the water level dropping faster than normal evaporation would explain, have it inspected promptly.
6. Weak or Non-Functioning Jets
Jets that have lost their pressure or stopped working entirely usually point to a clogged filter, an air lock in the plumbing, a failing jet pump, or a broken diverter valve. If only some jets are weak while others work fine, the issue is likely localized — a single clogged jet body or a stuck diverter. If all jets are weak, the pump or filter is the more likely culprit. Either way, weak jets diminish the experience your hot tub is supposed to provide.
7. Hot Tub Is Tripping the Breaker
If your hot tub trips the GFCI breaker repeatedly, do not keep resetting it and hoping for the best. A tripping breaker is a safety mechanism indicating an electrical fault. Common causes include moisture in the heater element, a short in the pump motor, corroded wiring, or a faulty GFCI breaker itself. This is one issue you should never try to diagnose yourself — electrical problems in a water-filled appliance require a qualified technician.
What Should You Do?
If you are experiencing any of these symptoms, here is what we recommend:
- Stop using the hot tub if you notice electrical issues (tripping breakers, sparks, or burning smells). Safety first.
- Check the basics — Clean or replace the filter, verify the water level is correct, and make sure the breaker is fully engaged.
- Call a professional if the problem persists after basic troubleshooting. Many hot tub issues involve electrical components, pressurized plumbing, or sealed systems that require specialized tools and training to repair safely.
The sooner you address a hot tub problem, the less it typically costs to fix. A $200 repair today can prevent a $800 repair next month.