Is your hot tub is making a loud buzzing or grinding noise? Bad news: it’s probably the motor. Besides being obnoxious, this sound also an indicates your hot tub will soon be out of service. Lets walk through the steps to pinpoint the cause of the noise and how to fix it below.
My Breaker is Tripped
Tripped breakers are usually the result of a bad heater or a bad hot tub pump. To determine the cause of the tripped breaker, try disconnecting the heater first, and then flip the breaker. If the breaker still trips with the heater disconnected, disconnect the pump and flip the breaker again. If the breaker does not trip with the pump disconnected, you’ve found the source of the problem – a bad spa pump.
NOTE: If your breaker is tripped but the pump does not hum when you flip the breaker back on, it could just be a bad fuse. In this case, use a multi-meter to test the fuse(s).
If all fuse(s) check out ok, testing the voltage on the back on the motor will verify if the motor is bad. If the motor gets the correct voltage, but doesn’t run, it’s bad.
My Pump is Buzzing/Humming
A steady or intermittent buzzing/humming noise can be an indication of a seized hot tub pump. When the pump is seized, you’ll observe the following:
- Tub will not heat
- Topside shows a code of OH, DR, FLO, or DRY (codes vary depending on equipment system)
- Tub will not circulate
A pump will commonly seize due to worn out bearings or trapped debris/foreign objects. The remedy is replacing the spa pump.
My Pump is Making a Loud Grinding Noise
Motors producing a loud grinding or screeching noise usually have bad bearings. Bearings go bad over time due to wear, tear, and water intrusion.
A loud pump will eventually stop working completely, so order a replacement sooner rather than later to avoid down time.
Note: There are companies that rebuild motors and/or offer rebuild kits. These are often just as expensive, or more, than purchasing a new complete pump and motor.
Spa Pump Lifespan
The average hot tub pump lasts 4-10 years depending on pump quality and how well the water chemistry has been maintained. Low pH, alkalinity or excess bromine/chlorine can all cause early pump failure.
Test and balance your water weekly to protect your spa equipment from unnecessary damage.
Replacing your Hot Tub Pump
Finding a replacement hot tub pump may seem difficult, but it is actually pretty simple. The label on your current spa pump will usually tell you everything you need to know. Gather this information:
- Frame size
- Discharge orientation
- Plumbing size
- Any name brands on the assembly
Some pumps have non-standard plumbing, so you may have to do some fiddling to get a standard pump to fit. If ever in doubt, email us a photo of your motor data label and the pump attached to the motor. We’re always happy to help you find the correct replacement.
When shopping for a replacement pump and motor, pick a well-known brand. Waterway and AquaFlo pumps are best known for quality and durability, but HydroMaster high performance spa pumps take reliability and durability to a new level and are cheaper to boot.
Looking for more information? Read our Complete Guide on Spa Pump Replacement.
Have questions or comments? Post a Comment below!