Signs of leak at a hot tub or spa pump impeller assembly (C) Daniel FriedmanHot Tub, Spa, Whirlpool Pump Repair
Troubleshoot & Repair Spa / Hot Tub & Whirlpool Bath Pumps

  • SPA HOT TUB WHIRLPOOL REPAIRS - CONTENTS: how to diagnose & repair common problems at hot tubs, jetted tubs, spas, whirlpool baths, soaking tubs: blower unit, filter unit repair, hot tub heater repair, hot tub jet clog repair, other leak repairs
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Hot tub & spa or whirlpool bath circulating pump troubleshooting & repair:

This article describes the diagnosis & repair of common hot tub or spa pump problems including leaks or noises or failure to start or weak pumping at the hot tub or spa motor or wet end.

This article series describes the use, operation, maintenance as well as common problems, troubleshooting, & repair suggestions for hot tubs, spas, and whirlpool baths. We discuss hot tub leaks, broken hot tub or spa jets, hot tub or spa water temperature & heater repair, hot tub or spa pump diagnosis & repair, hot tub or spa filter maintenance, cleaning & repair, noisy air pumps at hot tubs, noisy water pumps at the hot tub or spa, and other hot tub, spa or whirlpool bath diagnosis & repair topics.

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Spa / Hot Tub Pump Repairs

Hot tub or spa pumps are normally sized and piped to permit a complete water turnover rate of about 1/2 hour for the tub's water.

Hot tub / spa pump assembly (C) Daniel Friedman

[Click to enlarge any image]

In hot tub or spa lingo, the pump assembly consists of two principal parts: the pump motor (red arrow in photo below) and the "wet end" or what I prefer to call the impeller assembly (to the left of the green arrow in the photo below

The pump motor drive shaft is connected through an air space (vertical green arrow) to the separate wet end wherein it drives the impeller to actually move water through the spa or hot tub piping system. This spa or hot tub pump type is typically referred to as an "insulated wet-end pump".

Spa or hot tub pump motor (C) Daniel Friedman

This physical separation of pump motor from wet end reduces but does not completely eliminate the chance of water entering the pump motor bearings or motor where water will cause quick pump failure if it doesn't first short circuit and blow the circuit beaker or fuse.

In my photo above the blue arrow is pointing to a start/run capacitor that in this system mounts atop the pump motor itself. See HOW a STARTING CAPACITOR WORKS if the motor shaft is not frozen but the motor hums without starting.

Spa / Hot Tub Pump Leaks

Depending on where the leak is originating and where water has gone, the system may have short remaining life or it may be unsafe to use at all.

Leaks at the Hot Tub or Spa Pump Wet End

Signs of leak at a hot tub or spa pump impeller assembly (C) Daniel Friedman

Above: the white salt deposits around the pump wet end or impeller assembly indicate a history of leaks at this spa pump. It's likely that the impeller or pump seals need replacement.

This is a Hayward Power Flow II two-speed self-priming centrifugal pump, model S48K2A10 Serial No. 7F85 operating at 1/8 - 3/4 hp. A replacement impeller for this pump is Hayward P/N SP 1775-2. But I think the pump impeller assembly needs new seals or bearings, given the leakage we see in the photo below.

The seals in this hot tub / spa pump can be replaced in 12 steps by following instructions in the Hayward operating and use manual for this pump.

Spa or Hot Tub Motor Won't Start

If the pump motor will not start after you've turned on the toggle switch that sends power to the pump (SPA / HOT TUB PUMP OPERATION), check that you've pressed the white pneumatic pump control button on the tub rim. Start the pump in high speed.

If the pump won't start and is silent:

If the pump motor hums but does not start:

Spa / Hot Tub Pump Runs But Does Not Pump Water

If the pump runs but will not prime - the motor spins but water is not exiting the tub jets

Hot Tub or Spa Pump Runs but Water Flow is Weak - poor pump pressure diagnosis

If the pump runs but the water flow rate is low (possibly showing up as heater won't stay on)

Hot Tub / Spa Pump is Noisy


Continue readingat SPA / HOT TUB PUMP OPERATION or select a topic from closely-related articles below, or see our complete INDEX to RELATED ARTICLES below.

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