Hot tub & spa or whirlpool bath troubleshooting & repair:
This article describes the diagnosis & repair of common hot tub or spa problems at the blower unit, the spa or hot tub filter, including filter leaks, spa or hot tub heater repairs, hot tub or spa jet repairs, hot tub and spa motor or wet end troubleshooting & repair or replacement, and fixing other leaks at a hot tub or spa.
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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Air is delivered to hot tubs or whirlpool baths in one or sometimes two methods:
Below at left in the photo taken from underneath the tub rim we see the plastic tube that connects the pneumatic switch on the tub side to the electrical control that in turn will switch on the blower motor. The right-hand switch and plastic tube controls the speed of the water circulating pump.
Below we see these two plastic tubes at their connection to the electrical controls below the tub. The tube from the tub rim blower switch connects to the blower switch relay on the electrical control box below the tub while the pump switch, as we noted, will control the water circulating pump speed.
Check the hot tub controls' pneumatic tubing: If your whirlpool or spa has a blower unit an it's not turning on, check below the tub, following the plastic tubing, to be sure that it is connected at both ends and that it has not been crimped, cut, or perforated.
Replace a bad blower control switch: Next (below) we show the two pneumatically-operated electrical switches inside the control box shown just above. In effect, the user is pushing a button that compresses air in the switch and tubing system that in turn operates an electrical switch inside the control box.
This safety feature avoids having people floating about in a hot tub having to touch an electrical switch directly - touching an electrical control directly while wet or in a tub is likely to kill you.
The blower switch and pump switch mounted in this spa /hot tub control are pneumatic devices that can fail and may need replacement. Below is a close-up of one of these that has been removed from the controller.
This pneumatic switch, model TBS212 is produced by Tridelaga Industries, Mentor OH 44060.
Check the air blower motor assembly: Below we see the actual blower unit for this hot tub/spa. You can ignore that spare filter atop the blower. It was so dirty that we threw it away.
This blower was so noisy we left it off. Further investigation and repair are in order. The blower unit shown is a Santanna Conger Brothers unit.
Watch out: notice that open electrical box with two yellow twist-on wire connectors? Touching these, especially while you're wet and standing on a wet floor, is asking for death by electrocution. We need to install a cover on this electrical box.
We moved this discussion to a new page. Please see SPA / HOT TUB FILTER LEAK REPAIR
Separately at SPA / HOT TUB FILTER REPLACEMENT you can see details of installing this new filter cover and checking the new installation for leaks.
Watch out: when ordering hot tub or spa parts such as the filter canister cover be sure that you also order the necessary o-rings, seals, gaskets. Typically the filter cover is sold bare without the needed seals.
If your hot tub or spa heater is not heating properly see details at SPA / HOT TUB HEATER REPAIR
The Heat Wave II hot tub / spa heater shown above was produced by Hot Water Products, 5542 Research Drive, Huntington Beach CA 92649, USA, Tel: 714-891-5509
2016/02/29 Terry said:
Spa bath has no flow from one of 10 jets?
This question was posted originally at SPAS WHIRLPOOLS SOAKING & JETTED TUBS
When only one jet is misbehaving and the other 9 are working, we can eliminate a worry about the pump, timer, or controls.
First and most important: check for a disconnected and leaky tube feeding the non-performing jet. Remove the tub access panel and with power to the tub OFF to avoid shock risk, look with care for signs of water or flooding under and around the unit.
While looking under the tub from its access side, I'd inspect for a clogged or crimped tube to that jet.
Next, as on some spas the jet assembly can be removed from the tub side, see if you can disassemble and clean it, looking for a blockage.
Armed with the brand and tub model, if you don't have the owners' manual, download one from the manufacturer. Most spa manuals include a troubleshooting guide at the end of the document. There may be specific clogged jet advice from your manufacturer.
1. The filter unit: see if air needs to be bled from the filter. Typically there is an air bleeder screw or valve that can be opened at the top of the filter unit.
2. If there are more than one intake port in the tub be sure the water intake is not clogged with hair and debris.
This topic has been moved to SPA / HOT TUB PUMP REPAIR
Leak points at a spa, hot tub or jetted are described at SPA / HOT TUB LEAKS
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Questions & answers about installing, troubleshooting, fixing hot tubs, spas, & hydro massage tubs posted originally at SPA HOT TUB WHIRLPOOL REPAIRS
On 2017-07-12 by (mod) re: why no water comes out of the tub spout of a hydro massage tub
I agree with you - normally the pump's job is just to circulate water from in the tub through tubing and back out jets back into the tub. I don't know of a hydromassage tub whose incoming water would run first through its circulating pump.
You can contact Hydromassage directly for more help at
Hydro Massage Products, 505 Nucla Way, Aurora Colorado 80011
Phone: (303) 341-1845 • Fax: (303) 341-1850
www.hydromassageproducts.com • firstname.lastname@example.org
and I'll add a link to their installation manual in REFERENCES section of the article above - http://inspectapedia.com/plumbing/Spa_Hot_Tub_Diagnosis.php#reviewers
However nothing I read in that guide suggested that your plumber is right. I think there must have been a mis-communication.
On 2017-07-12 by Sarah
I have a hydromassage bathtub in a newly purchased house (I've never used it). The water from the tub faucet only trickles out. I called a plumber and they said that the bathtub is not filling because the pump is not working. Does this make sense? I did not think the pump would have anything to do with just filling the tub with water.
On 2017-06-13 by (mod) re: hot tub was kicking off the circuit breaker
Excellent going David, do keep me posted; if you want to send along photos of what you found I'd be interested in seeing it, and that info may help other readers.
On 2017-06-13 by David
I may have found the problem just after asking the question. Right after getting the hot tub, it was kicking the breaker. The dealer sent a tech out and they took the ozonator out of line.
They plugged off the tube with a slotted tube. Maybe the reason was to allow air but, I think this is where it would suddenly drain maybe due to pressure. Thanks for the fast response. I will post an update as my fingers are crossed.
On 2017-06-12 by (mod) re Captiva hot tub. It will hold water for months and then suddenly loose water.
Interesting question. It does sound as if a relay or control is sometimes failing.
I would remove the access panel(s) and look under and around the tub with care. You should see water marks that track back to the point of leakage. You're welcome to send me photos (page bottom CONTACT link) for further comment.
On 2017-06-11 by David
I have a Captiva hot tub. It will hold water for months and then suddenly loose water. It can be refilled and again stay completely full and seems like just over night, it will be empty. I suspect the heater. Any suggestions would be appreciated.
On 2017-05-19 by (mod) re: what do the tubes do on a spa or hot tub
I am flying blind, at night, in a fog here, having no information about what sort of tube, its locations, connections. If the tube is under or inside the mechanicals area of the tub, my guess is that it was intended to connect a pneumatic tub control button or switch to a control or switch in the mechanicals of the tub that turns something on or off: an aerator, motor, etc.
Tubing is also used to deliver air to jets and of course larger tubing moves water.
On 2017-05-18 by Julie
I've a new whirlpool bath and seem to have a loose small clear tube any ideas not been used yet
On 2017-05-02 by Steve
I have a jacuzzi tub model LE35 and when I push the start button I hear the motor hum but the motor doesn't run it just hums
On 2017-04-24 by (mod) re: water leaking at tub jets
If the tub water leaks out at the jets one of them is leaking - as Anon discussed below.
If water continues to leak out of the tub when it is below the jets, then I suspect that the drain is not closing. Diagnose that by placing a flat rubber sink-stopper as a drain closure over the drain opening.
On 2017-04-24 by (mod) re Americast Stratford whirlpool tub front left jet leaking
YOu'll need access to the tub wall from both sides -perhaps through the removable panel. You may be able to seal the jet into the tub wall with a neat application of silicone sealant but first let's find out exactly what's leaking.
On 2017-04-24 by Anonymous
Americast Stratford whirlpool tub front left jet leaking.
leaking outside of unit.
On 2017-04-23 Americast Stratford whirlpool tub front left jet leaking
I recently cleaned my jetted bathtub and now the tub will not hold water. It seems to be draining from the water intake (?) not sure what it is but it is located on the side of tub near the bottom. I'm not sure what are the gadgets are, but there is that drain and then another knob near the upper edge of the tub that opens and closes. I can hear the water draining out as soon as it reaches the one near the bottom.
On 2017-04-18 by (mod) What causes jet tub to stop after approx.30min. of use?
A timer, or perhaps a motor that's overheating.
On 2017-04-18 by Ike Burant
What causes jet tub to stop after approx.30min. of use?
On 2017-04-18 by (mod) What causes leaks when the tub isn't in use
Look for a leak in water supply piping to the tub
On 2016-10-13 by Anonymous
Water keeps leaking under my whirpool tub even tho no water on the tub
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