Jetted Tub Air Switch Guide: Test the Button, Tubing and Pump Relay
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When a jetted tub button stops working, many homeowners immediately assume the pump has failed. However, the problem is often somewhere in the tub’s pneumatic control system.
This guide explains how a jetted tub air switch works, how to determine which component has failed, and what to check before ordering replacement parts.
Shop whirlpool tub air buttons, pneumatic tubing and air switch controls →
What Is a Jetted Tub Air Switch?
A typical whirlpool bathtub uses three separate components to turn its pump or air blower on and off:
| Component | What It Does | Common Failure Sign |
|---|---|---|
| Air button | Creates a short burst of air when pressed. | Sticks, feels weak, or requires repeated presses. |
| Pneumatic tubing | Carries the air pulse from the button to the switch. | Cracks, disconnects, kinks, or leaks air. |
| Air switch or relay | Receives the air pulse and switches electrical power to the equipment. | Clicks without starting the pump or does not respond to a strong air pulse. |
| Pump or control | Operates the whirlpool jets, air blower, or another connected function. | Receives power but hums, trips the GFCI, or does not run. |
The terms air button and air switch are often used interchangeably, but they are not the same part. The button is mounted on the tub. The electrical switch or relay is normally located near the pump, inside a control box, or in a plug-in controller.
How Does a Whirlpool Tub Air Button Work?
- You press the air button mounted on the tub deck.
- The button compresses a small internal bellows and creates an air pulse.
- The pulse travels through pneumatic tubing.
- The air switch converts that pressure into an electrical switching action.
- The pump, blower, or other connected component turns on or off.
The user-operated button normally contains no line-voltage electrical wiring. However, the pump and receiving switch still use electricity and must be properly installed and protected.
Why Won’t My Jetted Tub Button Turn On the Jets?
The symptom you notice can help narrow down the failed component.
| Symptom | Possible Cause | First Check |
|---|---|---|
| Nothing happens when the button is pressed | No power, loose tubing, damaged button, or failed air switch | Breaker, GFCI, tubing connections, and air pulse |
| The switch clicks but the pump does not run | Failed relay contacts, wiring problem, or pump failure | Stop and have the electrical side tested |
| It takes several presses to start | Air leak, loose hose, worn button, or excessive tubing length | Inspect the complete tubing path |
| The pump runs only while the button is held | Momentary switch installed where latching operation is required | Confirm the original switch function |
| The jets start or stop without being pressed | Damaged button, faulty relay, or compromised tubing | Disconnect power until the problem is diagnosed |
If the GFCI or breaker trips repeatedly, do not continue resetting it. Repeated tripping can indicate a pump, wiring, moisture, or grounding problem that requires proper diagnosis.
How to Test a Jetted Tub Air Button and Tubing
You can usually separate an air-button problem from a pump or relay problem without replacing parts at random.
- Confirm that it is an air button. A pneumatic button has a small air tube connected underneath it. Electronic keypads use electrical cables and require a different troubleshooting process.
- Disconnect power. Switch off the breaker or unplug the tub equipment before opening the access area.
- Locate the access panel. It may be in the tub apron, an adjoining closet, the wall behind the tub, or the ceiling below it.
- Inspect both tubing connections. Make sure the tube is attached securely at the button and at the receiving switch.
- Check for cracks and kinks. Brittle, split, pinched, or water-filled tubing can weaken the pressure signal.
- Test the air pulse. With power off, disconnect the tube at the receiving switch and press the tub button. You should feel a distinct pulse of air at the open end.
If the pulse is weak or missing, the problem is likely the button, tubing, or one of its connections. If the air pulse is strong but the switch does not respond after reconnection, the switch or relay may have failed.
Never use high-pressure compressed air to test the system. Excessive pressure can damage the button or switch diaphragm.
Cracked or hardened hose can be replaced with correctly sized 1/8-inch ID air switch tubing when that size matches the original installation.
Momentary vs. Latching Air Switches
The tub-mounted air button normally produces only a momentary air pulse. What happens afterward depends on the receiving switch:
- Latching on/off switch: One press turns the pump on. The next press turns it off. This is common on basic whirlpool bath pumps.
- Momentary switch: The circuit operates only while the button is pressed.
- Sequencing switch: Repeated presses cycle through multiple speeds or functions.
- Timed controller: One press starts the equipment for a preset operating period.
Do not replace a switch based only on its appearance. The replacement must match the original operating function and the electrical requirements of the connected equipment.
How to Choose the Correct Replacement Air Button
Before ordering a whirlpool tub air button replacement, verify:
- Manufacturer and part number, when available
- Tub mounting-hole diameter—not only the visible cap diameter
- Thread length and mounting depth
- Button profile, color, and finish
- Pneumatic tubing inside diameter and connection type
- Available access beneath or behind the button
- The pump, blower, or control system being activated
Whirly Bros carries white, chrome, low-profile, and model-specific options in our Air Buttons & Manual Tub Controls collection .
Can I Replace Only the Air Button?
Yes. If the pump operates correctly and the receiving air switch responds to a proper air pulse, you may only need to replace the air button or tubing.
A typical air-button replacement involves:
- Turning off power to the tub equipment
- Accessing the underside of the existing button
- Photographing the original mounting and tubing connection
- Disconnecting the air tube and removing the mounting nut
- Installing a replacement that matches the existing hole size
- Reconnecting the tubing without kinks or excessive slack
- Restoring power and testing the system
Do not pry the complete air button from above without checking how it is secured. Many buttons use a retaining nut underneath the tub deck.
If the electrical air switch or relay requires replacement, confirm its voltage, amperage, pole configuration, and operating action. For a basic compatible system, see our whirlpool pump air switch relay . Electrical compatibility must be verified before installation.
Jetted Tub Air Switch FAQs
Is the button on my jetted tub electrical?
A true pneumatic air button normally contains no line-voltage wiring. It sends air pressure through tubing to a remotely located electrical switch. Some electronic keypads resemble air buttons, so inspect the connection before ordering.
Why does my air switch click but the pump does not start?
A click generally means the air signal reached the switch. The problem may be failed relay contacts, loss of electrical power, wiring, a tripped GFCI, or a failed pump motor.
Can old air tubing stop a whirlpool pump from starting?
Yes. Loose, cracked, pinched, or hardened tubing can allow the pressure pulse to escape before it reaches the air switch.
Are jetted tub air buttons universal?
No. Many use similar pneumatic tubing, but mounting-hole size, thread length, button profile, and connection design can differ. Always compare measurements and the original part.
How long does a whirlpool tub air button last?
There is no dependable universal lifespan. Frequency of use, heat, moisture, chemical exposure, and the condition of the tubing all affect service life. Replace the component when it becomes cracked, stuck, or unable to produce a reliable air pulse.
Can an air button control both a pump and an air blower?
An air button can activate different equipment depending on the connected switch or control box. The same button does not automatically make the receiving controller compatible with every pump or blower.
Need Help Identifying the Correct Part?
Whirly Bros specializes in replacement pumps, air buttons, pneumatic tubing, and control components for jetted tubs, whirlpool bathtubs, and walk-in tubs.
For matching assistance, send us clear photos of:
- The top and underside of the air button
- The tub mounting hole or retaining nut
- The pneumatic tubing and both connections
- The pump or control-box identification label
Shop all air buttons and manual tub controls , or call or text (951) 897-1878 for help confirming compatibility before you order.
Updated July 22, 2026. Replacement guidance based on common pneumatic controls used in whirlpool bathtubs and walk-in tub systems.
Manufacturer names and part numbers are used only for compatibility identification. Unless specifically stated, replacement parts are not represented as being manufactured, sponsored, or endorsed by the original tub manufacturer.