Whirlpool bath button not working

Question

Whirlpool bath button making humming noise when pressed and slow to come up when pressed, is it the air hose switch that needs replacing?

Andi · Answer

Hi yes it's the air hose switch that needs replacing

Benjamin · Answer

If the whirlpool bath button hums when pressed AND is slow to spring back up, the air hose or the pneumatic switch is failing.  
That humming is the pump receiving a weak or partial signal because the air pressure isn’t being delivered cleanly.
What’s actually happening-
The push button sends an air pulse down a small hose to the air switch on the pump.

If the hose is blocked, split, kinked, full of moisture, or the button diaphragm is worn, the pressure pulse becomes weak.

The pump tries to activate - humming noise.
The button feels sluggish -diaphragm sticking or hose restriction.
This is not an electrical fault. It’s the classic symptom of a failing pneumatic control.

What to check -
Pull the button out and inspect the air hose for: splits, loose fit, moisture inside kinks.

Blow through the hose — if it’s restricted, you’ll feel it.
Check the button diaphragm for stiffness or cracking.
Check the air switch on the pump — sometimes they stick internally.

Most common fix
Replace the air button + hose as a pair.  
Cost is low, install is quick, and it eliminates 95% of these issues.
If the hose and button are good, then replace the air switch on the pump.

1. Replacement Air Button (the part you press)
This is the part that’s sticking and causing the weak air pulse.
Balboa Chrome Air Button
Standard size (33–35mm)
Fits 3–4mm air hose

Ideal universal replacement for whirlpool baths

2. Replacement Pneumatic Air Switch (mounted on the pump)
If the button is failing, the switch is often worn too — especially if you’re getting humming.
Tecmark TBS106 Air Switch – 16A, 2 PSI
Industry standard
Latching type
Compatible with most UK whirlpool pumps

3. Optional: New Air Hose
If the hose is kink , split, or full of moisture, replace it.
Universal Pneumatic Air Hose + Button (White)
Cheap replacement
Works with standard air switches

Lake · Answer

It sounds like you’re dealing with a classic case of a tired Pneumatic (Air) Switch system. In a whirlpool bath, the button you press doesn't actually have electricity behind it—it’s just a bellows that sends a puff of air down a thin plastic tube to a switch on the pump.Here is why it's acting up and what you’re likely looking at:1. The Symptoms vs. The CauseThe "Slow to come up" part: This is almost certainly the Button/Bellows unit itself. Over time, the rubber bellows inside the button perishes or gets "gunked up" with soap scum and limescale. If it can't spring back, it won't be ready to send the next air pulse.The "Humming noise": This is the more concerning part.Scenario A: If the pump is humming but not moving water, the motor is jammed or the start capacitor has failed.Scenario B: If the button or switch is humming, it usually means the air pulse was too weak to fully "flip" the electrical switch on the pump, leaving it stuck in a vibrating halfway-house.2. Is it the Air Hose or the Switch?It is rarely the actual hose unless it has a visible hole or has popped off the connector. The culprit is usually one of these two:The Air Button (The part you touch): If it feels "mushy" or slow, replace this first. They are cheap and easy to swap from above the bath.The Pneumatic Switch (The part on the pump): This is the electrical component. If the button is sending air but the pump only hums or refuses to click "On/Off," the internal diaphragm in this switch has likely failed.3. Estimated Costs for RepairIf you're handy, this is a very DIY-friendly job. If you call a pro, here is the breakdown:Part / TaskDIY Cost (Parts)Professional Cost (Inc. Labor)New Air Button/Bellows£10 – £20£60 – £90Pneumatic Switch£15 – £30£80 – £120Replacement Pump£150 – £300£250 – £4504. Safety WarningDo not poke anything metal into the button or switch area. While the button is safe (just air), the other end of that tube connects directly to the 240V electrical supply for the pump.What to try first:Check the tube: Ensure the thin clear pipe hasn't kinked or filled with water. If there's water in the tube, the air pulse won't work.The "Blow

Zach · Answer

It’ll most probably be a diaphragm washer. Either in the syphon bellow or in the ball valve itself. I’d suspect its coming from the ball valve

Whirlpool bath button not working

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