why is my ghd making a quiet but annoying high-pitched whining noise when it's on? it's not the usual click

Diagnosis

The high-pitched whining sound you are hearing is a phenomenon known as "coil whine." In the ghd Platinum Plus Professional Styler, this occurs within the internal power regulation circuitry. Specifically, the device uses an advanced Intelligent Temperature Control system to maintain a precise, constant heat of 365°F (185°C). To do this, the internal inductors and capacitors vibrate at a high frequency as they switch power on and off rapidly to prevent the plates from overheating or cooling down. This is not a mechanical failure or a sign that the plates are loose; it is an electromagnetic vibration. Because the Platinum Plus uses a more sophisticated power delivery system than older ghd models to ensure "smart" heat distribution, the frequency of this vibration can sometimes fall within the audible range of human hearing. You can confirm this is coil whine if the pitch remains constant regardless of how much pressure you apply to the hair or how wide the plates are open; if it were a mechanical or motor issue, the sound would change based on movement.

How to Fix It

While coil whine is an inherent characteristic of the electronic components, you can often minimize the audible frequency by stabilizing the power input and reducing electronic interference. Follow these steps to isolate and mitigate the noise:

1. Power down the styler completely and unplug it from the wall outlet.
2. Identify a "clean" power source. Avoid plugging the styler into a power strip, extension lead, or a multi-socket adapter shared with other high-draw appliances (like a hairdryer or space heater), as "dirty" power can increase the vibration of the inductors.
3. Plug the device directly into a dedicated wall socket. If you are in a bathroom, try a socket on a different circuit breaker if possible to see if the local electrical noise is contributing to the whine.
4. Turn the device on and allow it to reach the operating temperature. Once the plates hit the 365°F threshold, the power draw stabilizes, and the whine often drops in pitch or becomes less noticeable.
5. Check for any external electromagnetic interference. Ensure the styler is not resting on or near a smartphone, tablet, or wireless charger while powered on, as these can create harmonic interference with the styler's internal circuitry.

If That Didn't Work

If the whining persists and is loud enough to be distracting, consider these alternative solutions:

• Voltage Check: If you are using a travel adapter or a voltage converter, remove it immediately. The ghd Platinum Plus is designed for specific regional voltages. Using a converter can force the internal capacitors to work harder to regulate the current, significantly increasing the volume of the coil whine and potentially damaging the heating element.
• Plate Cleaning: While the noise is electronic, heavy product buildup (silicones, oils, and heat protectants) on the plates can cause the thermostat to "hunt" for the correct temperature more aggressively. Use a soft, damp cloth with a tiny amount of mild detergent to clean the plates while cold. This ensures the thermal sensors read the temperature accurately, reducing the frequency of power spikes.
• Hardware Inspection: Inspect the power cable for any kinks or internal fraying. A partially damaged cable can cause voltage fluctuations that make the internal components whine louder. If the cable feels stiff or shows wear at the swivel joint, the unit may require professional service.
• Warranty Claim: While slight coil whine is considered normal, an excessive "screeching" sound can indicate a failing capacitor. If the noise is audible from across the room, contact the authorized service center for a component replacement, as this may be a manufacturing defect in the power board.

Heads Up

• Never use abrasive scrubbers or chemical solvents like acetone to clean the plates, as this will strip the protective coating and lead to uneven heating.
• Avoid leaving the styler plugged in when not in use; although it has an auto-shutoff feature, keeping the capacitors energized unnecessarily can shorten the lifespan of the internal electronics.
• Always store the styler on a heat-resistant surface and allow it to cool completely before wrapping the cord to avoid stressing the internal wiring.
• If you notice any smell of ozone or burning accompanying the high-pitched noise, unplug the device immediately and stop use, as this indicates a short circuit rather than simple coil whine.