What's going on

Wireless charging relies on inductive coupling. Inside your wireless pad is a transmitter coil of copper wire, and inside your phone—just beneath the rear glass—is a matching receiver coil. When electricity passes through the pad's coil, it creates an alternating electromagnetic field. The coil in your phone absorbs this field and converts it back into electrical current to charge the battery.

When this process fails, it is usually because the electromagnetic field is interrupted, the wall adapter cannot supply enough juice to energize the pad, or the phone's operating system has halted charging due to heat or software flags. Less frequently, the internal receiver coil inside the phone has suffered physical damage or become disconnected.

Symptoms people notice

• The charging pad's status light blinks rapidly in red, blue, or yellow, indicating an error.
• The phone detects the charger for 2–5 seconds, vibrates, and then drops the connection.
• The phone feels uncomfortably hot to the touch while sitting on the pad, yet the battery level doesn't rise.
• Wireless charging works intermittently depending on slight movements of the phone.
• Wired charging with a cable works perfectly, but inductive charging fails across all wireless pads.

Likely causes

• Case interference: Cases thicker than 4mm, or those with metal kickstands, magnetic plates, or wallet slots, block induction.
• Insufficient power brick: The adapter plugged into the wall pad doesn't supply enough wattage for wireless transmission.
• Coil misalignment: The phone's internal coil isn't centered over the pad's transmitter coil.
• Foreign Object Detection (FOD): Small metal objects or debris between the phone and pad trigger an automatic safety shutdown.
• Thermal limits: The phone's safety software has suspended wireless charging to prevent overheating.
• Internal coil hardware failure: A dropped phone can break the delicate flex cable connecting the Qi receiver coil to the main board.

Quick checks first

Start by isolating the setup. Take your phone completely out of its case and clear away any stickers or attachments on the back glass. Place the device flat on the center of the pad.

Next, inspect the power brick powering your wireless pad. If it is plugged into a computer USB port or an old 5W wall plug, swap it for a modern USB-C Power Delivery block rated for 20W or higher. Check for any metal objects near the pad, such as paperclips or keys, which activate safety cutoffs. If you suspect software glitches, consult our general troubleshooting guide for soft reset procedures.

When it's a real repair

If your bare phone refuses to charge across multiple verified wireless pads, but wired charging works fine, you are likely dealing with an internal hardware failure. The receiver coil sits right underneath the back glass. Physical drops can shatter the rear glass and tear the copper coil beneath it, or loosen the press-fit connector that links the coil assembly to the logic board.

In some smartphones, the wireless charging coil also houses the NFC antenna or ambient temperature sensors. If these functions are also failing, it confirms physical damage to the internal coil module.

DIY vs professional repair

Replacing a wireless charging receiver coil involves heating and removing the phone's rear glass panel. On modern sealed devices, this requires a heat gun or suction plate, guitar picks to slice through tough waterproof adhesive, and precise handling around internal ribbon cables.

• DIY Feasibility: Moderate difficulty. If you have experience opening phones and replacing back glass, swapping out a wireless charging flex pad is fairly straightforward once inside. You can review detailed tear-down walkthroughs in our repair guides.
• When to seek help: If your phone's back glass is intact and you don't want to risk breaking waterproof seals or damaging the wireless display, having a qualified technician inspect the logic board and internal connectors is the safest route.

Next steps

First, rule out external causes by testing a naked phone on a high-power Qi pad. If hardware damage is confirmed, head over to our DIY guides to see the teardown process for your specific phone model to determine if you have the tools to perform a back-glass coil replacement. For extra community feedback on specific phone models, check out our community forums or browse verified repair experiences in reviews.