Why Is My iPhone Getting So Hot?

If your iPhone is uncomfortably warm to the touch — especially during charging, gaming, or video streaming — you're not alone. iPhone overheating is one of the most common complaints we hear at Bull City Mobile Repair in Durham, NC. While some warmth is normal during intensive use, excessive heat can signal a serious problem that needs attention.

Common Causes of iPhone Overheating

• Faulty or aging battery — a degraded battery works harder to deliver power, generating more heat. This is the #1 cause we see.
• Background app activity — too many apps running in the background drain CPU and battery simultaneously
• Using a cheap or non-certified charger — non-Apple or uncertified cables can cause excessive charging heat
• Software bugs or rogue processes — a misbehaving app can peg your CPU at 100% and cause rapid heating
• Direct sunlight or hot environments — iPhones are designed to operate between 32°F and 95°F (0–35°C)
• Water damage — corrosion from prior water exposure can cause electrical shorts that generate heat
• Hardware failure — a failing charging IC chip or logic board component can cause dangerous overheating

Apple's Known iPhone Thermal Issues

Apple has acknowledged overheating issues in several iPhone generations. The iPhone 15 series, for example, experienced significant overheating complaints at launch related to software and third-party app optimization. Apple addressed many of these through iOS updates, but hardware-related heat issues — particularly battery degradation — require physical repair.

If your iPhone is overheating and is still under Apple's limited warranty, Apple may replace it. However, if your warranty has expired, a battery replacement at Bull City Mobile Repair is almost always more affordable than a full Apple replacement.

What to Do When Your iPhone Overheats

1. Remove the case — cases trap heat. Remove it immediately when the phone is hot.
2. Move to a cooler location — get out of direct sunlight
3. Stop charging and unplug — charging generates heat; stop if the device is already hot
4. Close all apps — double-tap home or swipe up and close everything
5. Restart the phone — a fresh reboot stops any runaway processes
6. Check battery health — go to Settings ? Battery ? Battery Health & Charging

? Warning: Never put an overheating iPhone in the freezer or submerge it in water. Rapid temperature change causes condensation inside the device, leading to water damage.

When to Bring It to Bull City Mobile Repair

• Your iPhone Battery Health is below 80%
• The phone is hot even during idle use
• It shuts off unexpectedly from heat
• The back glass or screen feels hot to the touch constantly
• You've tried software fixes with no improvement

We'll run a free diagnostic and identify whether a battery replacement, software reset, or deeper hardware repair is needed. Walk in at 4201 University Drive #105, Durham, NC 27707, open Monday–Saturday, 10am–6pm. Call (919) 937-9703.