How to Fix Samsung Galaxy A5 Overheating From Water or Liquid Damage (2026 Guide)

The Samsung Galaxy A5 (2017) carries an IP68 water resistance rating, which means it can survive submersion in 1.5 meters of fresh water for up to 30 minutes. That said, IP68 does not make the phone waterproof. Salt water, soapy water, pool chemicals, and even prolonged fresh water exposure can still cause internal corrosion that leads to overheating, short circuits, and eventual component failure. If your Galaxy A5 started overheating after contact with liquid, this guide walks you through every diagnostic and fix option — from checking the Liquid Damage Indicator to deciding whether a repair or replacement makes more financial sense in 2026.

Samsung Galaxy A5 (2017) Key Specifications

Spec	Detail
Display	5.2-inch Super AMOLED, 1920 × 1080 (Full HD), 424 ppi
Processor	Samsung Exynos 7880, Octa-core 1.9 GHz Cortex-A53
RAM	3 GB
Storage	32 GB (expandable via microSD up to 256 GB)
Battery	3,000 mAh (non-removable)
Water Resistance	IP68 (1.5m / 30 minutes, fresh water only)
Original OS	Android 6.0.1 Marshmallow
Final OS	Android 8.0 Oreo (some regions received Android 9 Pie)
Security Updates	Ended early 2021
SIM	Nano-SIM + microSD (hybrid slot)

Important: The Galaxy A5 (2017) has not received software or security updates since early 2021. This means any software-related overheating fixes (firmware patches, thermal management improvements) are no longer available from Samsung. All troubleshooting in this guide focuses on hardware diagnosis and hands-on fixes.

Why Liquid Damage Causes Overheating

Before jumping into fixes, it helps to understand what liquid actually does inside a phone. Water alone is a poor conductor, but the minerals, salts, and chemicals dissolved in it create conductive paths between components that were never designed to be connected. Here is what happens:

Micro short circuits form when mineral deposits from evaporated water bridge tiny gaps between solder points on the motherboard. These shorts force current through unintended paths, generating heat.

Corrosion develops when moisture reacts with metal contacts and traces on the logic board. Corroded connections increase electrical resistance, which converts energy into heat instead of useful work. This process accelerates over days and weeks — a phone that seems fine immediately after water contact may start overheating days later.

Battery cell damage occurs when liquid reaches the battery’s internal chemistry through micro-cracks in the protective casing. A compromised lithium-ion cell can overheat, swell, and in extreme cases become a fire risk. If your Galaxy A5’s back panel appears to bulge outward, stop using the phone immediately.

Step 1: Check the Liquid Damage Indicator (LDI)

Samsung places a small Liquid Damage Indicator sticker inside every Galaxy device. On the Galaxy A5 (2017), it is located inside the SIM card / microSD tray slot. Here is how to check it:

Power off your Galaxy A5 completely.
Insert the SIM ejector tool (or a straightened paperclip) into the small hole on the top edge of the phone to pop out the SIM/microSD tray.
Remove the tray and set it aside.
Shine a flashlight into the empty slot. You will see a small rectangular sticker on one of the interior walls.
Check the color:
- Solid white or white with pink/purple X marks — No liquid damage detected. The overheating is likely caused by something else (skip ahead to Step 3).
- Solid pink, purple, or red — Liquid damage confirmed. Continue to Step 2.

Note: The LDI only confirms that liquid reached the SIM tray area. Liquid can enter through the USB-C port, speaker grille, or headphone jack without tripping the LDI. A white indicator does not guarantee the phone is damage-free — it only means water did not reach that specific location.

Step 2: Dry the Phone Properly (If Recent Exposure)

If the liquid exposure happened recently (within the last 24-48 hours), proper drying can prevent further damage:

Power off the phone immediately. Leaving a wet phone powered on dramatically increases the risk of short circuits and permanent component damage.
Remove the SIM tray to open an additional air channel into the device.
Shake the phone gently with the USB-C port facing down to dislodge any standing water in the ports.
Wipe the exterior with a lint-free cloth. Pay attention to the USB-C port, headphone jack, speaker grille, and SIM tray slot.
Place the phone in a well-ventilated area with airflow (near a fan, not a heater) for at least 48 hours. A shallow container with silica gel packets will help absorb residual moisture if you have them available.

What NOT to do:

Do not use a hair dryer or heat gun. The Galaxy A5’s Super AMOLED display and adhesive seals can warp at temperatures above 50°C, making the problem worse.
Do not put the phone in rice. Despite the popular myth, rice does not effectively absorb internal moisture and can leave starch particles lodged in ports. Silica gel packets or simply air drying with a fan are both more effective.
Do not use compressed air. High-pressure air can drive moisture deeper into the device, pushing liquid into areas it had not yet reached.
Do not charge the phone until it is completely dry. Applying voltage to wet circuits accelerates corrosion and can cause immediate short circuits.

Step 3: Inspect the USB-C Port

The USB-C port is the most common entry point for moisture on the Galaxy A5 (2017). Even a small amount of liquid in the port can cause the phone to detect moisture and prevent charging, or worse, create a short circuit that generates heat.

Look inside the USB-C port with a flashlight. Check for visible corrosion (green or white crusty deposits), lint, or debris.
If you see corrosion, gently clean the port with a wooden or plastic toothpick. Do not use metal tools — they can short-circuit the charging pins.
Lightly dampen a cotton swab with 90%+ isopropyl alcohol and carefully clean inside the port. The alcohol displaces water and evaporates quickly without leaving residue.
Let the port air dry for at least 30 minutes before attempting to charge.

If the phone was showing a “moisture detected” warning before the overheating started, cleaning the USB-C port often resolves both issues simultaneously.

Step 4: Boot Into Safe Mode

If the LDI shows no liquid damage (or after you have dried and cleaned the phone), the overheating may be caused by a misbehaving app rather than hardware damage. Safe mode disables all third-party apps, letting you isolate the cause:

Press and hold the Power button until the power menu appears.
Touch and hold the Power off option on screen until the “Safe mode” prompt appears.
Tap Safe mode to confirm.
The phone will restart with “Safe mode” displayed in the bottom-left corner.

Use the phone normally for 15-30 minutes in Safe mode. Pay attention to whether it still overheats.

Phone stays cool in Safe mode: A third-party app is causing the overheating. Start by uninstalling any apps you installed shortly before the problem began. Common culprits include battery optimizer apps (which ironically increase CPU usage), VPN apps that run constant background processes, and social media apps with runaway background sync.
Phone still overheats in Safe mode: The issue is either hardware-related (liquid damage to the motherboard or battery) or a system-level software problem. Continue to Step 5.

To exit Safe mode, simply restart the phone normally.

Step 5: Reset All Settings

This step restores the phone’s system settings to factory defaults without deleting your files, photos, or apps. It fixes overheating caused by corrupt system configurations, malfunctioning sensor calibrations, or incorrect power management settings:

Open Settings.
Tap General management.
Tap Reset.
Tap Reset settings.
If prompted, enter your PIN, password, or pattern.
Tap RESET SETTINGS to confirm.

After the reset, the phone will restart. Monitor the temperature for 30-60 minutes of normal use. If overheating continues, proceed to the factory reset in Step 6.

Step 6: Factory Reset (Last Software Fix)

A factory reset wipes everything and returns the phone to its original state. This is the last software-based troubleshooting step before concluding the problem is hardware-related.

Before resetting, back up the following:

Photos and videos (upload to Google Photos or copy to a computer via USB)
Contacts (sync with your Google account under Settings → Accounts → Google)
Messages (use Samsung Smart Switch or a third-party backup app)
App data and login credentials (note down 2FA app codes — you will lose them)

Important: Remove your Google account from the phone before resetting to avoid Factory Reset Protection (FRP) locking you out. Go to Settings → Accounts → Google → Remove account.

Method 1: Settings Menu Reset

Go to Settings → General management → Reset → Factory data reset.
Scroll down and tap Reset.
Enter your PIN/password if prompted.
Tap Delete all.

Method 2: Recovery Mode Reset (If the Phone Is Too Hot to Navigate Normally)

Power off the phone completely.
Press and hold Volume Up + Home + Power simultaneously.
When the Samsung logo appears, release all buttons. The Android Recovery menu will load (this may take 30-60 seconds — you may see “Installing system update” or “No command” briefly).
Use the Volume Down button to highlight wipe data / factory reset.
Press the Power button to select.
Highlight Yes — delete all user data with Volume Down.
Press Power to confirm.
When complete, Reboot system now will be highlighted. Press Power to restart.

If the phone continues to overheat after a factory reset, the problem is hardware-related. No further software troubleshooting will help.

Step 7: When to Seek Professional Repair vs. Replace

At this point, you have confirmed the overheating is caused by physical damage to the motherboard, battery, or internal components. You have two realistic options:

Professional Repair

A qualified technician can open the Galaxy A5, clean corrosion from the motherboard with isopropyl alcohol and an ultrasonic cleaner, and replace damaged components. Here is what to expect:

Service	Typical Cost	Notes
Motherboard cleaning (corrosion removal)	$50–$80	Success rate varies — severe corrosion may be irreparable
Battery replacement	$40–$60	Always recommended after liquid exposure, even if the battery seems fine
Full liquid damage repair (cleaning + battery + testing)	$80–$120	Includes component-level diagnosis

Samsung official service centers will likely decline repair on a Galaxy A5 (2017) due to the device’s end-of-life status. Third-party repair shops (like uBreakiFix or independent mobile repair shops) are your best option. Call ahead and confirm they handle liquid damage repair on older Samsung models.

Warning: If your phone’s back panel is bulging, the battery is swelling. A swollen lithium-ion battery is a fire and chemical burn hazard. Do not attempt to charge, use, or repair the phone yourself. Take it to a professional or a Samsung service center immediately for safe battery removal and disposal.

When Replacement Makes More Sense

For a phone released in January 2017 that no longer receives security updates, spending $80+ on repair often does not make financial sense. Here is how the Galaxy A5 (2017) compares to current budget Samsung options:

Feature	Galaxy A5 (2017)	Galaxy A16 5G (2025)	Galaxy A26 5G (2025)
Display	5.2″ AMOLED, 1080p	6.7″ AMOLED, 1080p, 90Hz	6.7″ AMOLED, 1080p, 120Hz
Processor	Exynos 7880	MediaTek Dimensity 6300	MediaTek Dimensity 7300
RAM	3 GB	4 GB	8 GB
Battery	3,000 mAh	5,000 mAh	5,000 mAh
Water Resistance	IP68	IP54	IP67
Software Updates	Ended 2021	6 years guaranteed	6 years guaranteed
Price (as of 2026)	N/A (discontinued)	~$150	~$250

The Galaxy A16 5G costs roughly the same as a liquid damage repair on the A5 and gives you a phone with 6 years of software support, a significantly larger battery, 5G connectivity, and modern app compatibility. The Galaxy A26 5G adds a 120Hz display, more RAM, and better water resistance.

If you are currently backing up your Galaxy A5 data for the factory reset anyway, this is the ideal time to migrate to a new device using Samsung Smart Switch.

Quick Troubleshooting Reference

Symptom	Most Likely Cause	Recommended Fix
Overheats only when charging	Corrosion in USB-C port or damaged charging IC	Clean USB-C port (Step 3). If persists, professional repair
Overheats during all use	Motherboard short circuit from liquid damage	Factory reset (Step 6) to rule out software. If persists, professional repair or replace
Overheats + back panel bulging	Swollen battery from liquid intrusion	Stop using immediately. Professional battery removal required
Overheats + “moisture detected” warning	Active moisture in USB-C port	Dry thoroughly (Step 2), clean port (Step 3)
Overheats only with specific apps	App-level issue, not liquid damage	Safe mode test (Step 4), uninstall culprit apps
Overheats after being fine for days/weeks post-exposure	Progressive corrosion spreading on motherboard	Professional ultrasonic cleaning needed — corrosion worsens over time

Safety Warnings

Lithium-ion battery risk: If your Galaxy A5 feels abnormally hot to the touch (too hot to hold comfortably), power it off immediately and place it on a non-flammable surface away from anything that can catch fire. Do not attempt to charge a phone that is actively overheating. Lithium-ion batteries that have been compromised by liquid can experience thermal runaway — a self-accelerating heat reaction that can cause the battery to vent toxic gases, catch fire, or rupture.

Do not attempt to open the Galaxy A5 yourself for liquid damage repair. The phone uses strong adhesive to seal the back panel, and prying it open without proper tools and technique risks cracking the glass back, puncturing the battery, or severing the display flex cable. Motherboard cleaning for liquid damage requires specialized equipment (ultrasonic cleaning baths, flux, micro-soldering tools) that is not available for home repair.

Dispose of damaged batteries properly. If you do replace the phone, do not throw the old Galaxy A5 in household trash. Damaged lithium-ion batteries must be recycled at designated electronics recycling drop-off points (Best Buy, Staples, and many carrier stores accept them for free).