Most PS5s that arrive at our bench with a thermal complaint are not broken. They are dirty. The fan is fine, the APU is fine, the liquid metal under the heatsink is — usually — fine. What's wrong is that the intake side has been quietly hoarding two years of apartment dust, and the fan is now working twice as hard to push half the air through it. This is the most common single fault we see on the platform, and it is also the easiest one to prevent.
What builds up inside
The PS5 pulls air through a row of slim slots on one side and exhausts it out the back. Those intake slots are the dust filter. There is no other filter. Anything in the room — fabric fibres from the sofa it sits next to, pet hair, kitchen grease, cigarette particulate, gypsum dust from a recent renovation — gets vacuumed straight into the heatsink fins and the fan blades.
On a console that has lived in a clean office for two years, the intake side looks dusty but the fins behind it are mostly clear. On a console that has lived next to a sofa with a long-haired cat, the fins are a felt mat after eighteen months. We have pulled out compacted dust pads thick enough to stand on their own when removed from the fan shroud.
- —Heatsink fins — the densest packing point; airflow drops first here
- —Fan blade leading edges — dust changes the blade profile and unbalances the rotor
- —Fan bearing — fine particles work past the seal and accelerate bearing wear
- —Foam dam around the APU — saturates with dust, loses its ability to contain the liquid metal
- —Optical drive rails and laser lens (disc model) — read errors and grinding noises start here
- —PSU intake — secondary fault path, slower to develop but harder to fix
Apartments here run hot dry air through radiators for six months of the year, then open every window for the other six. Both phases are bad for consoles — the heating season suspends fine particulate that settles into intakes, and open-window season delivers pollen plus construction dust. A PS5 in central Helsinki collects roughly twice the dust load per year of one in a climate-controlled office in the same city.
What actually goes wrong
The failure cascade is always the same shape. Dust restricts airflow, the APU runs hotter, the fan ramps to compensate, the fan now runs at higher RPM continuously, bearing life shortens, and warm components age faster. Below is what we logged across 187 PS5 services in 2025 — only consoles that arrived with a thermal or noise complaint, no warranty repairs, no liquid spills.
| Symptom on arrival | Share of cases | Root cause |
|---|---|---|
| Loud fan, no shutdowns yet | 54% | Dust + aged paste |
| CE-108255-1 thermal shutdown | 18% | Dust choking intake fully |
| Slow fan ramp, then crash | 9% | Failing fan bearing (dust-accelerated) |
| Liquid metal migration | 8% | Dust-saturated foam dam |
| Disc drive grinding / read fail | 6% | Dust in optical assembly |
| PSU shutdown under load | 3% | Dust in PSU intake mesh |
| Other | 2% | Mixed |
Eighty-one percent of those failures trace back, directly or indirectly, to dust. The CE-108255-1 cases are the dramatic ones — the console reads 95 °C+ at the APU sensor and hard-shuts to protect itself — but the loud-fan cases are the more interesting category, because the customer has been living with a console that is slowly damaging itself for months before they finally bring it in.
The liquid metal problem nobody talks about
Sony shipped the PS5 with liquid metal as the thermal interface between the APU and the heatsink. It is held in place by a thin foam dam. That dam is not waterproof and it is not dust-proof — it is a mechanical barrier with a finite lifespan. When dust saturates the foam, capillary action changes, and the liquid metal can wick into the dam and migrate off the die. We see this most often on PS5s that ran hot for a long stretch and were then cleaned by an unprofessional service that didn't replace the dam. The console comes back to us six months later with a hotspot the new paste cannot fix.
“Dust does not kill a PS5 in a week. It kills it in eighteen months — and the customer thinks the console just got old.”— Andrei, on the bench
What sustained heat does to the rest of the board
The APU is not the only component that minds the temperature. GDDR6 modules, the SSD controller, and the VRM stages all sit close enough to the hot side of the heatsink that ambient case temperature matters. We have measured GDDR temperatures crossing 90 °C on neglected consoles during long sessions, which is inside spec but well above the 60–70 °C those modules sit at on a clean unit. Memory does not fail dramatically from this — it fails slowly, with the kind of intermittent artifacts that get blamed on a game's bad patch.
How often is enough
There is no universal answer because there is no universal apartment. The variables that matter, in rough order of impact: pets, smokers, carpet, room size, hours of use, console placement (closed shelf versus open desk), and renovation activity in the building. A PS5 sealed in a closed cabinet next to a long-haired dog is a very different machine from a PS5 on an open desk in a non-smoking studio.
| Environment | Recommended interval | What we see |
|---|---|---|
| Clean apartment, no pets, open shelf, 1–2 hr/day | Every 24 months | Light dust, no thermal symptoms |
| Average apartment, 3–4 hr/day, occasional vacuuming | Every 12–18 months | Moderate dust, fan starting to ramp |
| Pet in the home, carpet, 4+ hr/day | Every 9–12 months | Heavy fur mats in intake |
| Smoker household | Every 6–9 months | Tar binds dust into a paste |
| Recent renovation in building | Once during, once after | Gypsum dust is the worst case we see |
If the fan is audibly louder than it was a year ago — even slightly — the console is already past the comfortable cleaning window. The fan curve is reactive, not predictive. By the time you can hear it, the APU has been running a few degrees hotter for weeks.
What a proper clean looks like
A surface clean — a can of compressed air through the intake slots — buys you a few months and is genuinely worth doing between full services. It will not fix a console that has already passed the threshold where the fins are matted. A proper clean means the console comes apart.
- —Remove side covers, shield plate, and fan assembly
- —Vacuum the heatsink fins from the exhaust side with a soft brush attachment — never blow inward
- —Clean the fan blades and shroud with isopropyl 99% on a lint-free cloth
- —Inspect the foam dam under the APU for compression and dust ingress
- —If the dam is compromised, replace it and the liquid metal together — never one without the other
- —Reapply liquid metal in a controlled bead, or switch to a pump-out resistant paste if the dam is borderline
- —Reseat the heatsink with the original screw torque pattern
- —Test under load for thirty minutes minimum, log APU and exhaust temperatures
Total time on the bench: about ninety minutes for a straightforward clean, two hours if the dam needs replacing, three if liquid metal has already migrated and we are recovering from a previous bad service. The price difference between those three jobs is significant — and the difference between the first and the third is, in nearly every case, whether the console came in for a clean a year earlier.
Don't open a PS5 yourself unless you have done it before and have the right T8 and T10 security drivers, a clean workspace, and replacement foam dams on hand. The intake-slot dust looks cosmetic and it is not — the fan shroud and the dam underneath are the parts that matter, and getting to them without breaking a clip or smearing the liquid metal is the part that takes practice.
FAQ
Will opening the PS5 void my warranty?+
Yes — Sony's warranty ends the moment the void sticker is broken. Inside the standard one-year warranty, send the console to Sony for a free clean. Outside warranty, the sticker has no legal force in Finland and a professional service is the cheaper option.
Is the official Sony cleaning kit enough?+
It clears the intake slots, which is useful as a stop-gap. It does not reach the heatsink fins, the fan bearing, or the foam dam — which are the parts that actually fail. Treat it as light maintenance between proper cleans, not a substitute.
My PS5 is silent and cool — do I still need a yearly clean?+
If the console is under two years old, lives in a clean dry room with no pets and no carpet, and is silent under a long session, you can stretch to twenty-four months. Past that, even silent consoles benefit — dust accumulates regardless of whether the fan has noticed yet.
How much does a clean cost compared to a thermal repair?+
A preventive clean is roughly a third of the cost of a recovery service after liquid metal migration, and roughly a tenth of the cost of replacing a fan that died from dust-accelerated bearing wear. The maths is not subtle — yearly cleaning is the cheapest line item in the lifetime cost of owning a PS5.
Certified laptop and console repair master. Twenty years on the bench in Helsinki — tearing down PS5s, MacBooks, and gaming PCs and writing down what we learn.
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