Prusa Error 13202: Preheat Error on the Print Head
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Prusa error 13202 is a preheat failure on the print head, not on the bed. The hotend did not reach its target within the allowed time, so the firmware stopped. Prusa’s own guidance is to check the print head heater and thermistor wiring — on a Nextruder that cable flexes on every layer, which is exactly where it fails.
People routinely confuse this with 13201. The difference is one digit and a completely different component: 13201 is the heatbed, 13202 is the hotend. Checking the wrong one wastes an afternoon.
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Why the print head is different from the bed
The bed sits still. The print head moves, and its cable bundle bends thousands of times per print. That makes intermittent breaks far more likely at the head than at the bed, and it is why a fault that appears only after the printer has been running for a while usually points here.
Check in this order
- Heater connector at the head. Power down, unplug, inspect for browning, reseat firmly.
- Thermistor and its lead. Flex the cable gently along its length while watching the temperature readout. A jumping or dropping reading finds the break for you.
- Part cooling fan aim. A duct knocked out of position can blow directly onto the heater block and stop it reaching target.
- Silicone sock. Missing or torn, the block loses heat fast enough to miss the timeout on a cold start. Cheap to replace and worth doing anyway.
- Heater cartridge. Measure it. Open circuit means replacement.
If the hotend heats but slowly
Reaching temperature eventually, but too slowly, usually means a heater that is degrading rather than one that has failed, or a sock that has fallen off. For what a hotend upgrade does and does not fix, see hotend upgrades.
The neighbouring codes
13201 is the heatbed version of this error. 13204 is thermal runaway, which means the hotend did reach temperature and then the reading diverged — a more serious fault. 13211 is the separate heatbreak sensor, which catches people out because the hotend itself looks fine.
On other models the same error reads 12202 (MINI), 31202 (CORE One), 35202 (CORE One L) or 23202 (MK3.5).
Prusa Error 13202 FAQ
What is the difference between 13201 and 13202?
13201 is the heatbed failing to preheat; 13202 is the print head. Same category of fault, different heater and different sensor.
Why does 13202 only appear sometimes?
An intermittent fault points at the cable rather than the heater. The print head loom flexes every layer, so a partial break shows up only in certain positions.
Can a missing silicone sock cause 13202?
It can contribute, particularly on a cold start in a cool room. It is not usually the only cause, but it is the cheapest thing to put right.
Is it safe to keep printing?
No, and the printer will not let you. The check exists because an unverified heater is a fire risk.
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