HMS_0700_0100
Bambu Lab 3D Printer
Severity:What Does This Error Mean?
HMS_0700_0100 on a Bambu Lab printer means the heatbed temperature sensor is reading abnormally — the bed is not heating, heating too fast, or the sensor has disconnected. The print stops immediately. Power off and inspect the bed wiring.
Affected Models
- Bambu Lab X1 Carbon
- Bambu Lab X1
- Bambu Lab P1S
- Bambu Lab P1P
- Bambu Lab A1
Common Causes
- Heatbed thermistor (sensor) wiring loose or disconnected
- Heatbed cartridge heater failed
- Mains supply voltage too low to heat the bed quickly enough
- Thermistor itself failed (shorted or open circuit)
How to Fix It
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Power off the printer at the switch.
Turn the printer off and unplug from the mains. Leave for 5 minutes to ensure complete shutdown of any thermal protection latches.
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Inspect the heatbed cable.
Look at the cable that runs from the back of the heatbed to the controller. Check for visible kinks, burned spots, or a loose connector. Pinched cables in the rear cable management are a common cause.
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Restart and try a low-temperature print.
Power on, attempt a print at a low bed temperature (50°C for PLA). If the bed fails to heat at all, the heater cartridge has failed. If the bed heats but the error persists, the thermistor is the issue.
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Check ambient temperature.
Bambu Lab printers struggle to heat the bed in cold environments (below 10°C / 50°F). Move the printer indoors and retry — printing in a cold garage can trigger HMS_0700_0100 even with healthy hardware.
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Contact Bambu Lab support if needed.
Persistent HMS_0700_0100 with healthy wiring and normal ambient temperature requires a heatbed assembly replacement. Bambu Lab supports warranty replacements via their support portal.
When to Call a Professional
If the thermistor or heater wiring is damaged inside the heatbed assembly, contact Bambu Lab support — opening the bed assembly without an antistatic setup can damage the controller.
Frequently Asked Questions
Can I keep printing with HMS_0700_0100?
No — the printer halts to prevent fire risk. Heatbed temperature errors are a safety lockout. Continuing to print without resolving the underlying cause is not possible until the bed reads correctly.
How long should the Bambu Lab heatbed take to heat?
From 25°C to 60°C: roughly 60–90 seconds. From 25°C to 100°C: roughly 3–4 minutes. Significantly longer times indicate a power supply issue or a partially failed heater cartridge.