Structural / Functional Issue

How to Fix Part Deforms in Heat / Sun

Step-by-step fix for part deforms in heat / sun on Bambu Lab printers including X1C, H2D, P1S, and A1.

How do I fix part deforms in heat / sun?

1
Switch from PLA to ABS, ASA, or PC. PLA softens at ~55°C — a car dashboard can reach 80°C+. ABS (100°C), ASA (95°C), and PC (130°C) handle heat far better.
2
If PLA is required, use PLA-CF which has a slightly higher HDT (~60°C). But for real heat resistance, engineering materials are the only reliable option.
3
For outdoor parts, use ASA specifically — it combines UV resistance with ~95°C HDT, making it the best all-around outdoor material.

Pro tip: Select "High Temp (60°C+)" above — it filters materials by heat deflection temperature and adjusts bed/enclosure settings for heat-resistant filaments.

Related Print Issues

Weak Layer Adhesion / Delamination Part Breaking Along Layer Lines Poor Dimensional Accuracy Part Too Flexible / Not Stiff Enough Bed Adhesion Failure / Part Detaching

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Uneven First Layer Stringing / Oozing Visible Layer Lines Elephant Foot (First Layer Bulge)Warping / Curling / Lifting Visible Z-Seam Rough / Droopy Overhangs Blobs / Zits on Surface Ghosting / Ringing Weak Layer Adhesion / Delamination Part Breaking Along Layer Lines Poor Dimensional Accuracy Part Too Flexible / Not Stiff Enough Bed Adhesion Failure / Part Detaching Support Removal Damage / Scars Infill Showing Through Walls Heat Creep / Clogging Mid-Print Thin Walls Breaking / Gaps in Thin Features Spaghetti / Print Detached Mid-Print Under-Extrusion (Sparse Lines / Missing Material)Over-Extrusion (Blobby / Too Much Material)Nozzle Clog (Blocked / No Extrusion)Extruder Clog (Filament Stuck in Gears)Filament Sticking to Nozzle (PETG)Bad Bridging Quality (Sag or Snap)Belt Pattern / VFA (Vertical Fine Artifacts)Gaps / Holes in Top Layer Different Gloss / Sheen on Different Areas Interlayer Cracking (ABS/ASA/PC/PA)Model Collapsing / Nozzle Hitting Print Wet / Damp Filament (Popping, Bubbles)Layer Shifting (Layers Offset Mid-Print)AMS Filament Tangled / Spool Stuck AMS Filament Ran Out Mid-Print AMS Cutter Stuck / Failed to Cut Filament Pile-Up in Waste Chute Build Plate Not Detected / Marker Missing Power Loss / Print Resume After Outage Hotend Fan Speed Abnormal / Stopped Homing Failed (X/Y/Z Axis)AMS Filament Change Failed / Purge Timeout Chamber Temperature Too High (PLA/PETG Softening)Print Paused — Door / Cover Open Printing CF Material with Wrong Nozzle CR Touch / BLTouch Leveling Failure Sprite Extruder Clicking / Grinding Filament X/Y Belt Tension Issues (Loose or Over-tight)Klipper Input Shaper / Pressure Advance Tuning Thermal Runaway Protection Triggered Bed Leveling Springs Losing Tension Creality Print / Slicer Compatibility Issues PTFE / Bowden Tube Wear or Gap IDEX Dual Extruder Calibration Offset Luban Connection / WiFi Transfer Issues Module Switching Problems (3D Print / CNC / Laser)Heated Bed Temperature Uniformity (Large Bed)