Resin prints failing in the cold (garage, basement, winter)
If your prints were fine in summer and started failing once the garage, basement or spare room got cold, temperature is the first suspect. Cold resin gets thicker and less reactive, so it flows back under the plate more slowly and needs more light to cure. The usual results are prints that don't stick to the plate, supports that tear off, layers that separate partway up, and rough or soft detail.
Most likely causes (in order)
- Resin too cold to cure properly: Colder resin is less reactive, so the same exposure time cures it less. Phrozen notes most resins perform best above 24 °C and begin to fail below 20 °C.
- Thick resin doesn't settle between layers: Cold resin is more viscous, so it flows back under the plate slowly. Curing before it settles leads to blooming, weak layers and torn supports.
- Temperature drops during a long print: A printer that starts warm and cools overnight cures the last layers differently from the first, so prints can start well and fail later.
- Cycling heaters: A heater that switches fully on and off can swing the temperature enough to leave visible lines or weak layers.
Settings to change
| Setting | Change | Why |
|---|---|---|
| Room / enclosure temperature | Aim for roughly 24–30 °C (75–86 °F) and keep it steady for the whole print | Phrozen and ELEGOO both recommend warm, stable conditions and warn that failures become likely below about 20 °C. |
| Resin temperature | Warm the bottle before pouring (for example in a warm water bath) and stir it well | Warming restores flow; ELEGOO suggests bringing resin to around 30–40 °C. |
| Exposure | If you can't warm the space, increase bottom and normal exposure modestly and confirm with a calibration print | Phrozen suggests about 20% more exposure between 18 and 24 °C; cold resin needs more energy to cure. |
| Wait before cure / lift | Add rest time before each exposure, increase lift distance and slow lift and retract speeds | Gives thick resin time to flow back and reduces peel stress (ELEGOO cold-weather tips). |
Exact values depend on your printer and resin. Start from the resin maker's recommended settings and change one thing at a time.
Where to change it in your slicer
Setting names and locations for Lychee, CHITUBOX, Anycubic Photon Workshop and UVtools. Where we could not confirm an exact menu location, we list the setting name only. Names can differ slightly between versions.
Quick checklist
- Check the actual temperature next to the printer, not the thermostat in another room
- Warm the room or use an enclosure with a thermostat-controlled heater
- Warm and stir the resin before pouring; don't top up mid-print with cold resin
- Add wait-before-cure time and slow the lift
- Raise exposure modestly and run a calibration print at your winter temperature
- Never point an unregulated space heater straight at the printer, and keep heaters clear of resin and IPA
FAQ
What temperature is too cold for resin printing?
Most resin makers say failures become likely below about 20 °C (68 °F). Phrozen recommends 24–30 °C and advises against printing below 18 °C unless you heat the resin.
Why did my resin prints start failing in winter?
Cold resin is thicker and less reactive. Settings that worked in summer can under-cure in a cold garage, so prints stop sticking or separate partway up.
Is it enough to warm the resin before printing?
It helps, but only if the printer stays warm for the whole print. If the resin cools during a long job, the later layers can still fail. Heating the space or an enclosure is more reliable.
Should I just raise exposure in the cold?
A modest increase can compensate, but warming the resin and room is the better fix. Confirm any exposure change with a calibration print at the temperature you'll actually print at.
Not sure which one you've got?
Upload 1–4 photos of the failed print and PrintCleric ranks the likely causes and tells you exactly which settings to change, with sources.
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Sources
- Phrozen Help Center: What is the Optimal Temperature for 3D Printing?
- ELEGOO Wiki: 3 tips for resin printing in cold weather
- CHITUBOX Academy: All You Need to Know about Failed Printing
- CHITUBOX Docs: Configure Print Settings
- Lychee Documentation: Burn-in / Bottom Layers Calibration
- Anycubic Wiki: Common parameter description
- UVtools (official repository)
Related fixes
- Layer separation / delamination in resin prints
- Failed supports: model stuck to the FEP, only supports printed
- Nothing on the build plate (print stuck to the FEP)
- Suction cups and blowouts (volcanoes) in hollow resin prints
- Elephant's foot (flared bottom layers)
- Blooming and over-exposure: soft details and rough surfaces
Wear nitrile gloves and eye protection when handling uncured resin, and work in a ventilated space.