The sealing of the low-temperature test chamber is crucial. If the sealing of the equipment is compromised, air leakage may affect the test results, so timely action is required. Here’s what you can do:

?Leakage due to an improperly sealed door?:

Pry open the unsealed part of the door gasket slightly.
Stuff some cotton into the gap, as cotton’s elasticity ensures a tight fit between the gasket and the chamber body.
After adding cotton, make sure the door closes properly.
?Bent sealing strip?:

Use a straightedge to press the inner side of the bent gasket.
Apply a hair dryer to the bent area while controlling the temperature to avoid overheating, which could soften, bubble, or deform the plastic.
Stop heating once the plastic softens slightly.
After cooling, remove the straightedge—the gasket should now be straightened.
?Gap in the central part of the door gasket due to prolonged low-temperature exposure?:

Use a hair dryer to heat the gap.
Pull out the recessed part of the rubber gasket by hand.
Let it sit for 20 minutes until the gap disappears and the seal is restored.
?Aged or damaged sealing strip?:

Long-term use may cause component aging, requiring professional repair by technicians.
These are the common causes and solutions for leaks in low-temperature test chambers. If your equipment is leaking, follow these troubleshooting steps. Poor sealing can lead to inaccurate test results, so address leaks quickly and precisely. If the issue persists, contact a professional engineer for assistance.