The 70°C in the headline cannot be used as a general magnet limit without a verified model datasheet. Check the door-holder option by exact model code.
Find the technical limit. Confirm the magnet maker's permitted operating temperature and whether it refers to the magnet, surface or ambient air. If undocumented, do not assign a threshold.
Separate possible causes in the field
If holding weakens, inspect contact surface, alignment, contamination, installation and damage. Record ambient and surface readings, time, and sun/shade conditions.
Work safely during loading
Stop loading if the door closes unexpectedly; use a mechanical restraint only if instructions permit it. Do not repair the magnet by squeezing or impact.
Verify before reuse
Ask your supplier for an assessment. After replacement or installation, check and record holding function according to instructions.

