We maintain door seals to our freezers and we have posted the freezer maintenance policy.
Unmaintained, loose, or leaky door seals allow cold air to escape from the freezer, causing the freezer compressor to have to work harder than it should. Door seals should be regularly checked (e.g. for excess ice) to ensure that the freezer runs efficiently. For more information, please click here.
General maintenance procedures for freezers should be posted. For example, procedures involving how often the freezer should be defrosted and inventorying the freezer should be visible to all lab members. The link here gives a good example of what kinds of preventative maintenance should be done on freezers.