Then you need an announcement
Then you give warning of when it will happen
Plan a contingency fridge
On said date switch fridge off for 24 hrs
Bring in a suitable consultant, to advise how to defrost the fridge.
Get H&S and Occy Health to write a detailed risk assessment.
Form a short span working group to write some Standard Operating Procedures for how to defrost the fridge.
Put the whole event through a value engineering process.
Decide that this is beyond the remit of all staff, and that three members of staff should go for fridge defrosting training.
Eventually, sub-contract out the technical work to a specialist company who drive the length of the UK, stay overnight and work in three’s ‘for health and safety reasons’ at all times.
The contractor advises it is an old model fridge, and this needs replacing.
Someone calls the council to upload the old fridge, who refuse and direct the company to a recycling organisation, who require permission to be on site.
A new fridge is bought and installed by a specialist catering company, who charge had a squillion pounds for a cheap Bendix fridge.
FTFY.