Can anyone tell me if the following statement is true?
Whilst working on a -20 walk in freezer which had a capillary problem, (Now fixed by exchanging for a tx valve) after consulting the manufacturer he informed me that the cabinet would never reach temperature whilst empty. Obviously id taken the food out whilst it was malfunctioning and stored it in a back up freezer.
He claimed that the return air inside the cabinet would not be enough to bring the coil temperature down. By putting a load on it, ie filling the cabinet space with food the contents would freeze and create less duty for the unit.
How does that work?
Incidentally ive had many empty cabinets down to temperature before in low applications.

Any thoughts appreciated