The short answer
A walk-in that is climbing has product inside, so do two things at once: protect the product and get the unit looked at. The usual causes are a door that is not sealing, a dirty condenser coil, a frozen evaporator or a failed fan or compressor part.
What you can check yourself
- Keep the door shut as much as you can.
- Move what you can to a unit that is holding temperature.
- Check that the door closes fully and the gasket seals.
- Look at the condenser: is it blocked with dust or grease?
- Note the temperature and how long it has been climbing.
What gets checked first
- Door gasket and closer
- Condenser coil and fan
- Evaporator, defrost and fans
- Compressor and its start components
Repair or replace?
Commonly a repair. The estimate is free.
When to call now
Call now, say that it is a walk-in, and give a number to call back on.
Commercial refrigeration: how we help