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Refrigerators & Freezers

safety logoNo food in lab refrigerators, freezers or walkins.
No flammable material except in flame proof refridgerators/freezers.
Remove and clean out nasties before thawing outside.


Do not store food in lab refrigerators and freezers
Store food only in refrigerators labeled "FOOD ONLY"
Assume ALL others are full of nasty stuff.
ALL cold rooms are research ONLY.

NOTE: there is a refrigerator near the Electronics shop for TGs. FOOD ONLY
            The one in Agassiz 11 is FOOD ONLY as well.

Do not store ethanol in a refrigerator or freezer not specifically designed for flammable storage.

ANY food in a lab area is just plain STUPID.

Cardboard and cold do not mix.

The paper fibers absorb moisture becoming much weaker (and fall apart when you move it) and attract lots of mold. Mold that can be very hazardous to people.

Refrigerator and Freezer Care: regular maintenance can prevent failure

1) DUST on grates, cooling fins and coils is the #1 killer of fridges and freezers.
    Clean at least once per year (every 6 months is ideal).
    This is especially true in PG with our salt air, humidity and organics (aerosols from seaweeds, etc.).
    Chris has more filter material for -80s if needed.

2) ICE BUILDUP can prevent doors from closing, thus increasing the buildup.
    Ice can prevent cooling vents from working.
    Ice takes up space you could be using for storing materials.
    All of this increases the load on your compressor and reduces its life.

3) CLOSURE of doors and internal compartments is vital to compressor efficiency and life.
    Check all seals at least yearly.

4) Make sure you have not blocked vents with reagents.
    Make sure you have not overloaded your refrigerator or freezer.
    Remove all old and unwanted samples and reagents at least yearly.
    (during chemical inventory time?)

5) Have you left adequate space around the fridge or freezer for the proper cooling of the compressor?

Freezer Defrosting

Chemical freezers are not like household ones.

1) Remove all chemical bottles and look for signs of possible leaking

2) IF positive wipes or evidence of leaking, then you must take care of this before defrosting. 

3) Defrost by using tubs to catch water and towels/sponges to catch drips.


5) This is damaging to almost all types of floors!

6) IF CLEAN you may take a freezer outside to the Loeb courtyard or DeNault Aquaria