How to Clean and Sanitize a Used Refrigerator Before Use

A second hand refrigerator can look spotless and still carry the previous owner’s spills, odours, and bacteria in its seams and drawers. Properly cleaning and sanitizing a pre-owned unit before loading groceries turns a secondhand purchase into an appliance you can trust. Whether you recently bought one or are currently browsing used fridges for sale, save this step-by-step cleaning guide.

This guide covers the necessary supplies, a safe step-by-step cleaning procedure, odour removal techniques, and the critical cool-down period before plugging it in.

Why a used fridge needs cleaning first

Refrigerators trap moisture, food particles, and warmth when powered off, creating ideal conditions for bacteria and mould. Even when shopping for top-rated used fridges for sale that look clean on the surface, residue often hides inside door gaskets, beneath crisper drawers, and within drainage channels.

Additionally, dried spills and dust on door seals prevent drawers from sliding smoothly and stop doors from sealing tightly. Thoroughly sanitizing the unit protects food safety while helping the compressor operate efficiently.

What you will need

Gentle cleaning solutions are safest for refrigerator interiors, as harsh chemicals can leave toxic residues on food-contact surfaces. Use the recommended items below:

Task	Recommended product	Avoid product
General wash	Warm water with mild dish soap	Abrasive scouring powders
Sanitizing	1 tsp bleach per litre of water, OR white vinegar	Bleach mixed with other chemicals
Odour removal	Baking soda paste or an open baking soda box	Strong scented air freshener sprays
Gaskets & seams	Soft toothbrush and warm soapy water	Knives or sharp scrapers
Drying	Clean microfibre cloths	Air drying while damp

How to clean and sanitize a used refrigerator

Ensure the refrigerator is unplugged and empty before cleaning. Work from top to bottom so drips fall onto uncleaned lower surfaces:

1. Remove all detachable parts: Take out all shelves, crisper drawers, and door bins to clean them separately.
2. Wash removable components: Allow glass shelves to adjust to room temperature before washing to prevent cracking. Wash with warm, soapy water, rinse, and set aside to dry.
3. Clean the interior: Wipe the ceiling, walls, and floor using warm water and mild dish soap. Use a soft toothbrush to remove debris from corner seams and door gaskets.
4. Sanitize surfaces: Wipe down all interior surfaces using a mixture of 1 teaspoon of bleach per litre of water, or full-strength white vinegar. Follow up with a final wipe using clean water.
5. Clear the drain hole: Inspect the small drip drain at the back of the compartment and clear any blockages to ensure condensation drains properly.
6. Dry completely: Thoroughly dry every surface with a clean microfiber cloth to eliminate moisture that encourages mould growth.
7. Reinstall components: Reinsert the dried shelves and bins once the interior is completely dry.

For more guidance on food safety standards, refer to the Canadian Food Inspection Agency consumer food safety guidelines.

Beating odours and preventing mould

Food smells can absorb into plastic liners over time. Rather than covering smells with perfumed sprays, absorb them directly using these methods:

• Baking soda paste: Scrub stubborn stains using a paste made of baking soda and water, then leave an open container of baking soda inside to absorb lingering odours.
• Activated charcoal or coffee grounds: Place a small bowl of dry coffee grounds or activated charcoal inside for 24–48 hours to neutralize persistent smells.
• Air circulation: If the unit has been sealed shut for a long period, leave the doors open in a well-ventilated room for several hours prior to sanitizing.
• Gasket maintenance: Clean inside the flexible folds of the rubber door gaskets using a soft brush and mild soap to remove hidden mildew.

Before you plug it in and load food

Before plugging in newly acquired used fridges for sale, complete these operational steps to prevent component damage:

First, if the refrigerator was transported horizontally or on an incline, follow the model’s installation manual. Depending on the refrigerator and how it was transported, the required upright waiting period may be as long as 24 hours (for reference, see Whirlpool’s refrigerator setup guide).

Second, allow the unit to run empty until it stabilizes at safe operational temperatures: 4°C (39°F) or lower for the fresh food compartment, and -18°C (0°F) for the freezer. Verify temperatures with an appliance thermometer before storing food.

Frequently Asked Questions

Max Appliances offers inspected, quality pre-owned and open-box appliances. View available used fridges for sale with delivery options across North York, Vaughan, Markham, Etobicoke, and the GTA. Contact our team for assistance.