How to Change a Fridge Bulb: A Simple Step-by-Step

Open the fridge door and instead of that reassuring glow you get nothing but darkness. Annoying, yes, but rarely serious. Most of the time a dead interior light just means the bulb has reached the end of its life, and learning how to change a fridge bulb is one of the easier jobs you can tackle at home with no special tools.

This guide walks you through doing it safely, picking the right replacement and spotting the signs that point to a switch or wiring fault rather than a simple blown bulb.

Is it really the bulb?

Before you start unscrewing anything, it's worth a quick sanity check. A fridge light that won't come on isn't always a dead bulb.

• The fridge is still cold and running. Good. That tells you the appliance has power and the problem is almost certainly the light circuit, not the whole unit.
• The door switch. Your interior light is controlled by a small plunger switch in the door frame. Press it in with your finger while the door is open. If the light was already off, that's expected. The thing to check is whether the switch springs back out smoothly when released. A sticky switch can leave the lamp permanently off (or, more annoyingly, permanently on, which warms the fridge and wastes energy).
• A new bulb still doesn't work. If you fit a known-good bulb and you still get nothing, the fault is more likely the door switch, the wiring or, on newer fridges with LED strips, the light module itself.

If the fridge has stopped cooling altogether, that's a different problem. Worth ruling out simple things first, like checking the temperature is set correctly. Our guide on setting the right fridge freezer temperature covers that.

Safety first: isolate the power

It's a low-voltage job in most fridges, but electricity and your fingers near a fitting are reason enough to switch off properly. Don't rely on the door being open to keep things safe.

1. Switch the fridge off at the wall socket.
2. Pull the plug out, or switch off the relevant circuit at the consumer unit if the socket is hard to reach.
3. Give the appliance a moment, then you're clear to work.

If you'd like a fuller rundown on doing this properly, read how to safely isolate an appliance before a DIY repair.

Find and remove the old bulb

The light housing is usually at the top of the fridge interior or tucked into the back wall, behind a clear or frosted plastic cover.

1. Empty the shelf below. Bits and pieces have a habit of falling once you start, so clear some space underneath.
2. Release the cover. Most covers either unclip or slide off. Look for a small tab or groove at one end and ease it free gently. Some twist a quarter turn; others slide towards the back of the fridge. If it doesn't move easily, you're probably pushing the wrong way rather than needing force.
3. Remove the bulb. A traditional bulb unscrews anticlockwise, just like a household lamp. A push-fit or bayonet type pushes in slightly and twists. If it's an LED unit rather than a separate bulb, the whole module usually unclips as one piece.
4. Take the old bulb with you when buying a replacement. Matching it by sight is far quicker than guessing.

Choosing the right replacement bulb

This is where people most often come unstuck. A fridge bulb is not always the same as a standard household one, and fitting the wrong type is the easiest way to end up back where you started.

When you remove the old bulb, check it (or its housing) for the key details:

• The fitting type. Screw fittings and bayonet/push-fit caps are common, and they're not interchangeable.
• The wattage and voltage. These are usually printed on the bulb or moulded into the base. Stick to the same rating. Fitting a higher wattage than the housing is designed for can overheat the fitting.
• Whether it's a heat-rated appliance bulb. Fridge bulbs are made to cope with cold and damp. An ordinary bulb may not last in those conditions.
• LED versus incandescent. Some fridges use a sealed LED strip or module. If yours does, you can't swap a single bulb; you replace the whole unit, and it needs to be the correct part for your model.

If you're unsure, your appliance model number (usually on a sticker inside the fridge or around the door frame) will help a parts supplier match the exact bulb.

Fit the new bulb and test

1. Screw or push the new bulb into the holder until it's seated firmly. Don't overtighten a screw fitting; snug is enough.
2. Clip or slide the cover back into place. You should feel it click home.
3. Plug the fridge back in and switch it on at the wall.
4. Open the door and check the light comes on. Press and release the door switch a couple of times to confirm it responds properly.

If the new bulb lights up, job done. Pop the shelf back and you're finished.

When it's not the bulb: switch and wiring faults

Fitted a fresh bulb and still no light? At that point you've effectively ruled out the cheap, simple cause. The usual culprits are:

• A faulty door switch. If the plunger is stuck, broken or no longer making contact, the light won't trigger when the door opens. A switch that stays pressed in can also leave the light off.
• A wiring fault. Loose, corroded or damaged connections behind the light fitting will stop power reaching the bulb.
• A failed LED module or control board. On fridges with integrated LED lighting, the fault can sit in the module or the electronics that drive it.

These are best left to an engineer. Diagnosing a switch or wiring issue means getting into the fridge's electrics safely and testing for continuity, which isn't a guess-and-replace job.

Get it fixed properly

If you've replaced the bulb and the light still won't work, or you'd simply rather not poke around inside the appliance, we can help. NAC engineers are fully trained across all the major brands and can diagnose and repair fridge lighting faults, door switches and wiring problems.

We quote a service charge before an engineer attends, and that covers all labour, the callout and VAT where it applies. The only thing on top is parts, if any are needed, and we'll quote those separately before we carry out the work. Any repair is backed by our guarantee.

Book a repair or call us on 0333 016 9622 and we'll get someone out to you, often the same or next day where possible.

Related guides

• How to change an oven light bulb: easy step-by-step guide
• Oven light not working after changing the bulb? Fixes
• How to clear a blocked fridge drain hole (stop the water)
• How to set the right fridge freezer temperature