Lights getting brighter instead of dimmer — why?

Your lights getting brighter instead of dimmer typically indicates a failing dimmer switch, incompatible bulbs, or a wiring issue. This is a safety concern that needs immediate attention from a licensed electrician.

The most common cause is LED bulbs that aren't compatible with your dimmer switch. Many older dimmer switches were designed for incandescent bulbs and can't properly control LED lights. When an incompatible LED is connected to the wrong dimmer type, it can cause erratic behavior including getting brighter when you expect it to dim. The solution is installing an LED-compatible dimmer switch, which requires different internal circuitry to handle the lower wattage and electronic drivers in LED bulbs.

Failing dimmer switches can also cause this reverse behavior. Inside a dimmer switch, electronic components control the amount of power flowing to your lights. When these components start to fail, they can send incorrect signals, causing lights to brighten instead of dim. This is particularly common with older dimmer switches or those that have been overloaded beyond their rated capacity.

Loose wiring connections present another serious possibility. If the connections behind your dimmer switch are loose or corroded, they can create resistance that affects how the dimmer functions. This is especially dangerous because loose connections generate heat and can cause fires. In New Brunswick's humid maritime climate, corrosion of electrical connections is more common than in drier regions.

Safety concerns make this issue urgent. A malfunctioning dimmer switch can overheat, potentially causing a fire. If you notice any burning smell, crackling sounds, or the switch feels hot to the touch, shut off the circuit breaker immediately and call an emergency electrician. Never attempt to troubleshoot this yourself - dimmer switches involve live electrical connections that can be lethal.

TSANB requirements mandate that any dimmer switch replacement must be done by a licensed electrician, and depending on your home's age, the work may require a permit. Modern LED-compatible dimmers also need proper wire gauges and connections to function safely.

Immediate steps: Stop using the dimmer switch and leave the lights in their current position. Don't try to adjust the dimmer further, as this could worsen the problem. Contact a licensed electrician to diagnose whether you need a new LED-compatible dimmer, have wiring issues, or both.

Need help finding an electrician? New Brunswick Electrical can match you with local licensed professionals who can safely diagnose and fix your dimmer switch issues.