Security Lights · PIR Sensors · Garden Lighting · Kettering

Outdoor Lighting Repairs for Security, Garden and Driveway Lights

Exterior lights fail differently from indoor lights. Rain, condensation, wind movement, corroded terminals, damaged cable and faulty PIR sensors can all create intermittent faults that need testing, not guesswork.

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Sensor Faults
RCD
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Exterior Light Faults

Why Outdoor Lights Need Proper Diagnosis

Outdoor lighting faults can be frustrating because they often appear and disappear. A security light may work in dry weather but trip the RCD in rain. An outside light may stay off completely, while a PIR light may stay on all night, fail to trigger, or switch randomly when wind moves branches. Garden lights may flicker because moisture has entered a junction box rather than because the lamp itself has failed.

Entigen repairs and diagnoses security lights, PIR sensor lights, wall lights, driveway lighting and garden lighting faults across Kettering and Northamptonshire. The aim is to find the cause: water ingress, failed seals, corroded terminals, poor cable entries, damaged external cables, faulty lamps, failed LED drivers or an issue further back on the circuit.

Not Every Fault Means Replacement

Some exterior lights can be repaired. Others are better replaced because the fitting is no longer weatherproof or the LED driver is built into a sealed unit. We check before recommending parts.

Wall-mounted outdoor security floodlight
Common Causes

Common Outdoor Lighting Faults

Exterior faults often need insulation testing and inspection, especially when rain or temperature affects the symptom.

Moisture ingressWater inside fittings, junction boxes, PIR heads or cable entries can create earth leakage and intermittent trips.
Faulty PIR sensorsSensor heads can fail, fill with condensation, react to movement incorrectly, or stop switching the light reliably.
Outdoor lights tripping RCDsRCD trips often point to water ingress, damaged cable, corroded terminals or failing drivers rather than a simple lamp fault.
Corroded connectionsTerminals and joints exposed to damp air can corrode, loosen or overheat, especially where the enclosure seal has failed.
Damaged external cablesCables can be clipped in vulnerable positions, damaged by ladders or gardening, or move in wind until a connection works loose.
Lamps and LED driversReplaceable lamps, sealed LED fittings and drivers fail in different ways. Testing avoids replacing the wrong part.
Weather Protection

IP Ratings for Outdoor Lighting

An IP rating describes how well an enclosure resists solids and water. For outdoor lighting, the correct rating depends on exposure, position, mounting angle, cable entry and the manufacturer's instructions. A sheltered porch light has a different risk profile from a driveway floodlight or garden spike light exposed to rain and splash.

The rating only works when the fitting is installed correctly. A good IP-rated fitting can still fail if the cable gland is wrong, the seal is trapped, the cover is cracked, the fitting is angled against instructions, or a junction box nearby is not suitable for the location.

Intermittent Faults

Why Faults Appear After Rain, Wind or Cold Weather

Rain can lower insulation resistance where water enters a fitting or joint. Condensation can bridge terminals overnight and then dry out before anyone inspects it. Wind can move a cable or PIR head just enough to expose a loose connection. Temperature changes can affect failed seals and old plastic housings.

This is why "it only trips when it rains" is useful diagnostic information. The circuit may test differently dry than wet, so we use the symptom pattern, inspection and electrical testing together.

Safe Immediate Steps
  1. 1
    Turn the affected circuit off if there is water ingress, burning smell, visible damage, repeated tripping or a damaged fitting.
  2. 2
    Do not keep resetting an RCD that trips when outdoor lights are switched on. Repeated resets do not fix water or insulation faults.
  3. 3
    Do not open outdoor fittings in wet conditions unless you are competent, the circuit is isolated, and it has been proved dead.
  4. 4
    Keep people away from damaged fittings or exposed cable, especially around paths, driveways, gates and garden areas.
  5. 5
    Call a qualified electrician if the fault involves tripping, moisture, burning smell, intermittent operation or damaged exterior cable.
When to Call

When an Outdoor Lighting Fault Needs an Electrician

Call an electrician when a light trips the RCD, behaves differently in wet weather, has visible water inside, shows corrosion or burn marks, has a damaged cable, or the PIR sensor keeps triggering incorrectly. Exterior faults often involve moisture and fixed wiring, so proper testing matters.

Attendance depends on workload, urgency, access and location. If the circuit can be safely isolated and the area made safe, a repair can often be planned. If there is burning smell, exposed conductors, repeated RCD tripping or water in live equipment, treat it as urgent and contact us for advice.

Hub
Electrical Faults & Fixes
Common home faults →
Related Fault
RCD Keeps Tripping
Water ingress and leakage faults →
Urgent
Emergency Electrician
Damaged or wet electrics →
Domestic
Domestic Electrical Services
Outdoor lights and repairs →
Our Process

How We Diagnose Outdoor Lighting Faults

01
Symptom Pattern
We ask when the light fails: rain, wind, darkness, motion trigger, temperature change, or immediately when switched on.
02
Safe Isolation
The affected circuit is isolated before fittings, junction boxes or PIR heads are opened for inspection.
03
Visual Inspection
We inspect cable entries, seals, glands, corrosion, water marks, cracked housings, loose terminals and damaged exterior cable.
04
Electrical Testing
Where needed, we test insulation resistance, continuity, polarity and RCD operation to prove whether the fault is the fitting, cable or circuit.
05
Repair or Replace
We explain whether the light can be repaired or whether replacement is more reliable because the fitting is no longer weatherproof.
Testing, Not Guessing

Swapping a fitting without testing can leave the real fault in place. If the issue is moisture in a junction box or damaged cable, a new light may fail or trip the same circuit again.

Part P Note

Not every outdoor light repair is automatically Part P notifiable. Simple like-for-like repairs differ from new circuits or significant fixed-wiring alterations. If the scope changes, we explain the compliance position before proceeding.

Repair or Replace

When Outdoor Lights Can Be Repaired

Repair May Make Sense
  • The cable entry or terminal connection is loose but the fitting is otherwise sound.
  • A replaceable lamp, PIR head or separate driver has failed.
  • The junction box can be replaced with a suitable weatherproof enclosure.
  • The IP seal is intact and the fitting has not corroded internally.
  • The circuit tests correctly after the fault is corrected.
Replacement Is Often Better
  • The fitting is full of water or badly corroded.
  • The LED driver is built into a sealed fitting and has failed.
  • The cover, seal, hinge, lens or cable gland has failed.
  • The fitting's IP rating or installation position is unsuitable.
  • The old light has repeated faults even after basic repairs.
Common Questions

Outdoor Lighting Repair FAQs

An outdoor light that trips the RCD usually has an earth leakage fault. Common causes include water inside the fitting, moisture in a junction box, damaged cable, a failed LED driver, corroded terminals or a faulty PIR sensor. The circuit needs testing rather than repeated resetting.
Some outdoor lights can be repaired if the fault is a loose connection, damaged cable entry or replaceable lamp. Others are better replaced, especially where the fitting is badly corroded, the seals have failed, the LED driver is built in, or the enclosure is no longer weatherproof.
The correct IP rating depends on exposure, position and the manufacturer's instructions. A sheltered porch light has different conditions from a driveway floodlight or garden fitting exposed to rain and spray. The fitting, cable entries and junction boxes all need to suit the location.
Attendance depends on workload, urgency, access and location. If there is water ingress, burning smell, visible damage or repeated RCD tripping, stop using the affected circuit and contact us so we can advise the safest next step.
Rain-related tripping usually points to moisture entering a fitting, PIR sensor, cable gland, junction box or damaged cable. The fault may disappear when dry, but the insulation resistance can drop again as soon as moisture returns, so testing is needed to find the real source.
Fault Support

If your issue sounds similar, these pages may help you understand the fault before getting in touch.

Security Light Not Working Garden Lighting Faults RCD Keeps Tripping Electrical Faults & Fixes Contact Entigen

Outdoor Light Fault in Kettering?

Tell us what type of light it is, when the fault happens, whether the RCD trips, and whether rain or wind affects it. We will confirm the practical next step before attending.

Phone
01536 645661
Mobile
07950 512246
Email
sales@entigen.co.uk
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