Electric gate faults follow predictable patterns. After fifteen years of engineering feedback from gate installers and repair engineers across Surrey, the same failure modes come up repeatedly: motor wear from inadequate lubrication, control board failure from moisture ingress, photocell misalignment after a collision or frost movement, hinge wear from a gate that was never correctly set up, and track contamination on sliding systems. Understanding what causes these failures, what symptoms they produce, and what a repair involves helps you respond quickly when something goes wrong and gives you a basis for assessing whether the repair quote you receive is reasonable.
Gate Stops Mid-Travel and Reverses
A gate that stops partway through its travel and reverses is usually responding to a safety system trigger. The most common cause is photocell misalignment: the infrared beam from transmitter to receiver has shifted, causing the control board to interpret the broken beam as an obstruction and stop the gate. This happens most often after a vehicle has clipped the photocell housing, or after a period of ground frost that has moved the post or the bracket the photocell is mounted on.
The fix is realignment of the photocell transmitter and receiver so that the beam is restored. This is a simple adjustment that takes ten to fifteen minutes for an experienced engineer. Before calling an engineer, check whether anything obvious has shifted near the gate opening. Do not attempt to defeat or bypass the photocell to keep the gate operating: the photocell is a safety system and bypassing it is dangerous and illegal.
Less commonly, the gate stops mid-travel because the motor torque limit has been reached due to a mechanical obstruction in the gate arc or track. On a swing gate, this is often a hinge that has dropped and the gate leaf is dragging on the ground. On a sliding gate, it is often debris or ice in the track channel.
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Gate Moves Slowly or With Reduced Power
Slow or laboured gate movement usually indicates a motor or gearbox that is overdue for lubrication. Gate motors require regular greasing of the drive mechanism. When the lubrication breaks down, the motor works harder to drive the same load, temperatures inside the unit rise, and wear accelerates. If left unserviced, the motor will eventually fail entirely. Annual servicing that includes lubrication of the drive mechanism prevents this failure mode completely in the majority of cases.
Battery backup failure is another cause of reduced performance. Most gate systems include a battery backup that maintains operation during power cuts. A battery that has reached the end of its service life draws excessive current from the motor supply, reducing available motor power during normal operation. Battery replacement during an annual service is the correct approach.
Gate Does Not Respond to Remote Control
A gate that does not respond to the remote but can be operated from the button if the gate system has one is almost always a remote control fault rather than a gate fault. The most common causes are: flat remote battery, remote that has lost its programming, or receiver aerial that has been disconnected or damaged. Replace the battery first. If the remote still does not work, reprogram it to the receiver following the installer's handbook for the specific motor brand.
A gate that does not respond to any means of operation should be treated as a control board or power supply fault. Check the circuit breaker for the gate supply at the distribution board. If power is present at the gate and the gate still does not operate, the control board or transformer has likely failed and requires an engineer visit.
Gate is Stuck Open
A gate stuck in the open position is a security concern that should be treated as urgent. The most common cause is a power failure combined with a battery backup that has discharged, leaving the gate open and without the means to close under motor power. Use the manual release mechanism to close the gate manually. The manual release procedure is specific to the motor brand and model: the installer should have demonstrated this at handover and it should be documented in the handover pack.
A gate stuck open due to a limit switch fault, which is less common, requires an engineer to reset or replace the switch. Limit switches define the fully open and fully closed positions for the motor. When a limit switch fails, the motor does not know the gate has reached the correct position and will not stop or hold the gate in position.
Hinge Wear and Dropping Gates
Hinge wear is one of the most common causes of gate system problems on older Surrey installations. A gate leaf that has dropped due to worn hinges creates several problems simultaneously: the gate drags on the ground or strike plate, the motor works harder to drive the gate against this resistance, the safety edge activates when the dragging gate contacts the ground surface, and the increased load accelerates motor wear.
Hinge replacement is straightforward on most gate types and should be done at the point when the drop becomes noticeable rather than waiting for a more serious failure. An engineer attending a gate fault related to hinge wear will typically address both the hinge and any motor wear that has resulted from the additional load.
What a Gate Repair Costs in Surrey
A standard diagnostic callout from a Surrey gate engineer, covering the site visit, fault diagnosis, and a written repair assessment, typically costs £80 to £120 plus VAT. Repairs completed on the same visit using parts carried on the van carry the additional parts cost: photocell replacement £60 to £120, safety edge replacement £80 to £150, control board replacement £150 to £350 depending on brand and model, motor replacement £350 to £700 for a quality branded unit. Hinge replacement varies significantly depending on gate type and hinge specification, from £150 to £500 for a standard residential installation.
Annual servicing, which prevents the majority of the failure modes described above, costs between £130 and £220 for a standard Surrey residential gate system. Over a ten-year period, regular servicing costs less than a single unplanned motor replacement and produces substantially better gate performance and longevity throughout.
