Air Conditioning Repair and Servicing

When the system runs but does not cool

First check that the controller is set to cooling rather than fan-only mode and that the target temperature is below the room temperature. Beyond those basic settings, poor cooling may involve restricted airflow, a dirty coil, a fan problem, a sensor fault or a refrigeration issue. On a multi-split, conflicting mode requests can also affect operation. Note which rooms are affected and how long the system runs before performance changes; this is more useful than repeatedly lowering the setpoint.

Water leaking from an indoor unit

Cooling produces condensate that should leave through a drain or a suitable pump arrangement. A blocked drain, failed condensate pump, damaged connection or incorrect fall can cause water to escape indoors. Ice forming on the coil may also melt and overflow, so clearing a pipe alone might not resolve the underlying fault. Stop using a leaking unit if water could damage finishes or reach electrical equipment, and avoid removing covers to investigate wiring or internal components yourself.

Error codes and intermittent faults

Photograph the full error display before attempting any reset, and keep the make and model details available for the visit. Codes indicate the area in which a controller has detected a problem, but do not always identify a single failed part. An intermittent communication warning can require different checks from a temperature sensor error. Repeated resets may temporarily remove the display without correcting the cause, so record when the fault returns and whether it follows a particular operating mode.

Annual servicing and cleaning accessible filters

An annual service is a useful starting point for many domestic systems, with frequency adjusted for usage, environment and manufacturer guidance. Servicing can include examining accessible coils, airflow, drainage and electrical condition, alongside performance checks appropriate to the equipment. Between visits, clean removable filters only as the user manual describes, with the unit safely switched off. Allow washable filters to dry fully before refitting them; chemicals, high-pressure washing or disturbing fixed components can damage equipment rather than improve efficiency.

Refrigerant loss and F-Gas leak checks

Refrigerant circulates in a sealed circuit and should not need routine topping up as though it were fuel. If measurements suggest a low charge, the cause needs investigation and an appropriate repair before recharging to the required specification. Statutory F-Gas leak-check obligations depend on the refrigerant, charge and applicable regulations, not simply on the age of the appliance. We distinguish those requirements from checks undertaken during diagnosis or servicing and explain what applies to the system being examined.

Repair decisions and arranging access

Parts availability, equipment age and the condition of coils or major components can influence whether a repair is sensible. We discuss findings and the proposed cost before proceeding, including whether a return visit is needed for ordered parts. For bookings, call Pro Plumbers on 01732 444555; our base is 11 Lime Tree Walk, Sevenoaks TN13 1YH. The diagnostic visit has a minimum charge of £90 + VAT, including the first hour on site, with additional work discussed in relation to the fault found.