Aircon parts reference

Aircon indoor PCB failure in Singapore looks like loose wiring or a bad sensor. Remote works, cooling never starts. Board testing tells.

Weak airflow reads as motor failure, but a clogged filter or fouled coil does the same. Clean both first, then measure motor speed against spec.

Weak airflow and indoor noise can come from a dirty or damaged blower wheel. How to separate blower issues from motor and filter faults.

Normal pressure with a fouled coil points to dirt. Low pressure with a clean one points to a leak. A chemical wash fixes only the first.

A blocked filter is the most common cause of weak aircon cooling. How to check yours, when to clean it, and when a service visit is due.

Point the remote at a phone camera: a visible pulse means the remote is fine, so the fault sits in the receiver or the indoor control board.

Swing flap not moving or stuck in one angle? How louvre swing motor faults differ from vane linkage jams, remote issues, and indoor PCB faults.

Early cut-off with a warm room points at sensor drift, but blocked airflow cycles the same way. A side-by-side reading tells them apart.

Status lights and manual buttons on the indoor unit. When the panel responds but the remote does not, the fault sits in the signal path.

Drips from the casing rather than the drain outlet point at torn or waterlogged foam. A blocked drain or a frozen coil mimics the same pattern.

Outdoor PCB failure in Singapore mimics a dead compressor. Indoor unit runs fine but nothing cools. Signal and power tests confirm board failure.

The fan motor is the last suspect, not the first. A weak shared capacitor and a fouled outdoor coil both slow the blade and mimic motor failure.

Outdoor noise, vibration, or weak heat release can come from a damaged fan blade. How blade faults differ from motor and bracket faults.

Aircon compressor in Singapore: what it does, how it fails, and why capacitor, board, and gas faults must be ruled out before replacement.

The start capacitor gives the compressor or fan motor the jolt needed to spin from standstill. When it fails, the motor hums but stalls.

Aircon run capacitor guide for Singapore: what it does, how weakening shows up, and when a 'dead compressor' symptom is really a capacitor fault.

Aircon dual run capacitor in Singapore: why one weak component makes compressor and outdoor fan fail together, and how testing proves it.

Outdoor unit stops or cools then cuts out? How compressor overload protector faults differ from capacitor and airflow heat-load faults.

Weak cooling and high outdoor heat can come from dirty or damaged condenser coil. How condenser coil faults differ from fan, refrigerant issues.

A drifting sensor shuts the unit down when nothing is overheating. A dirty outdoor coil causes real overheating, so the coil is cleaned first.

Overview of outdoor switching faults. How we narrow down contactor vs relay-related startup problems before recommending any replacement.

The sensor is only at fault when its reading disagrees with the gauges. Low refrigerant produces the same erratic cut-outs and fault codes.

No cooling, trips, or unstable inverter behavior can involve the inverter power module. How IPM faults differ from outdoor PCB and sensor issues.

Wall humming has two rubber sources: pads under the outdoor unit and mounts around the compressor. Each wears out with its own noise pattern.

Outdoor unit vibration and noise can come from bracket issues. How bracket faults differ from fan blade, motor, and rubber support problems.

A sealed circuit never consumes refrigerant, so a low charge always means a leak. Refilling without tracing the source repeats the loss.

Cooling loss and repeat gas issues can come from the copper pipe set. How pipe-set faults differ from flare-joint leaks and service valve leaks.

Slow gas loss can come from a leaking flare joint. How flare-joint leaks differ from coil leaks and service valve leaks before a top-up.

Brass fittings that open the sealed circuit during service work. Left part-closed or leaking, they show up as poor cooling after a visit.

Unstable aircon cooling in Singapore is often misdiagnosed as a gas leak. Pressure and valve response tests confirm the expansion valve.

A cooling-only aircon does not have one. Where the valve exists, a stuck one locks the unit into one mode, and a weak compressor mimics it.

A restricted capillary tube looks exactly like low gas until pressure is compared running against stopped. Leak and airflow checks come first.

Water tracking down a pipe means the foam jacket, the Armaflex, has torn. Drips at a fitting or ice on the pipe point to a system fault.

The smaller of the two pipes runs warm and stays dry. Sweat or frost on it means the charge or the insulation is at fault, not the pipe.

Frost spreading from the indoor coil is a charge or airflow problem. Frost stuck to one spot is a kink. Dripping is almost always foam.

Algae and sludge blocking the pipe cause most indoor water leaks. A flush clears them. A leak that persists points to the pan or the coil.

Indoor water leaks can come from a cracked or misaligned drain pan. How drain pan faults differ from drain pipe blockage and float switch trips.

Gurgling, slow drainage, or odd leak patterns can come from a drain trap or loop issue. How this differs from drain blockage and pump faults.

Aircon keeps shutting off from a drain issue? How float switch faults differ from drain blockage, drain pan faults, and other shutdown causes.

Cassette and ducted units need a pump to lift condensate. If the motor runs but water stays put, the blockage is downstream, not the pump.

A dead remote and a dead infrared receiver look identical from the sofa. A phone camera check separates them before any part gets ordered.

No power or unstable outdoor startup can come from the isolator switch. How isolator faults differ from breaker and outdoor PCB faults.

Burning smell, on-and-off startup, or breaker trips can come from hot terminal connections. How this differs from capacitor and contactor faults.

Indoor and outdoor units pass signals through the interconnect wire. How communication-wire faults differ from PCB and terminal faults.