Drain clear · Same-week fix · All brands · No call-out fee

Aircon Leaking Water?
Here's What's Causing It

Q: How much does it cost to fix an aircon leaking water?

A chemical wash (which includes drain clearing) costs $60 for 1 unit, $50/unit for 2 or more. If the drain pipe has a more serious blockage or the tray is cracked, there may be an additional repair charge. We advise on-site before proceeding.

In Singapore, the most common cause of a leaking aircon is a blocked condensate drain pipe — water that should drain away builds up and overflows. A chemical wash with drain flush clears it in one visit. We'll diagnose on-site and fix the same day.

WhatsApp for a same-week slot See common causes

$60

Chemical wash from

Same visit

Diagnose & fix

All brands

Daikin, Mitsu, LG…

Common Causes

Why is your aircon leaking water?

Blocked condensate drain pipe

By far the most common cause. As the aircon cools the room, it pulls moisture from the air — this water drips into a drain tray and flows out through a small pipe. Over time, algae, mould, and debris block the pipe. Water backs up in the tray and overflows through the front of the unit onto your floor or ceiling below.

Fix: Drain flush (included in chemical wash)

Dirty evaporator coil

A heavily fouled coil disrupts the normal condensation pattern — instead of water dripping neatly into the drain tray, it runs along the coil fins and drips off in unpredictable places, often straight through the front of the unit. Chemical wash clears the coil and restores proper drainage.

Fix: Chemical wash

Frozen coil (ice melting)

If refrigerant is low, the evaporator coil can drop below freezing and ice up. When the unit is turned off — or the compressor cycles off — the ice melts and dumps a large amount of water, often more than the drain tray can handle. You'll typically notice this as intermittent heavy dripping after the unit runs for a while.

Fix: Gas top-up + chemical wash

Cracked or misaligned drain tray

The plastic drain tray that sits under the evaporator coil can crack over time — especially in older units — or shift out of position during servicing by someone else. Water then bypasses the tray entirely. This is less common but easy to spot on inspection. The tray can often be reseated or replaced.

Fix: Tray replacement or reseating

What We Do

How AFIX stops your aircon from leaking

We identify the exact source of the leak on-site, fix it that visit, then run a drain test before we leave so you know it's sorted.

Locate the leak source

We open the unit and trace where the water is coming from — drain tray overflow, dripping coil, or melting ice — before touching anything else. This tells us exactly what's needed.

Clear the drain pipe

We flush the condensate drain line with water or a vacuum, clearing the blockage. For stubborn algae buildup, we use a chemical drain treatment. We check the full pipe length from unit to discharge point.

Chemical wash the coil (if needed)

If coil fouling is contributing to the leak, we do a full chemical wash — flushing the coil and tray together. This is usually the right call for units that haven't been serviced in 6+ months.

Check refrigerant if ice was present

If we find ice on the coil, we check refrigerant pressure with a manifold gauge. Low pressure means a slow leak — we top up the gas and advise on whether the leak source needs attention.

Drain test before we leave

We pour water into the drain tray and confirm it flows freely to discharge. You'll see the result in real time — no more guessing if the issue is fixed.

Pricing

What it costs to fix an aircon leaking water

Most water leaks are resolved with a chemical wash that includes drain clearing. We quote before we start and don't add charges on arrival.

Most common fix

Chemical Wash + Drain Clear

Full clean with drain flush & test

1 unit$60

2 units onwards$50 / unit

Drain testIncluded

Book via WhatsApp ↗

Includes coil flush, full drain clear, before & after photos.

Standard

Normal Servicing + Drain Check

If coil is reasonably clean

1 unit$50

2 units$30 / unit

3+ units$25 / unit

Book via WhatsApp ↗

Includes drain flush and drain test. Upgrade to chemical wash if coil is dirty.

Not sure which you need? If the unit is dripping heavily or has ice on it, go straight for a chemical wash — it covers everything. If it's a minor drip and the unit is cooling well, a standard service with drain check may be enough. Ask us on WhatsApp →

FAQ

Aircon leaking water — your questions answered

Still not sure? Just ask us directly.

Ask on WhatsApp →

Why is my aircon leaking water?+

The most common cause is a blocked condensate drain pipe. As the aircon cools the room, it removes moisture from the air — this water normally drains away through a pipe. When that pipe gets clogged with algae or debris, water backs up and overflows through the indoor unit. A dirty coil, low refrigerant causing ice, or a cracked drain tray are other causes.

Is it dangerous if my aircon is dripping water?+

Not immediately dangerous to people, but it can cause water damage to your ceiling, wall, and flooring — and mould if left too long. Turn off the unit if it's dripping heavily and get it looked at within a day or two. If water is dripping near electrical components, that's a more urgent risk.

Will a chemical wash fix my aircon leaking water?+

In most cases, yes. Chemical wash clears the coil buildup and thoroughly flushes the drain pipe — addressing the two most common causes of leaking. We always run a drain test after the wash to confirm water is flowing freely before we leave.

How much does it cost to fix an aircon leaking water?+

A chemical wash with drain clear costs $60 for 1 unit, $50/unit for 2 or more. If the drain pipe has a more serious blockage requiring additional work, or the drain tray is cracked and needs replacing, there may be an extra charge — we'll advise on-site before we proceed. No call-out fee.

Can you come the same week to fix my leaking aircon?+

Yes — WhatsApp us and we'll confirm a same-week slot. Leaking aircons are treated as priority jobs since water damage can escalate quickly. For heavy leaks, let us know and we'll try to fit you in as soon as possible.

Aircon Leaking Water?Here's What's Causing It