You’ve probably seen FoamJet mentioned and wondered: is this just a gimmick with a fancy name, or does it actually do something different? And if it does something different — does that mean your aircon is getting less of what it actually needs?
Fair questions. Here’s a straight answer.
What “normal” aircon servicing actually covers
When most people think of aircon servicing, they mean a standard general service: filter wash, blower wash, drainage vacuum, and a check of the unit. That’s the baseline — and it should happen every 3 to 6 months in Singapore’s climate.
FoamJet doesn’t replace any of that. Every FoamJet service includes all the standard steps. The foam is what happens on top of them.
What actually happens during a FoamJet service
Here’s the full process, in order.
1. Airflow check before anything starts The technician measures airflow from your unit using an anemometer. This is the baseline — so there’s a before reading to compare against at the end.
2. AC jacket goes on The unit and surrounding area are covered before any water or foam is applied. Your walls, furniture, and flooring are protected throughout.
3. Foam applied to filters, coils, blower, and drain tray This is the FoamJet part. The foam compound is applied directly to the components that accumulate the most grime — including the evaporator coil, which a standard rinse doesn’t reach thoroughly. The foam breaks down dirt and grease trapped between the fins and suspends it for removal.
4. Jet-spray wash Every part of the unit is flushed through with a jet spray — getting into corners and gaps that a brush or cloth can’t reach. All the loosened dirt comes out here.
5. Dirty water collected The water flushed out goes into a pail — not onto your floor. You’ll see what came out of your unit. For most aircons that haven’t been serviced recently, it’s not pretty. That’s the point.
6. Drainage pipe declogged with vacuum The drain pipe is vacuumed clear of residue. A blocked drain pipe is one of the most common causes of water leakage from aircons — this step specifically prevents it.
7. Final test and clean-up The unit is tested before the technician leaves. Airflow is measured again — the after reading. The surrounding area is cleaned and left as it was found.
Does the foam damage the coils?
No. The compound isn’t the harsh chemical used in a chemical overhaul. It doesn’t strip coatings, corrode fins, or require the unit to be dismantled. It breaks down organic dirt and grime — the same way a cleaning foam works on a surface — and washes off completely during the jet-spray step.
Chemical overhaul is a different, more intensive process for units with significant buildup or persistent performance issues. FoamJet is a deeper version of routine servicing, not a step toward chemical overhaul territory.
How do you know it actually worked?
The before-and-after airflow readings tell you. Airflow is measured at the start and again at the end — if the clean made a difference, you’ll see it in the numbers. Photos of the coils before and after are captured in the app. The dirty water is shown on completion.
Most aircon companies don’t do this. Once the technician leaves, there’s no way to verify what was actually done. The proof-of-work record exists precisely because a claim without evidence isn’t worth much.
When is FoamJet not enough?
FoamJet handles routine maintenance well — even for units that haven’t been serviced in a while. But it isn’t a fix for everything.
If your aircon is blowing warm air, leaking water, making unusual noises, or tripping the power, those are repair issues that need diagnosis first. FoamJet servicing won’t resolve a refrigerant leak or a faulty component. Urban Company offers separate repair services with a $60 diagnosis fee — waived if you proceed with the repair.
If the coil buildup is severe enough — usually from years without servicing — a chemical overhaul may be recommended. A good technician will tell you honestly whether you need it. They shouldn’t be recommending it as a default after every routine visit.
What does FoamJet servicing cost?
$23/unit for a one-off service. $20/unit on an annual contract, available as 2x, 3x, or 4x per year.
Most Singapore households run 2 to 3 units. Servicing all of them in one visit is usually the practical choice — the technician is already there, and per-unit pricing means no penalty for doing them together.
Book a FoamJet aircon service →
Does FoamJet replace standard aircon servicing?
Yes. FoamJet includes all the standard servicing steps — filter wash, blower wash, drainage vacuum — plus foam cleaning of the evaporator coil, blower, and drain tray. It’s a more thorough version of routine servicing.
Is the foam compound safe for aircon coils?
Yes. The foam breaks down dirt and grime trapped in the coils and washes off completely during the jet-spray step. It isn’t the harsh chemical compound used in a chemical overhaul and doesn’t damage coil fins or coatings.
Why does so much dirty water come out during FoamJet servicing?
That’s the grime that was sitting in your coils. The dirty water is flushed out and collected in a pail as part of the process — your floors stay dry. It’s confirmation the cleaning worked, not a sign something went wrong.
Will the technician make a mess in my home?
No. The AC jacket covers the unit and surrounding area before any water or foam is applied. Dirty water is collected in a pail. The technician cleans up and tests the unit before leaving. The process is specifically designed to contain mess at every step.
How is FoamJet different from a chemical overhaul?
A chemical overhaul is an intensive process for units with severe buildup or persistent performance issues — it typically involves full dismantling of the unit. FoamJet is a deeper version of routine maintenance for well-functioning units. Your technician will advise honestly if a chemical overhaul is genuinely needed.
How often should I get FoamJet servicing done?
Every 3 to 6 months is standard for Singapore’s climate. If you’re running your aircon heavily — which most households are — leaning toward every 3 months keeps performance consistent and prevents buildup from compounding.
What if my aircon still isn’t cold after servicing?
Less cooling is a repair issue, not a servicing one. It usually points to low refrigerant, a blocked condenser, or a faulty component. Urban Company offers a less-cooling repair service with a $60 diagnosis fee, waived if you proceed with the repair.
What does FoamJet servicing cost in Singapore?
$23/unit for a one-off service. $20/unit on an annual contract (2x, 3x, or 4x per year). Most households service 2 to 3 units per visit.
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