Overview
One Click Dubai repairs chillers across Dubai, with an engineer on site the same day and within the hour for a plant that has stopped. We repair air-cooled and water-cooled chillers of every size and type, from villa water tank chillers to scroll, screw and centrifugal machines serving towers, hotels, malls, factories and process lines.
A chiller that trips at two in the afternoon in August is an emergency for everyone in the building. This page explains why chillers stop cooling, what the operator can check and record before we arrive, how each kind of fault is repaired, and what decides whether a chiller is repaired, overhauled or replaced.
Our own engineers carry out compressor overhauls, refrigerant recovery and recharge, leak repairs and tube repairs. The work is not passed to a third party.
Chiller repair in Dubai: the short answers
Chiller repair in Dubai from One Click Dubai starts with a diagnostic visit. The engineer reads the alarm history, takes pressures, temperatures and electrical readings, identifies the fault, and gives a written quotation before any repair work.
If you searched for chiller repair near me, we cover all of Dubai from Al Quoz, including the industrial areas, and attend sites in towers, plant rooms and on roofs.
Chiller troubleshooting: not cooling, by what you see
Chiller troubleshooting begins at the control panel. A chiller not cooling has either stopped on a safety, or is running and cannot move enough heat. The control panel tells you which. A machine that has tripped shows an alarm. A machine that runs with warm leaving water has a capacity problem: low refrigerant, fouled heat exchangers, low water flow or a compressor that is not loading.
The first two rows account for most summer breakdowns in Dubai. High pressure trips rise sharply when ambient temperatures pass 45 degrees and condensers are dirty. Low pressure trips usually trace back to a leak that has been slowly reducing the charge for months.
What to check and record before the engineer arrives
The readings an operator takes in the first ten minutes often cut an hour from the diagnosis. Record them before resetting anything, because a reset clears evidence.
The active alarm, and the alarm history with times.
Chilled water entering and leaving, and on water-cooled plant, condenser water entering and leaving.
Suction and discharge for each circuit, if the panel displays them.
Are the chilled water and condenser water pumps running? Are their isolating valves open?
Air-cooled: are all fans turning, and are the coils clear? Water-cooled: is the cooling tower fan running and the basin full?
Any tripped breakers, blown fuses or phase failure indication at the panel.
Recent maintenance, a power interruption, a valve that was shut, a new tenant load.
What not to do
If one chiller in a multi-chiller plant has failed, check that the others have picked up the load and that the building's critical areas are being served first.
Air-cooled chiller repair
Air-cooled chiller repair in Dubai is dominated by the condenser. An air-cooled chiller rejects its heat straight to outdoor air, and at 45 to 50 degrees ambient it is working at the limit of its design. Anything that reduces airflow or heat transfer across the coil pushes the head pressure to the trip point.
Why summer exposes weak chillers
Every degree of rise in condensing temperature costs capacity and adds current. A chiller with 20% of its coil face blocked may run acceptably in March and trip daily in July. Coil cleaning before the summer is the cheapest repair there is, and many summer breakdowns we attend would not have happened if it had been done.
Coastal and roof installations
Chillers on roofs near the coast suffer from salt corrosion of the aluminium fins. Once the fins have crumbled away from the tubes, cleaning cannot restore the capacity. We assess the coil, and where the damage is advanced we quote for replacement coils, with a protective coating if the site warrants it.
Water-cooled chiller repair
Water-cooled chiller repair involves the whole condenser water circuit, not only the chiller. The chiller rejects heat to water, the water carries it to a cooling tower, and the tower rejects it to the air. A fault anywhere in that chain shows at the chiller as high head pressure.
Reading the approach temperature
The condenser approach is the difference between the refrigerant's condensing temperature and the water leaving the condenser. On clean tubes it is small. As the tubes foul, it widens, because the refrigerant has to run hotter to push the same heat through the dirt. An approach that has doubled since the last cleaning is the clearest sign that the tubes, not the compressor, are the problem.
Tube leaks
A tube that has failed lets water into the refrigerant side, which is serious: moisture forms acid and attacks the compressor windings and bearings. We isolate and pressure test the bundle, plug or replace the failed tubes, then dehydrate the circuit by deep vacuum and replace the filter driers and oil before recharging.
Chiller compressor repair
Chiller compressor repair depends on the compressor type and on why it failed. A compressor rarely dies of old age alone. It is killed by liquid refrigerant flooding back, by loss of oil, by overheating from high head pressure, or by electrical faults. Finding the cause matters as much as replacing the machine.
After a motor burnout
When a hermetic or semi-hermetic compressor motor burns out, acid and carbon are carried through the whole refrigerant circuit. Fitting a new compressor into a contaminated system destroys it within months. The correct repair recovers the refrigerant, fits burnout filter driers in the suction and liquid lines, tests the oil for acid after a period of running, and changes the driers and oil again until the system tests clean.
Screw compressor overhaul
Screw compressors announce bearing wear through rising vibration and noise before they fail. Overhauled at that stage, the compressor needs bearings, seals and gaskets. Left until the rotors touch the housing, it needs replacement. We carry out compressor overhauls ourselves, and oil analysis from regular maintenance is what tells us when one is due.
Is the compressor really at fault?
A compressor that will not start is often blamed wrongly. We check the contactor, the overloads, the phase monitor, the control circuit, the windings' resistance and insulation, and the oil and pressure safeties before condemning it.
Refrigerant leaks: detection, repair and recharge
A refrigerant leak is the commonest reason a chiller slowly loses capacity and then starts tripping on low pressure. Topping up the charge without finding the leak wastes refrigerant and money, and the fault returns.
From suction pressure, superheat, subcooling, and bubbles in the sight glass, read together.
With an electronic detector, soap solution at joints, and where needed a nitrogen pressure test or tracer. Oil stains mark many leaks.
Into cylinders, weighed, so that the system can be opened.
Re-braze the joint, replace the valve, flare, gasket, seal or coil section.
And hold, to prove the repair.
To a deep vacuum to remove air and moisture. New filter driers are fitted.
To the maker's stated charge, then check superheat and subcooling under load.
We work with the refrigerants found in Dubai's chillers, including R134a, R407C, R410A and R22 on older plant. Refrigerant is recovered, never vented. For R22 machines, where the gas is being phased out and is costly, a large leak is often the moment to discuss replacement.
Pump, flow and control faults
Many chiller trips have nothing wrong with the refrigeration circuit at all. The chiller is protecting itself from a water flow or control problem elsewhere in the system.
Loose electrical terminations deserve a special mention. Heat cycles loosen them over the years, a loose connection overheats, and the result is a burnt contactor or a single-phased compressor. Checking and tightening terminations is part of every visit we make.
Villa water tank chillers
A water tank chiller cools the water in a villa's roof tank so that the cold tap does not run scalding in summer. These are small packaged units, and their faults differ from those of building chillers.
Because the water in these systems is drinking and washing water, the heat exchanger and tank must be kept clean. We service tank chillers before the summer: coil wash, refrigerant check, pump and thermostat test, and strainer clean. A unit sized correctly for the tank, shaded from direct sun and serviced once a year gives little trouble.
Process, industrial and glycol chiller repair
Process and industrial chillers cool machinery, moulds, lasers, food and beverage lines and other equipment, and a failure stops production. They differ from comfort cooling chillers in running year round, often at lower temperatures and with a glycol mixture.
For a production chiller, tell us what it serves and how long the process can run without it. That decides whether we repair in place, work overnight, or arrange a staged repair around production.
Trane, York, Carrier and other chiller brands
We repair all chiller brands found in Dubai. The refrigeration principles are the same across makes. What differs is the controller, the fault code scheme and the parts supply.
For Trane CenTraVac or Carrier 30GT troubleshooting, the machine's own diagnostic history is the starting point, and the maker's service literature for that model gives the meaning of each code. A chiller technician needs the code as displayed, not a description of it.
When you call, give us the make, the model and serial number from the nameplate, the refrigerant, and the exact alarm text or code. With those we can check parts availability before we set out.
Repair, overhaul, refurbishment or replacement
Whether to repair a chiller, overhaul it, refurbish it or replace it depends on its age, its refrigerant, its efficiency and the state of its heat exchangers. A chiller in sound condition is nearly always worth repairing, because replacement costs many times more and takes weeks.
What a chiller refurbishment includes
A refurbishment brings an ageing chiller back to dependable service without replacing it: compressor overhaul or exchange, new contactors and control components, coil or tube work, new filter driers and oil, refrigerant leak repair, sensor replacement and a controls upgrade where the original controller is no longer supported. It suits machines whose heat exchangers and frame are sound.
We give you the cost of each route and the expected life gained, so that the decision can be made on numbers.
What decides the cost of a chiller repair
Chiller repair costs vary too widely for a price list to be honest. A contactor is a small job. A screw compressor overhaul is a large one. These are the factors that set the price, and all are stated on our written quotation.
The diagnostic visit is AED 100 plus VAT. After it you receive a written quotation that separates parts, refrigerant, labour and any crane or access costs. Nothing is replaced until you approve it.
Emergency chiller repair, and keeping the building cool meanwhile
For a chiller that has failed in summer, the first task is to restore some cooling. The full repair follows.
Reset once if safe, restore tripped pumps and fans, and bring standby plant on line.
Raise setpoints slightly, close unused zones, and prioritise server rooms, clinics and occupied floors.
Most chillers have two or more refrigerant circuits. One can often run while the other is repaired.
Contactors, fan motors, sensors, capacitors and coil cleaning are done on the first visit.
Compressor, coil or tube work is quoted and scheduled, at night if the building needs it.
We do not supply rental chillers. Where a repair will take days and the building cannot wait, we tell you so at once, so that you can arrange temporary cooling while we work.
After the repair: preventing the next breakdown
Most chiller breakdowns are predictable from readings taken weeks earlier. After a repair we tell you what led to the failure and what would have caught it.
A maintenance contract with regular visits is the cheapest protection a chiller can have. Ours includes six visits a year. See chiller maintenance and AC and HVAC maintenance contracts. For split and ducted systems see AC repair.
Frequently asked questions
Who does chiller repair near me in Dubai?
One Click Dubai repairs chillers anywhere in Dubai, the same day and within the hour for a plant that is down. Call or WhatsApp +971 55 209 9785.
Why is my chiller not cooling?
It has either tripped on a safety, such as high pressure, low pressure or flow, or it is running with reduced capacity from fouled heat exchangers, low refrigerant or low water flow.
Why does my chiller trip on high pressure in summer?
The condenser cannot reject enough heat. On air-cooled chillers the usual causes are dirty coils and failed fans. On water-cooled chillers, fouled tubes, low flow or a cooling tower fault.
Can I keep resetting a tripped chiller?
No. Reset once at most, then call us. Each extra restart on a high pressure or oil fault puts the compressor at risk of failing for good.
Do you repair both air-cooled and water-cooled chillers?
Yes, of all types and sizes.
Do you overhaul chiller compressors?
Yes. Our own engineers overhaul and replace scroll, reciprocating, screw and centrifugal compressors.
Do you repair refrigerant leaks?
Yes. We find the leak, recover the refrigerant, repair, pressure test, evacuate and recharge by weight.
Do you repair water tank chillers for villas?
Yes, including coil cleaning, refrigerant, pumps and controls.
Do you repair Trane, York and Carrier chillers?
Yes, and other makes.
How much does chiller repair cost?
It depends on the fault, the size of the machine and the refrigerant. The diagnostic is AED 100 plus VAT, and a written quotation follows.
Do you rent out chillers?
No. We repair and maintain them.
Is the repair guaranteed?
Yes, for one month on parts and labour.
Call for a chiller repair
Call or WhatsApp +971 55 209 9785 at any hour. Give us the make and model, the alarm on the panel, and whether any cooling is still running.