Ducted and central recharge
AC refrigerant charging in Al Dahiyah
In Al Dahiyah, south Jeddah, villas and residential buildings with central AC need advanced checking before refrigerant work. Our team measures pressure and temperature precisely to establish whether cooling loss comes from a leak or distribution fault.
- Accurate pressure readings
- Charge recovery
- Nameplate-type charge
Clients We're Proud to Serve
Organisations and companies that trusted Alrabih with their projects.
When your system needs a refrigerant charge
- 1
Uneven cooling across zones
One office or floor feels hot while the rest of the building is cool. Before adding any refrigerant, the technician reads pressures and temperatures at several points to confirm that a low charge is actually the cause.
- 2
After a repair or component swap
Replacing a compressor, a valve or any part that opens the circuit means the old charge escapes. It must be recovered with a dedicated machine, then the line is vacuumed and recharged after the repair is done.
- 3
A system restarted after long shutdown
A central or rooftop unit shut down for a full season in Jeddah's salty coastal air may have lost part of its charge. We verify with pressure readings before adding anything, and look for a leak if the readings point to one.
Who it's for
Your villa's ducted system has lost its cooling
We read system pressures and line temperatures, find any leak in the long pipe runs, then vacuum and charge to the refrigerant type on the unit nameplate.
Ask on WhatsAppYour building's rooftop unit cools unevenly across floors
We inspect the system and its drawings, measure pressures and temperatures at multiple points to find the cause, then recover the old charge if a repair is needed and recharge to the nameplate type only.
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What the charging work covers
- Suction and discharge pressure readings
- Liquid and suction line temperatures
- Old refrigerant charge recovery
- Line vacuum before recharging
- Charge to nameplate refrigerant type
How we work
How we work
- 1
System check and readings
The technician checks the unit nameplate and system drawings, then reads suction and discharge pressures and line temperatures to judge the actual charge condition.
- 2
Find and fix the leak
If readings show a low charge, the technician finds the leak in the long line set, joints or components, and repairs it before any refrigerant is added.
- 3
Recovery and vacuum
The remaining old charge is recovered with a dedicated recovery machine, then a vacuum pump removes all air and moisture from the line before the new charge goes in.
- 4
Charge and verify
The system is charged with the refrigerant type on the nameplate only, never mixed with another type, then pressures are read again and cooling is checked across all zones.
Careful charge or a random top-up?
| Alrabih | The usual way | |
|---|---|---|
| Diagnosing the cause | Pressures and temperatures first | Add refrigerant straight away |
| The leak | Found and fixed before charging | Left to repeat the problem |
| Old charge | Recovered by machine | Vented to atmosphere |
| Refrigerant type | Nameplate type, no mixing | Whatever is to hand |
| Long line sets | Joints checked along the full run | Checked at the unit only |
Everything your AC needs, from one team
From system design and duct fabrication to installation, commissioning and maintenance.
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Some of our work
Ductwork, rooftop units and diffusers, from work we've completed in Jeddah.
Customer reviews
What our customers say
- Muhammadramzan 2641
“MashaaAllah. Services are so good. Behaviour and kindness 100/100. Prices are less then Market. Fully recommended”
- shahzeb armani
“Wow. Prices are so comfortable. Outstanding services. People are so talented and nice”
- Tawfik AlyawerLocal Guide
“U can find all u need for air conditioning”
Your satisfaction matters to us! If you had a great experience with us, we'd love a 5-star rating and a kind review.
Worked with us? Leave a reviewService areas
We come to you anywhere in Jeddah
From Al Shiraa and Al Yaqout in the north to Al Thaghr and Al Quraiyat in the south, with our base in Al Aziziyah.
What sets this district apart
Al Dahiyah is a modern residential district with medium-sized villas and apartment blocks at comfortable spacing, each with central AC distributing cooled air to multiple rooms or flats. The district is relatively new, copper pipes generally stay in good condition, but long runs may cause small pressure drops between distant points. Our check begins with precise pressure reading from the outdoor unit, then we scan for leaks with a specialist detector before charging.
Al Dahiyah is in south Jeddah, a modern residential district mixing villas and apartment blocks with comfortable spacing.
Most villas and blocks here use central AC zoned across multiple rooms, with the outdoor unit typically in a rear yard or on rooftop with ample ventilation space.
The AC setup in Al Dahiyah
- 1
Central AC zoned to multiple rooms
Villas and blocks here use one outdoor unit with zone valves to cool different rooms in the same building.
- 2
Copper lines buried in walls and ceilings
Copper runs are typically hidden in walls and ceilings, making leak detection more reliant on specialist equipment.
- 3
Wall-mounted units in different rooms
Each room or main area has a wall-mounted indoor unit connected to the main distribution pipes.
Before the visit
Before our visit in Al Dahiyah
- 1
Show us where the outdoor unit and yard are
Tell us if the unit is in the yard or on roof, and whether there is open space around it or the area is tight.
- 2
Ensure safe access around the unit
Remove anything blocking the outdoor unit, and ensure there is enough space for our team to work safely around it.
- 3
Pick reference rooms for cooling measurement
Pick one room near and one far from the outdoor unit for temperature reading, so we understand the difference between near and distant rooms.
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FAQ
Questions about AC refrigerant charging
Why can't a second refrigerant type be mixed into a ducted system?
Every refrigerant type is matched to a specific compressor, lubricating oil and operating pressures. Mixing two types shifts the pressures and contaminates the oil, straining the compressor and ruining cooling performance. We read the nameplate type and use only that.
Can a rooftop unit be recharged without shutting the whole building down?
In most cases one rooftop unit can be worked on while the others keep running, but this depends on how the system is designed and how many units it has. The technician reviews the system drawings at the survey and decides the approach that causes least disruption.
What do pressure and temperature readings tell you about a central AC system?
Suction pressure and gas line temperature show how well the evaporator coil is absorbing heat, while discharge pressure and liquid line temperature reveal condenser performance. Comparing both sets against the manufacturer's values shows whether the charge is low, high or whether another component is the real problem.
Why is the old charge recovered rather than just released?
Releasing refrigerant to the air damages the ozone layer and is prohibited. Recovery keeps the gas for proper recycling or disposal. In large systems the charge is substantial, so recovery both protects the environment and avoids losing a costly material before the repair is complete.
How does charging a ducted system differ from charging a standard split unit?
A ducted system has much longer refrigerant line sets and a larger charge, so a shortage takes longer to appear and leak-finding covers a much greater length of pipe and joints. Pressure readings must also be compared against the manufacturer's values for the whole system, not just a single indoor unit.
My rooms far from the outdoor unit are less cold than nearby ones, why?
Long runs from the unit to distant rooms may lose small amounts of pressure and cooling. We check pressure at different points in the distribution to determine if the loss is normal or suggests blockage or leakage.
My rear yard is somewhat tight, how do you inspect the outdoor unit?
We agree in advance on safe access to the outdoor unit. If space is tight, we may ask to move some items temporarily for safe working.
Al Dahiyah gets very hot in summer and some pipes are partly exposed, does that affect charging?
Yes, extreme heat can raise refrigerant pressure. We read pressure alongside outdoor temperature and compare it to the unit's nameplate chart to ensure safe charging.
The runs from yard to indoor rooms are very long, how much refrigerant do they need?
Every additional metre of pipe increases refrigerant needed. We measure the total run length and calculate the charge based on that length and the cooling load.
