Can I refill the refrigerant myself?

It is not recommended at all. Charging gas requires pressure gauges, knowing the correct refrigerant type and exact charge weight, and fixing the leak first. A mistake here can destroy the compressor.

Why does my AC cool better at night than during the day?

Because the heat load on the unit drops at night as outdoor temperatures fall, so the AC handles the heat more easily. If the day-night difference is large, check coil cleanliness and whether the unit's capacity matches the room size.

When does repairing an AC stop making sense compared to replacing it?

When the same major fault keeps returning on an old unit, when the failed part is a core component like the compressor, or when electricity consumption is clearly high, replacement becomes the more economical option. A technician can compare the repair cost with the unit's age and condition before you decide.

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Weak AC Cooling: 7 Common Causes and How to Fix Them

Weak AC cooling in Jeddah is usually dirt, not low refrigerant. Learn 7 common causes, what you can check yourself, and when to call a technician.

Our technician measuring AC outlet temperature with a digital thermometer to diagnose weak cooling

By هيثم للتكييف · Published on 6 September 2026 · Last updated 11 September 2026

When your AC starts cooling poorly in Jeddah, the cause is usually dirt on the filters and coils, not low refrigerant as many assume. Refrigerant is never consumed, so if it is low, there is a leak. Coastal humidity and dust load filters quickly, especially with near-continuous summer use. Here are the 7 most common causes, what you can check yourself, and when to call a technician.

1. Dirty filters

The sign: weak airflow from the vents even though the unit sounds normal, and the room no longer cools the way it did weeks ago. A clogged filter chokes airflow, so the AC works harder for less cooling and a higher power bill.

What you can check: switch the unit off, open the front cover, and slide the filters out. Coated in grey dust? Wash with lukewarm water, dry them fully, and repeat monthly in summer. If cooling stays weak after that, the cause is deeper.

2. Coils covered in dust

The sign: weak cooling with fairly strong airflow, or ice on the copper pipes behind the filters or at the outdoor unit. A dirty indoor coil insulates the air from the cooling surface; a dirty outdoor coil stops heat escaping outside.

What you can check: clear anything stored around the outdoor unit and look at its fins; a thick dust layer is easy to spot. Do not bend the fins or use a pressure washer. Coil washing needs proper tools and a technician. More on the timing in our article on the AC cleaning schedule for the Saudi climate.

3. Refrigerant leak or low gas

Worth clarifying: refrigerant circulates in a closed loop and is never consumed, so low gas always means a leak. Refilling without fixing the leak is a temporary patch that fails within weeks. Signs: cooling that fades over days, bubbling or hissing near the pipes, and ice on the pipes or indoor coil.

Your own check is limited to noticing ice or unusual sounds; measuring pressure and finding the leak needs proper equipment. A technician repairs the leak, then charges the correct gas by weight. See our refrigerant refill and leak detection service if these signs match.