Why once a year, and why before winter
Manufacturers expect a yearly service, and in Egypt the timing matters more than the interval. A boiler that has been off since March can have a sticky pump, low pressure or a valve that has seized. Servicing it in October finds those faults on a day you choose, instead of on the first cold night.
A boiler that also makes your hot water all year still benefits from the same yearly check, because it works hardest in winter.
On a gas boiler: burner, combustion and flue
The technician inspects and cleans the burner and the heat exchanger, checks the ignition and flame, and confirms the boiler is burning cleanly. The flue is checked from end to end for blockages, loose joints and a safe outlet, and the room’s ventilation is checked against what the manufacturer requires.
Gas connections are tested for tightness. If anything about the gas side is not right, the boiler is left off until it is put right; this part is never skipped.
On every boiler: the water side
System pressure is checked cold and hot. The expansion vessel, which absorbs the water’s growth as it heats, is checked and re-charged if needed; a flat vessel is the usual reason pressure rises and falls. The pump is checked for free running, and the pressure relief valve for leaks.
The water in the circuit is checked too. Dark, sludgy water means corrosion inside the system, which slows the flow, makes radiators cold at the bottom and shortens the boiler’s life. Depending on what is found, the circuit may need flushing, a filter, or an inhibitor that protects the metal.
Controls, safety devices and hot water
Thermostats and timers are checked and set to how the home is actually used. The boiler’s safety devices, such as the overheat cut-out and low-pressure protection, are tested so they act when they should.
If the boiler makes hot water, the hot water side is checked as well: the flow, the temperature, and on a cylinder the safety valve and, in hard-water areas, any scale building up.
Signs it is due now
Do not wait for the yearly visit if you notice pressure that keeps dropping and needs topping up, a boiler that locks out or shows a fault code, banging or gurgling noises, radiators that stay cold at the bottom, hot water that runs lukewarm, or a yellow, lazy flame on a gas boiler.
If you ever smell gas, turn the gas off at the meter, open the windows, do not touch electrical switches, leave the home and call the gas company’s emergency number.
Service checklist
| What is checked | Why it matters | |
|---|---|---|
| Burner and flue (gas) | Clean combustion, flue route, ventilation | Safety and efficiency |
| Pressure and expansion vessel | Cold and hot pressure, vessel charge | Stops pressure loss and lock-outs |
| Pump and valves | Free running, no leaks | Heat reaches every room |
| System water | Sludge, corrosion, inhibitor | Protects the boiler and radiators |
| Controls and safety devices | Thermostats, timers, cut-outs | Comfort, and protection when needed |
Book it before the cold
A service in October is the cheapest insurance against a cold January. If you have noticed any of the signs above, mention them when you book so the technician comes prepared.
Conversion EG has designed, installed and maintained heating in Egypt since 2010, with one team from design and supply through installation and maintenance. We service the boilers we install and take on boilers installed by others.
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