A neglected water heater ages quickly and breaks down when you need it most. Annual maintenance means descaling the tank, draining deposits and checking safety components. These three simple steps double your boiler's lifespan and save you costly repairs and unexpected hot water outages.
Why maintain your water heater every year
Limescale naturally accumulates in your boiler, especially in areas with hard water. This insulating layer of scale reduces heating efficiency, forces your water heater to consume more energy and accelerates wear on internal components. Without regular maintenance, you risk leaks, heating element failure or complete breakdown.
A boiler serviced annually:
- Maintains heating performance and saves you money on energy bills
- Extends its lifespan by 5 to 10 additional years
- Reduces the risk of emergency breakdowns during cold months
- Ensures reliable and clean domestic hot water
Descaling: the heart of maintenance
Descaling involves cleaning the inside of the tank to remove accumulated limescale. This white or grey deposit builds up around the electric heating element or heating coil and insulates them thermally.
For an electric or gas boiler:
- Partially drain the tank to access deposits
- Use a gentle descaling solution or eco-friendly descaler according to manufacturer recommendations
- Let the product work for a few hours
- Rinse thoroughly until water runs clear
- Refill and check for leaks
This work requires specialist tools and knowledge of hydraulic circuit safety. This is why it is recommended to entrust maintenance to a specialist plumber who can work safely and thoroughly.
Draining: inspecting and cleaning
Draining removes sediment, fine limescale and impurities that settle at the bottom of the tank. This operation is essential for maintaining quality hot water and preventing internal corrosion.
During draining, we also check:
- The condition of the sacrificial anode (magnesium rod that protects the tank from rust)
- The absence of rust or corrosion on internal walls
- The proper functioning of the non-return valve and safety group
- The quality of water flowing out
If the anode is too worn, it must be replaced to prevent rapid tank corrosion.
Safety inspection: essential
Every water heater is equipped with mandatory safety components that protect your installation and home:
- The safety group (pressure relief valve)
- The thermostat and temperature limiter
- The sacrificial anode
- Sealing gaskets
- Supply and discharge pipes
During annual maintenance, each component is checked and cleaned if necessary. The safety valve must operate freely to relieve pressure in case of overheating. A faulty thermostat can cause dangerous overheating or excessive energy consumption.
When to call a specialist
Water heater maintenance should be performed by an experienced plumber who knows Swiss standards and the specifics of each model. WK Haustechnik in Bassersdorf is here to help you:
- Completely descale your boiler
- Drain deposits and clean the tank
- Check all safety components
- Inspect the sacrificial anode and replace if necessary
- Test thermal performance
- Advise you on maintenance steps between visits
Regular maintenance typically takes about one to two hours depending on the type and size of your water heater. It is a modest investment that saves you expensive repairs and hot water outages.
Maintenance schedule to plan
The ideal time to schedule annual maintenance is before autumn, when heating restarts and hot water demand increases. If your water is very hard (which is common in Switzerland), consider maintenance every 18 months to optimize performance.
For a newly installed water heater, check the manufacturer's manual: some high-end models may extend maintenance intervals to two years.
If you notice signs of buildup (hot water taking longer to arrive, limescale noises, temperature fluctuations), contact a specialist immediately without waiting for your scheduled annual maintenance.
Frequently asked questions
How long does a water heater service take?
Complete maintenance typically takes 1 to 2 hours depending on the model and boiler condition. If descaling is extensive, the work may take longer and require a second visit.
Can I descale my water heater myself?
Without experience, there are risks of leaks, joint damage or safety issues. It is better to entrust this operation to a specialist plumber who has the right tools and products and complies with standards.
What is the lifespan of a well-maintained water heater?
A boiler serviced annually typically lasts 12 to 15 years or more. Without maintenance, the average lifespan drops to 8 to 10 years, with more breakdowns and energy consumption.
To schedule your annual maintenance and benefit from a complete and safe service, contact WK Haustechnik in Bassersdorf at +41 79 558 84 30 or request an appointment for an inspection visit and free quote. Our team responds quickly to service and repair your water heater.