No hot water: what to check before you ring

Most often the immersion element or its thermostat has failed, the switch has tripped, or the boiler is off or low on pressure. An element or thermostat fitted is €120–€300.

Free, no obligation. One local plumber prices it, not five.

Check these first

  • The immersion switch is on and the timer is set to come on.
  • The trip switch for the immersion on the fuse board hasn't gone.
  • If the boiler heats your water: it's on, the display shows no fault and the pressure is about 1 to 1.5 bar.
  • Feel the cylinder in the hot press. Cold all over with the immersion on means the element or thermostat.

What it costs to fix

  • Immersion element or thermostat: €120–€300.
  • Full immersion heater: €150–€450.
  • New hot water cylinder: €500–€1,300.

When to ring straight away

  • The immersion trips the power every time you switch it on.
  • Water is leaking from the cylinder or the hot press is wet.
  • The boiler shows a fault code and won't reset.

Send the job in four taps

Tell us what's wrong. It goes to one local plumber who covers Balbriggan, and they ring you about it.

What's the job?

Pick the closest one. The plumber asks about the rest.

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Questions

Can I replace an immersion element myself?

It means draining the cylinder and working near mains electricity. Most people get a plumber.

Why does my immersion keep tripping?

Usually the element has failed and is shorting to earth. Leave it off until it's replaced.

Is it the boiler or the immersion?

If the radiators work but the water is cold, it's usually the cylinder or its controls. If neither works, it's the boiler.

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