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  • Typical Boiler Problems

  • The weather is cold outside and you want to keep warm.

    You turn the heating on, nothing happens, you double-check everything is switched on, still, nothing happens. What next?

    Here are some of the most typical boiler problems that we come across.

    The most common one is low water pressure.

    Most boilers now incorporate a water pressure switch, this senses the water pressure within the heating system. 

    When the boiler is switched on, the pump will spin and the sensor will determine if the pressure within is ok for the boiler to fire up.

    Low pressure will lock the boiler out from firing up.

    This is a safety feature that protects the boiler from damage.

    Most of the time this is a quick fix, just by increasing the water pressure through the fill-up link.

    This could be attached to the pipework around the boiler, or built into the boiler. 

    This will depend on the make and model of the boiler you have.

    If after increasing the pressure the boiler still does not fire up, you should then call in your local gas safe registered boiler engineer to investigate the problem.

    Another problem we come up against especially when its cold, is a blocked condense discharge pipe.

    The condense pipe if, located on the outside, can freeze up and stop the condense discharge.

    When condense cannot discharge, the boiler will then shut down until the blockage is cleared.

    It’s very important that the discharge pipe if, located on the outside is protected from becoming frozen.

    Should this happen to you, warm the pipe with warm water to clear the ice blockage?

    Sometimes you may have to cut the pipe to remove the blockage.

    Typical boiler problems come in many shapes and size.

    Another common problem is that the power supply to the boiler gets accidentally switched off, this is very common.

    Boiler controls are another cause of boiler breakdowns.

    Many boiler manufactories claim that around 80% of breakdowns are due to external controls, and not the boiler itself.

    A common problem with boilers that use LPG instead of natural gas is that the gas has run out. Or been turned off.

    Always check that the gas supply is switched on at the gas bottles, or the storage tank.

    If you find you boiler is not working carry out these simple checks first before you call someone in.

    Make sure the power is on, the clock or programmer is also on and the thermostat is set to its highest level.

    Check the boiler pressure, if it’s on the low side, top it up. No more than 1.5 bar when the system is cold.

    If its cold outside, ensure the condense pipe is clear and not frozen.

    One of the first things we do when called out to a boiler that’s not working is to carry out the above checks.

    If you try the above and the boiler still won’t fire up, it’s advisable to call in your local boiler company.

    Don’t use a friend unless they are gas safe registered just to save on the cost, it could cost you more in the end.