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  • Condensing Boiler Faults

    The condensing boiler is now classed as the standard type of boiler, gone

    are the days of the old style boiler where around 40% of the energy was lost 
    through the flue.

    With the condensing boiler, only around 7-8% is now lost through the flue.

    Once you have your old non-efficient boiler replaced with a

    new boiler you should see a difference in your gas bills, around 30-40%.

    Now as we know the cost of our energy bills keep rising, so having a  boiler fitted will help.

    So we will save around 30-40% on our gas bills with a condensing boiler, that’s good, but let me ask this question,

    Do the energy companies put the price of gas up, to make up on the lose, that we are saving on our bills?

    It seems that as soon as we come up with something that will save us money, then the costs start to rise.

    So are we saving money?

    No, I don’t think so. They say it’s good for the climate, but is this all hype to justify the price rises.

    Getting back to the condensing boiler, one of the most common faults is the condense line, or condense

    pipe getting blocked, or even frozen in bad weather.

    I have been called out so many times to a boiler that has stopped working,

    only to find the condense pipe blocked.

    Most of the time this is due to bad workmanship.

    If you have a condensing boiler and it keeps locking out, one of the first things to check is that the condense pipe,

    the symptoms are the boiler lights,

    it goes out then tries to relight a couple of times then goes to lockout. 95% of the time the cause is the condense pipe.

    The condense pipe needs a clear run from the boiler to some sort of drain,

    the ideal drain is internal, If the boiler is located within the kitchen then the ideal drain would be into the sink waste pipe.

    If this is not possible then you can install a condenser pump.

    With the pump, depending on the make and model you can pump vertical and around 20 meters,

    so you should be able to find a drainpipe to discharge into.

    If after checking you cannot find anywhere to discharge internally,

    then you need to find the closest drain externally.

    This is where most problems occur.

    The problem with discharging the condense from your condensing boiler externally is mainly in the wintertime,

    when the frost arrives, this causes the condense pipe to freeze.

    The pipe needs to be lag, but for some reason, this seems to be forgotten.

    The best way to overcome this problem is to use an oversized pipe.

    I tend to use waste pipe that I would fit the kitchen sink, I run the pipe from the drain up to the boiler, drop the discharge pipe into it.

    Because the waste pipe is a lot bigger than the condense pipe, it tends not to freeze, and you don’t have to lag the pipe.

    Something else that causes a problem with the condensing boiler is lack of servicing;

    these boilers need to be checked regularly, every 12 months. With the old style boiler you could leave them for years without any problems accruing,

    to be honest, there was not much to go wrong, but now with the condensing boiler, it has so many parts inside, that it needs to be serviced every year,

    if you don’t then trust me your boiler will not last long and it will cost you a lot of money.

    In general, the condensing boiler is very good, it’s very efficient and good for the environment

    (So They Say) so long as you look after it and have it serviced regularly by a gas safe registered engineer or company…