Seasonal Temperatures

Hi all,
Really glad I found this forum, am hoping someone could indicate if I have a problem or not.
I have a Pulsacoil 2000 in my flat. My place is 4 years old so assume the boiler is the same age.
I have noticed that the amount of hot water I get in the morning seems to be linked to the weather.
Over the past week whilst there has been snow, I have only just had enough hot water for a quick shower.

This morning the water was nothing more than tepid and soon ran cold. It is minus 3 outside.

In anyones experience, is this normal? Is it linked to the temperature of the mains water supply?

Looking inside, the LED is flashing twice per second, which seems normal and I have no fault light on the front panel.

Any advice would be helpful.

Thanks, Gledders.

It is exactly what I encountered. The Pulsacoil is good design boiler, but it seems it is not suitable when the temperature drops to very low level, e.g. below 0 degree C. Please note that the hot water from the tap or shower doesn't come from the store tank. It is heated up through the heat exchange. There must be a maximum heat transfer via the heat exchange. If the incoming water is cold and the flow is high, it is impossible to heat up the water to hot level. I just reduce the hot water flow (at least a reasonable flow to switch on the water pump in the PulsaCoil). The above is what I understand. If it is not correct, anyone please correct.

What you are saying sounds right. It is best to get the system checked out as this should not be this bad. Sometimes a contractor will come in and replace the thermostats for the wrong ones which impact the system performance. Also sometime the sensors tend to become old and not so accurate.