How often should my boiler be firing?

March 10th, 2010 Posted in portal.juzhang.com | edit

I've recently had my electric immersion heater replaced. It is on Economy 7 and so only comes on during the night.

My previous immersion heater used to come on for about an hour as soon as Economy 7 kicked in and then that would be it for the rest of the night.

This new one kicks in at the same time, but continually switches on and off, presumably as it reaches temperature. This is quite intermittent and it will switch off for a few minutes, then on for a few minutes, then maybe off for a few seconds, then on, etc. I'm not sure how long this goes on for, but I have woken in the middle of the night to find it doing this.

Is this behaviour normal? How frequently should it be firing and how long should it stay on for? How come the behaviour of the new one is different from my old, admittedly worn out, immersion heater?

yeah its normal, it will go on when the room in not satisfied

If you think it's turning on too much you could always wrap it in insulation. It turns on when the temperature gets too low.

it sounds like u need a new thermostat its quite easy to fix

it could just be the setting on the aquastat in the boiler control . i would call the installer to fix it if you have just had it installed. that is if he is competent.

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How often should my boiler be firing?

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